预应力混凝土复合受力时抗扭强度分析

Theoretical analysis of the torsional strength of pretressed concrete member subjected to complex loading

应用变角空间桁架模型和开裂混凝土的“软化”本构关系，针对以扭为主复合受力下的预应力混凝土构件，建立了抗扭强度分析的理论模型，并列出了相应的方程．通过与试验结果的比较分析，验证了所用模型和方程的合理性．

On the basis of the experimental and theoretical studies, this paper presents atheoretical model for analyzing the torsional strength of prestressed concrete member subjected to torsion-predominant complex loading. Then, by using the space truss theory withvariable inclination and the constitutive relation of softened concrete and the steel, the equations related to the model are established and the iterative calculating program complied. Bycomparing the theoretical results with the experimental ones, it is shown that the model andits equations presented in this paper are feasible.