T形截面RC纯扭构件极限强度

The Limiting Strength of the Pure Torsional RC Element with T Section

推导了钢筋和混凝土应变协调关系并考虑混凝土具有软化效应的本构方程，首先将矩形截面钢筋砼统扭构件的扭矩以显式的形式用扭转角描述，依据试验结果所得出的变形条件，［１］首次得到Ｔ形截面钢筋砼纯扭构件极限强度的解析表达式．计算结果与试验值相吻合；对现行设计方法提出了一种修正方案．

The strain consistenCy condition of reenforcement and concrete is derived,and theconstitutive equation of concrete with softness effect is taken into account. The torsional moment of the pure torsional RC element with rectangle section is explicitly represented interms of the torsion angle. According to the deformation conditinus resulting from expelments, the analytic exprssion of the liciting strength of the pure tortional RC element with Tsection is for the first ti￣ obtained in this paper. The computational results are quite identical with the experiment,which can be used as the basis for engineering design and verifyingapproximate solution. Finally,th6 way in which the present design method may be modified isput forward.