[Chongqing Guangdong education] Tianjin urban construction university concrete structure design principle a reference

education
- Design principle of concrete structure A- Chapter materials, examination materials - Tianjin Chengjian University 【】
Chapter one unit test
1、【 Single topic selection 】 In the development process of concrete structure design method , It belongs to the whole process design method of structural life （ That is to give consideration to structural safety 、 Applicability and durability ）, And the probability method is used to measure the structural reliability
A、 Allowable stress design method
B、 Damage stage design method
C、 Limit state design method based on probability theory
D、 Limit state design method
Reference material 【 】
2、【 Multiple choice 】 When the cross-section shape of the component is 、 The section size and concrete strength grade are the same , Compared with plain concrete members, the most significant advantage of reinforced concrete members is
A、 Improved crack resistance
B、 The section stiffness is improved
C、 Increase the bearing capacity
D、 Deformation performance improvement
E、 Self weight reduction
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3、【 Multiple choice 】 Disadvantages of concrete structures include
A、 Heavy weight
B、 Poor crack resistance
C、 Poor fire resistance
D、 Poor durability
E、 The construction is complex and there are many processes
F、 Poor thermal insulation and sound insulation performance
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4、【 Multiple choice 】 The following concrete structures are
A、 Plain concrete structure
B、 Reinforced concrete structure
C、 Prestressed concrete structure
D、 steel - Concrete composite structure
E、 Brick concrete structure
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5、【 Multiple choice 】 The classification of building structures according to the type of load-bearing structure includes
A、 Concrete structure
B、 Frame structure
C、 frame - Shear wall structure
D、 Shear wall structure
E、 Cylinder structure
F、 steel structure
G、 Wood structure
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6、【 Multiple choice 】 In concrete structures , Steel and concrete work together （ That is, joint stress and deformation ） Is the condition of
A、 They have good adhesion
B、 They have similar coefficient of temperature linear expansion
C、 Concrete mainly bears pressure , The reinforcement mainly bears tensile force , The two learn from each other
D、 An appropriate amount of reinforcement shall be provided in the concrete , It can improve the bearing capacity and deformation capacity of the structure
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7、【 Multiple choice 】 The basic components of concrete structure include
A、 Flexural member
B、 Shear member
C、 Compression members
D、 Tension member
E、 Torsional member
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8、【 Judgment questions 】 In reinforced concrete structures and members , The quantity and arrangement of stressed reinforcement only need to meet the calculation requirements .
A、 correct
B、 error
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9、【 Judgment questions 】 This course is mainly based on the current 《 Code for design of concrete structures 》（GB50010-2015） Write and teach .
A、 correct
B、 error
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10、【 Completion 】 By beam 、 plate 、 wall （ Or column ）、 The load-bearing skeleton system of the building composed of basic components such as foundation , be called
A、
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11、【 Completion 】 The structure mainly made of concrete is called
A、
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12、【 Completion 】 In concrete structures , Concrete mainly bears , The reinforcement mainly bears tensile force .
