举一反三
- In conventional reinforced concrete, the high tensile strength of steel is combine with concrete's great ________________ to form a structural material that is strong in both ________ and ________.
- A reinforced concrete rectangular beam of C40 grade concrete is reinforced with HRB400 grade steel bars in tension. Given that [img=14x23]17de816843b92c0.png[/img] is 1.71[img=62x27]17de81684ecebb0.png[/img] and fy is 360[img=62x27]17de81684ecebb0.png[/img] the minimum reinforcement ratio of longitudinal tensile reinforcements should be ( ). A: 0.18% B: 0.19% C: 0.20% D: 0.21%
- The truncated position of the longitudinal steel bar in the reinforced concrete beam is at the point where the steel bar is fully utilized.
- Concrete is basically a compressive material and has good tensile strength.
- Under a certain long-term load, concrete would creep. In the reinforced concrete axial compressive members: A: Creep increases the compressive stress of concrete. B: The compressive stress of concrete and steel bar keeps unchanged. C: Creep decreases the compressive stress of concrete and increases the compressive stress of steel bar. D: Creep increases the compressive stress of concrete and decreases the compressive stress of steel bar.
内容
- 0
The truncated position of the longitudinal steel bar in the reinforced concrete beam is at the point where the steel bar is fully utilized. A: 正确 B: 错误
- 1
The specific meaning of the terms "reinforced concrete and prestressed concrete" are ______ .
- 2
In general, the damping ratio of steel structures is than that of the reinforced concrete structure. That is, the seismic action of the steel structure is than that of the reinforced concrete structure under the same structure period, mass and other parameters. ( ) A: smaller smaller B: smaller larger C: larger smaller D: larger larger
- 3
According to their , buildings are mainly of wood structure, masonry structure, reinforced concrete structure, steel structure and mixed structure.
- 4
Which of the following is the mostly used type of concrete pavement? A: Jointed plain concrete pavement (JPCP) B: Jointed reinforced concrete pavement (JRCP) C: Continuously reinforced concrete pavement (CRCP) D: Prestressed Concrete Pavements (PCP)