砼和钢筋砼 T 形截面构件受扭试验研究(Ⅰ)

Experimental Investigation of Concrete and Reinforced Concrete T-Beams in Torsion(Ⅰ)

本文描述了砼和钢筋砼 T 形截面受扭构件的裂缝开展情况和破坏模式,研究了极限扭矩与钢筋数量的关系以及砼强度对抗裂度和极限扭矩的影响。根据试验结果,本文提出了抗裂度、极限扭矩以及在使用荷载作用下最大允许扭矩的计算公式。

This paper describes the state of cracks extended in concrete and the failure models of concrete and reinforced concrete T-beams in torsion, investigates the relation between ultimate torque and amount of reinforcing steels,and investigates the effect of concrete strength on cracking torque and ultimate torque.Based on the test results the paper presents formulas for determining cracking torque,ultimate torque and the maximum admissible torque under service loads.