A、
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Chapter 2 unit test
1、【 Single topic selection 】 The brand is HRB400 Hot rolled steel bars , Numbers 400 Express
A、 The design value of tensile strength is 400MPa
B、 The design value of compressive strength is 400MPa
C、 The standard value of yield strength is 400MPa
D、 The standard value of ultimate strength is 400MPa
Reference material 【 】
2、【 Single topic selection 】 The basis for determining the strength grade of concrete is
A、 Standard value of axial compressive strength
B、 Standard value of axial tensile strength
C、 Standard value of cube compressive strength
D、 Standard value of prismatic compressive strength
Reference material 【 】
3、【 Single topic selection 】 Creep of concrete refers to
A、 Under the long-term continuous action of constant compressive stress , The phenomenon that the compression deformation of concrete increases with time
B、 Under the long-term continuous action of constant tensile stress , The phenomenon that the tensile deformation of concrete increases with time
C、 Under the long-term continuous action of constant stress , The phenomenon that the deformation of concrete increases with time
D、 Under repeated loads , The phenomenon that the deformation of concrete increases with time
Reference material 【 】
4、【 Single topic selection 】 The bond force between Deformed Reinforcement and concrete mainly comes from
A、 Chemical bond
B、 The frictional force
C、 Mechanical bite force
D、 The anchoring force generated by the hook at the end of the reinforcement
Reference material 【 】
5、【 Single topic selection 】 On the factors affecting the bond strength between reinforcement and concrete , It's wrong to say
A、 The higher the concrete strength , The higher the bond strength
B、 The larger the clear distance of reinforcement , The higher the bond strength
C、 The smaller the thickness of the protective layer , The higher the bond strength
D、 The bond strength of deformed reinforcement is higher than that of plain round reinforcement
Reference material 【 】
6、【 Single topic selection 】 In order to accumulate bond stress, the reinforcement can bear the required tension , The end of the stressed reinforcement shall have enough space extending into the support
A、 Anchorage length
B、 Extension length
C、 Transfer length
D、 Lap length
E、 Support length
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7、【 Multiple choice 】 The indexes reflecting the plastic properties of reinforcement include
A、 yield strength
B、 Ultimate strength
C、 Cold bending performance
D、 Uniform elongation
E、 Strong Qubi
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8、【 Multiple choice 】 The connection methods of reinforcement include
A、 Binding and lapping
B、 Mechanical connection
C、 Bolted connection
D、 welding
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9、【 Judgment questions 】 For reinforcement without obvious flow amplitude （ Hard steel ）, The conditional yield strength is taken as the limit value of reinforcement strength in the calculation of bearing capacity .
A、 correct
B、 error
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10、【 Judgment questions 】 The strength of concrete under biaxial compression is lower than that under uniaxial compression .
A、 correct
B、 error
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11、【 Judgment questions 】 The bond force between Deformed Reinforcement and concrete is better than that of plain round reinforcement .
A、 correct
B、 error
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12、【 Judgment questions 】 The basic anchorage length of tensile reinforcement refers to , The minimum anchorage length determined on the principle of no bond anchorage failure when the reinforcement stress reaches the yield strength .
A、 correct
B、 error
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13、【 Completion 】 Domestic ordinary steel bars shall be made according to the standard value of yield strength , It is divided into four strength grades , namely 300MPa、335MPa、400MPa and .
A、
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14、【 Completion 】《 Code for design of concrete structures 》 Regulations , The domestic ordinary reinforcement for reinforced concrete structure is .
A、
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15、【 Completion 】 After the reinforcement is stressed , If its length remains the same , The phenomenon that the stress of reinforcement decreases with the increase of time is called .
A、
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Chapter 3 unit test
1、【 Single topic selection 】 The following are beyond the serviceability limit state
A、 Deformation of components affecting normal use
B、 Loss of stability of structures or members
C、 Plastic hinge appears in the middle support of continuous beam
D、 It is not suitable to continue bearing due to excessive plastic deformation
E、 The cantilever awning overturned
F、 The retaining wall slips
Reference material 【 】
2、【 Single topic selection 】 When the permanent load effect is unfavorable to the structure , The partial coefficient shall be taken as
A、1.0
B、1.2
C、1.3
D、1.4
E、1.5
F、0.8
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3、【 Single topic selection 】 The following indirect effects are
A、 wind
B、 snow
C、 The earthquake
D、 dead weight
E、 To hit
F、 The explosion
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4、【 Single topic selection 】 The structural design methods mainly include ① Damage stage method ;② Allowable stress method ;③ Limit state design method based on probability theory, etc , The correct ranking by time of occurrence is
A、①②③
B、②①③
C、①③②
D、③②①
E、②③①
F、③①②
Reference material 【 】
5、【 Single topic selection 】 The probability that the building structure will complete the predetermined function within the specified time and under the specified conditions is called
A、 Safety
B、 Security
C、 Reliability
D、 reliability
E、 Ductility
F、 Ductility coefficient
Reference material 【 】
6、【 Single topic selection 】 When designing building structures , The basic representative values used for various loads are
A、 Standard value of load
B、 Design value of load
C、 Load combination value
D、 Quasi permanent value of load
E、 Load frequency value
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7、【 Multiple choice 】 The three functional requirements of the structure are
A、 Security
B、 Applicability
C、 Durability
D、 reliability
E、 Ductility
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8、【 Multiple choice 】 The following are beyond the limit state of bearing capacity
A、 The crack width exceeds the specified limit
B、 The deflection exceeds the specification limit
C、 A structure or component loses balance as a rigid body
D、 The tensile stress of concrete in prestressed members exceeds the limit value of the code
E、 The beam is damaged due to insufficient reinforcement
F、 During construction, the floor slab collapsed due to premature formwork removal
G、 Instability of eccentrically compressed columns
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9、【 Multiple choice 】 Representative values of variable loads include
A、 Standard value
B、 Design value
C、 Combination value
D、 Quasi permanent value
E、 Frequency value
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10、【 Judgment questions 】 Structural reliability index The bigger it is , Structural failure probability The bigger it is .
