摘要
混凝土三参数统一强度理论在Haigh-Westgaard空间的偏平面上的边界线为十二边形,通过调整中间主应力的影响系数消除角点的奇异性,根据相关流动准则推导基于标量损伤的弹塑性本构方程,考虑了混凝土材料的随动强化效应,结合塑性损伤理论给出了应力计算的数值方法,编制了相应的Fortran语言程序,并将其用于钢管混凝土构件承载能力的计算,计算结果验证了所用模型的预测能力。
Trace of three-parameter unified-strength theory in the deviatoric plane is a dodecagon in the Haigh-Westgaard coordinates.The singularity at the corners can be eliminated by adjusting the coefficient of medium principal stresses.The elastoplastic constitutive formulas are deduced based on the scalar damage variables with the kinematic hardening effects of concrete.The numerical method is supplied and the corresponding Fortran program is coded to simulate the loadbearing capability of the concrete-filled steel tube components and verify the predicting capacity of this model.
出处
《应用力学学报》
EI
CAS
CSCD
北大核心
2007年第3期396-398,共3页
Chinese Journal of Applied Mechanics
关键词
统一强度理论
损伤本构
屈服函数
随动强化
角点奇异性
应力更新
unified-strength-theory,damage constitutive relationship,yielding function,kinematic hardening,singularity of corners,update of stresses.
