Prestressing by（）involves installing and stressing prestressing strand of bar tendons only after the concrete has been placed, hardened and attained a minimum compressive strength for that transfer.
举一反三
- A tendon with a duct that contains multiple pieces of prestressing steel strand is commonly called a（）tendon.
- In the heating curing of concrete, the loss of prestressing force caused by the difference in temperature between the tensile reinforcement and the tensile equipment only exists in the pretension component.
- In the heating curing of concrete, the loss of prestressing force caused by the difference in temperature between the tensile reinforcement and the tensile equipment only exists in the pretension component. A: 正确 B: 错误
- The loss of prestressing concrete members after the preloading of concrete (the second batch) is A: [img=146x34]1803b952676ef16.png[/img] B: [img=143x41]1803b9526fa4eb0.png[/img] C: [img=36x29]1803b95277ef881.png[/img] D: [img=93x35]1803b9527fd24f9.png[/img]
- 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.