A、 correct
B、 error
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11、【 Judgment questions 】 The service life of the structure is equal to the design reference life , After the service life of the structure exceeds the design reference period , The structure is scrapped , No more use .
A、 correct
B、 error
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12、【 Judgment questions 】 The load design value shall be used to calculate the bearing capacity limit state and normal service limit state , This tends to be safe .
A、 correct
B、 error
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13、【 Judgment questions 】 The combination value coefficient of variable load refers to when there are two or more variable loads acting on the structure , Considering that they reach the maximum at the same time （ Standard value ） A reduction made with a low probability of .
A、 correct
B、 error
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14、【 Completion 】 The limit state of structure can be divided into bearing capacity limit state 、 Limit state and durability limit state .
A、
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15、【 Completion 】 According to the variation over time , Structural action can be divided into permanent action 、 Variable action and effect .
A、
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16、【 Completion 】 Target reliability index （ Or design reliability index ） The bigger it is , The higher the probability of failure , The more reliable the structure is .
A、
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Chapter 4 unit test （1）
1、【 Single topic selection 】 The calculation basis of flexural capacity of normal section of flexural members is （ ）
A、Ⅰa state
B、Ⅱa state
C、Ⅲa state
D、 The first Ⅱ Stage
E、 The first Ⅰ Stage
F、 The first Ⅲ Stage
Reference material 【 】
2、【 Single topic selection 】 The checking calculation of crack resistance of flexural members is based on （ ）
A、Ⅰa state
B、Ⅱa state
C、 Ⅲa state
D、 The first Ⅱ Stage
E、 The first I Stage
Reference material 【 】
3、【 Single topic selection 】 The basic formula for calculating the normal section bearing capacity of flexural members is established according to which failure mode ( )
A、 Less tendon damage
B、 Reinforcement failure
C、 Super reinforcement failure
D、 Boundary breaking
E、 Brittle failure
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4、【 Single topic selection 】 Which of the following conditions cannot be used to judge the failure of suitable reinforcement and over reinforcement （ ）
A、
B、
C、
D、
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5、【 Single topic selection 】 In the calculation of normal section bearing capacity of flexural members with double reinforcement section , To ensure the yield of compression reinforcement, it is necessary to meet （ ）
A、
B、
C、
D、
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6、【 Single topic selection 】 The most effective way to improve the flexural capacity of flexural members is （ ）
A、 Improve the strength grade of concrete
B、 Increase the thickness of protective layer
C、 Increase the section height h
D、 Increase the section width b
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7、【 Multiple choice 】 The failure characteristics of reinforced concrete single reinforced rectangular section reinforced beam are （）
A、 Yield of tensile reinforcement
B、 Yield of compression reinforcement
C、 The concrete in the compression zone is crushed
D、 It belongs to ductile failure
E、 It belongs to brittle failure
Reference material 【 】
8、【 Multiple choice 】 On the boundary failure of reinforced concrete beams , The following statement is correct （）
A、 Tensile reinforcement yields first , Then the concrete in the compression zone is crushed
B、 While the tensile reinforcement yields, the concrete in the compression area is crushed
C、 It is the boundary between properly reinforced beam and super reinforced beam
D、 It is the boundary between properly reinforced beam and less reinforced beam
E、 Compression reinforcement yields first , Then the concrete in the compression zone is crushed
F、 The concrete in the compression zone is crushed while the compression reinforcement yields
G、 It belongs to ductile failure
H、 It belongs to brittle failure
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9、【 Judgment questions 】 The greater the thickness of concrete cover, the better .
A、 correct
B、 error
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10、【 Judgment questions 】 The reinforced concrete beam under normal service conditions is in the second stage of beam operation Ⅲ Stage .
A、 correct
B、 error
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11、【 Judgment questions 】 Section review in progress , If , It means that the beam is damaged , The bearing capacity is zero .
A、 correct
B、 error
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12、【 Judgment questions 】 The failure characteristics of reinforced concrete beams with suitable reinforcement are ： The failure starts from the yield of the tensile reinforcement , Then the concrete in the compression area is crushed .
A、 correct
B、 error
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13、【 Completion 】 The thickness of concrete cover refers to （）
A、
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14、【 Completion 】 In the calculation of flexural capacity of normal section of reinforced concrete flexural members , May adopt The graph replaces the theoretical stress graph of concrete in the compression area .
A、
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Chapter 4 unit test （2）
1、【 Single topic selection 】 The following statement is correct
A、 When the concrete reaches the axial tensile strength, it will crack
B、 When the concrete reaches the axial compressive strength, it is crushed
C、 The first stage of normal section work of reinforced beam is elastic stage
D、 When the concrete reaches the ultimate compressive strain, it will be crushed
E、 When the concrete reaches the ultimate tensile strain, it will crack
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2、【 Single topic selection 】 The first category T Reinforcement ratio of V-section by
A、
B、
C、
D、
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3、【 Single topic selection 】 Section dimensions of the following beams （b×h), The reasonable design is
A、230×500
B、400×850
C、250×550
D、320×750
E、250×900
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4、【 Single topic selection 】 About boundary breaking , The following statement is wrong
A、 Boundary between properly reinforced beam and super reinforced beam
B、 It belongs to ductile failure
C、 It belongs to brittle failure
D、 It belongs to the scope of super reinforced beam
E、 It belongs to the scope of reinforced beam
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5、【 Multiple choice 】 The basic assumptions for calculating the normal section bearing capacity of flexural members are
A、 The section strain remains flat
B、 Regardless of the compressive strength of the concrete
C、 The ultimate tensile strain of longitudinal tensile reinforcement is taken as 0.01
D、 Compressive stress-strain relationship of concrete using parabola and horizontal section
E、 The stress of longitudinal reinforcement is the product of reinforcement strain and elastic modulus , And the stress of tensile reinforcement shall not be greater than the design value of tensile strength , The stress of compression reinforcement shall not be greater than the design value of its compressive strength .
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6、【 Multiple choice 】 The following statement is correct
A、 The thickness of the protective layer from the edge of the reinforcement to the outer surface of the concrete
B、 Normal section of reinforced beam I Stage , The tensile stress graph of concrete is a straight line at the initial stage , Later is the curve
C、 Normal section of reinforced beam II Stage , The relationship between bending moment and section curvature is a curve
D、 if , Then the beam must be a properly reinforced beam
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7、【 Multiple choice 】 In general , The load-bearing reinforcement to be configured in the beam includes
A、 Longitudinal tensile reinforcement
B、 Longitudinal compression reinforcement
C、 Distributed reinforcement
D、 Erection bar
E、 Stirrups
F、 lumbar muscles
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8、【 Judgment questions 】 The height of the relative compression zone comprehensively reflects the matching relationship between the longitudinal tensile reinforcement and the effective area of concrete , Therefore, it is also called reinforcement coefficient .
A、 correct
B、 error
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9、【 Judgment questions 】 Double reinforced beam , In order to ensure the yield of compression reinforcement, it must meet .
A、 correct
B、 error
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10、【 Judgment questions 】 In order to avoid less reinforcement damage , Should make .
A、 correct
B、 error
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11、【 Judgment questions 】 For cast-in-situ reinforced concrete ribbed beam floor , Press T The bending bearing capacity of the mid span section of the continuous beam is calculated .
A、 correct
B、 error
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12、【 Completion 】 In reinforced concrete slab , The distributed reinforcement shall be arranged at the bottom of the stressed reinforcement
A、
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13、【 Completion 】 The tensile reinforcement is configured in the tensile area , The beam with compression reinforcement in the compression area is called
A、
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14、【 Completion 】 Bending of normal section of reinforced beam Ia Stage is The basis of calculation .
A、
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15、【 Completion 】 For cast-in-situ reinforced concrete ribbed beam floor , Press Calculate the flexural bearing capacity of the bearing section of the continuous beam .
A、
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Chapter V unit detection （1）
1、【 Single topic selection 】 In case of diagonal compression failure of beams without web reinforcement , Its shear capacity depends on
A、 Tensile strength of concrete
B、 Compressive strength of concrete
C、 Shear compression composite strength of concrete
D、 Tensile strength of stirrups
E、 Compressive strength of stirrups
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2、【 Single topic selection 】 With the decrease of shear span ratio , Shear capacity of beams without web reinforcement
A、 Reduce
B、 increase
C、 unchanged
D、 It has nothing to do with the shear span ratio
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3、【 Single topic selection 】 In order to avoid diagonal compression failure of reinforced concrete beams , Should make
A、 The section size of the beam shall not be too small
B、 The section size of the beam shall not be too large
C、 The reinforcement ratio of stirrup shall not be too small
D、 The reinforcement ratio of longitudinal tensile reinforcement shall not be too small
E、 The reinforcement ratio of longitudinal tensile reinforcement shall not be too large
F、 The reinforcement ratio of stirrup shall not be too large
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4、【 Single topic selection 】 In order to ensure the bending bearing capacity of inclined section , The bending of longitudinal reinforcement shall meet
A、 The distance from the bending end of the bent reinforcement to the edge of the support or to the bending start of the previous row of bent reinforcement shall not be greater than the maximum spacing of stirrups
B、 The distance from the bending end of the bent reinforcement to the edge of the support or to the bending start of the previous row of bent reinforcement shall not be less than the maximum spacing of stirrups
C、 The distance between the bending starting point and the section making full use of the reinforcement according to the calculation shall not be less than 0.5h0
D、 The distance between the bending starting point and the section making full use of the reinforcement according to the calculation shall not be greater than 0.5h0
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5、【 Single topic selection 】 If longitudinal reinforcement conditions do not allow , The bent reinforcement can also be set separately , be called
A、 Suspender
B、 Duck tendon
C、 Floating tendons
D、 lumbar muscles
E、 Additional transverse reinforcement
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6、【 Multiple choice 】 In order to prevent the shear failure of the inclined section of the beam , The beam shall have
A、 Reasonable section size
B、 Necessary stirrups
C、 Necessary longitudinal stressed reinforcement
D、 Erection bar
E、 Bend the reinforcement if necessary
F、 lumbar muscles
G、 Distributed reinforcement
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7、【 Multiple choice 】 On the calculation of shear capacity of inclined section of reinforced concrete flexural members , The following is true
A、 Midspan section
B、 Section at edge of support
C、 The bending point of the reinforcement in the tensile area
D、 Where the cross-sectional area or spacing of stirrups changes
E、 Where the web width changes
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8、【 Multiple choice 】 If bending reinforcement is configured in reinforced concrete beam , Then the determination of the starting point of the bend shall meet the following requirements at the same time
A、 Flexural capacity of normal section
B、 Compression bearing capacity of normal section
C、 Tensile bearing capacity of normal section
D、 Shear capacity of inclined section
E、 Bending capacity of inclined section
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9、【 Judgment questions 】 The failure mode of oblique section of flexural members is , Shear compression failure belongs to ductile failure , Oblique compression failure and oblique tension failure belong to brittle failure .
A、 correct
B、 error
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10、【 Judgment questions 】 In the calculation of shear capacity of reinforced concrete beams , The cable-stayed failure can be avoided by meeting the conditions of minimum stirrup ratio and structural requirements .
A、 correct
B、 error
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11、【 Judgment questions 】 If the number of stirrups is too large , The beam will be damaged by over reinforcement .
A、 correct
B、 error
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12、【 Completion 】 The oblique section bearing capacity of flexural members includes oblique section shear bearing capacity and oblique section bearing capacity Bearing capacity .
A、
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13、【 Completion 】 Reinforced concrete beams should be As a reinforcement bearing shear .
A、
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14、【 Completion 】 The shear failure mode of inclined section of beam with web reinforcement is similar to And stirrup configuration .
A、
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Chapter 6 unit test （1）
1、【 Single topic selection 】 Slender reinforced concrete columns with large slenderness ratio , It could happen
A、 Large eccentric compression failure
B、 Small eccentric compression failure
C、 Material damage
D、 Instability failure
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2、【 Single topic selection 】 The essential criterion of large eccentric compression members is
A、
B、
C、
D、
E、
F、
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3、【 Single topic selection 】 according to Nu-Mu Correlation curve , The following statement is not true
A、 When the boundary is broken ,Mu Maximum
B、 When the boundary is broken ,Nu Maximum
C、 In case of small bias failure ,Nu along with Mu To increase and decrease
D、 In case of small bias failure ,Mu along with Nu To increase and decrease
E、 In case of large bias failure ,Nu along with Mu To increase with
F、 In case of large bias failure ,Mu along with Nu To increase with
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4、【 Single topic selection 】 Small eccentric compression column with symmetrical reinforcement , The following should be Group is used as the control internal force for reinforcement calculation .
A、M=100kN.m,N=150kN
B、M=100kN.m,N=500kN
C、M=200kN.m,N=150kN
D、M=200kN.m,N=500kN
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5、【 Single topic selection 】 When calculating the normal section bearing capacity of large eccentric compression members , In order to ensure the yield of compression reinforcement, it is necessary to meet
A、
B、
C、
D、
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6、【 Multiple choice 】 The section forms suitable for reinforced concrete eccentric compression members include
A、 square
B、 rectangular
C、 I-shape
D、 circular
E、 Regular polygon
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7、【 Multiple choice 】 Failure characteristics of reinforced concrete compression members with large slenderness ratio , The following is true
A、 Failure due to depletion of section material strength
B、 Failure due to unbalance of longitudinal bending of members
C、 The failure is caused by the yield of the tensile reinforcement
D、 The cause of failure is that the concrete at the edge of the compression zone is crushed
E、 Instability failure
F、 Material damage
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8、【 Multiple choice 】 The following failure modes of normal section of reinforced concrete eccentric compression members are
A、 Tensile failure
B、 Compression failure
C、 Large eccentric compression failure
D、 Small eccentric compression failure
E、 Reinforcement failure
F、 Super reinforcement failure
G、 Less tendon damage
H、 Material damage
I、 Instability failure
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9、【 Multiple choice 】 The following are ductile failure
A、 Reinforcement failure
B、 Super reinforcement failure
C、 Less tendon damage
D、 Baroclinic failure
E、 Shear compression failure
F、 Cable-stayed failure
G、 Large eccentric compression failure
H、 Small eccentric compression failure
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10、【 Judgment questions 】 The longitudinal stressed reinforcement of eccentric compression members shall be placed evenly along the periphery of the section .
A、 correct
B、 error
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11、【 Judgment questions 】 In general , The characteristics of small eccentric compression failure are ： The axial force is close to N The concrete at the edge of the compression zone on one side is crushed first , The distal reinforcement may be in tension or compression , But they have not reached tensile yield .
A、 correct
B、 error
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12、【 Judgment questions 】 The characteristics of large eccentric compression failure are ： The tensile reinforcement reaches the yield strength first , Then the concrete at the edge of the compression zone is crushed .
A、 correct
B、 error
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13、【 Completion 】 The reinforcement ratio of all longitudinal reinforcement in reinforced concrete column should not be greater than %.
A、
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14、【 Completion 】 For complex section shape （ Such as I-shape and L Shaped section ） The artifacts , It is not allowed to use the method with Stirrups for , To avoid outward tension , The concrete at the corner is damaged .
A、
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15、【 Completion 】 In the calculation of compression bearing capacity of normal section of axial compression ordinary stirrup column , use Indicates the reduction of the bearing capacity of the long column .
A、
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The first 8 Chapter Unit tests
1、【 Single topic selection 】 The initial crack of reinforced concrete pure torsion member generally occurs at the place with the largest torsional shear stress , namely
A、 Near the midpoint of the short side of the section and about the axis of the member 45° horn
B、 Near the midpoint of the short side of the section and about the axis of the member 60° horn
C、 Near the midpoint of the long side of the section and about the axis of the member 45° horn
D、 Near the midpoint of the long side of the section and about the axis of the member 60° horn
Reference material 【 】
2、【 Single topic selection 】 In order to improve the ductility of torsional members , Torsional members shall be designed to
A、 Reinforced members
B、 Some super reinforced members
C、 Super reinforced member
D、 Less reinforced members
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3、【 Single topic selection 】 Which of the following is not the basic assumption of variable angle space truss model
A、 Concrete is only under pressure , The concrete shell with spiral cracks forms the diagonal compression bar of the truss , Its inclination is α
B、 Longitudinal bars and stirrups only bear tensile force , The chords and webs of the truss are considered respectively
C、 Ignore the torsional action of core concrete and the pin bolt action of reinforcement
D、 The deformation of the section conforms to the assumption of plane section
Reference material 【 】
4、【 Single topic selection 】 In the calculation of bearing capacity of reinforced concrete shear torsion members , Whether to consider the relationship between the resistance of concrete and reinforcement , The following statement is correct
A、 Concrete is not considered , Reinforcement consideration
B、 Concrete is considered , Reinforcement is not considered
C、 Neither of them consider
D、 Both consider
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5、【 Single topic selection 】 When calculating shear torsion members, it is necessary to pass βt Consider the correlation between shear and torsional bearing capacity ,βt be called
A、 Reduction coefficient of torsional bearing capacity of concrete in shear torsion members
B、 Reduction coefficient of concrete shear bearing capacity of shear torsion members
C、 Reduction coefficient of concrete torsional bearing capacity of torsional members
D、 Reduction coefficient of concrete shear capacity of torsional members
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6、【 Multiple choice 】 The failure modes of members under the combined action of bending, shear and torsion are
A、 Bending failure
B、 Torsional failure
C、 Shear Torsion failure
D、 Tensile failure
E、 Compression failure
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7、【 Multiple choice 】 The general principles of reinforcement calculation of flexural shear torsional members include
A、 The longitudinal reinforcement shall be calculated according to the bending member and shear torsion member , And configured in the corresponding position
B、 The longitudinal reinforcement shall be calculated according to the bending member and pure torsion member , And configured in the corresponding position
C、 Stirrups shall be calculated according to bending members and shear torsion members , And configured in the corresponding position
D、 The stirrup shall be calculated according to the stirrup superposition required for flexural members and pure torsional members , And configured in the corresponding position
E、 Stirrups shall be calculated according to the required stirrup configuration of pure torsion members
F、 Stirrups shall be calculated according to the required stirrup configuration of shear torsion members
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8、【 Multiple choice 】 The longitudinal torsional section of a rectangular member , Should be
A、 The four corners of the section must be set
B、 Evenly and symmetrically arranged along the long side of the section
C、 Evenly and symmetrically arranged along the short side of the section
D、 Evenly and symmetrically arranged along the periphery of the section
E、 It shall not be less than the minimum reinforcement requirement
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9、【 Multiple choice 】 Calculation of I-section shear torsion members , The cross-section can be divided into several rectangular cross-sections for analysis respectively , among
A、 The web is considered as a shear torsion member
B、 Compression flanges are considered as pure torsion members
C、 The tension flange is regarded as a pure torsional member
D、 The web is treated as a pure torsional member
E、 Compression flanges are considered as shear torsion members
F、 The tension flange is considered as a shear torsion member
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10、【 Judgment questions 】 The failure mode of torsional member has nothing to do with the reinforcement ratio of torsional longitudinal reinforcement , But it is related to the reinforcement ratio of torsional stirrup .
A、 correct
B、 error
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11、【 Judgment questions 】 The cracking torque of torsional members is controlled by the design value of concrete compressive strength .
A、 correct
B、 error
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12、【 Judgment questions 】 The purpose of controlling the minimum section size of flexural shear torsional members is to avoid the super reinforcement failure of concrete crushing before reinforcement yield .
A、 correct
B、 error
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13、【 Completion 】 Torsional members are distinguished by statically indeterminate and statically indeterminate , Can be divided into And coordinated torsion .
A、
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14、【 Completion 】 According to the reinforcement ratio of longitudinal reinforcement and stirrup , Torsional members can be divided into appropriate reinforcement failure 、 、 There are four types of failure modes: over reinforcement failure and less reinforcement failure .
A、
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15、【 Completion 】 When using the variable angle space truss model to calculate the receiving capacity of pure torsional members , It is mainly made of concrete shell 、 Longitudinal reinforcement and The three together form a variable angle space truss to resist torque .
A、
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