【摘要】 根据三类钢管混凝土构件的荷载位移曲线论述了Prager硬化规则应用于钢管混凝土材料非线性分析的合理性,由随动硬化材料屈服面方程的全微分出发,采用塑性势理论推导了钢管混凝土梁单元的非线性刚度矩阵。建立了钢管混凝土梁单元的初始屈服面方程,由Prager硬化规则建立了后继屈服面方程,并推导了屈服面移动量的计算公式。根据钢管混凝土的特点,探讨了确定硬化参数的方法。算例的结果有良好的精度。更多还原

【Abstract】 The reasonability of applying Prager’s hardening law to the nonlinear analysis of concrete filled steel tube(CFST) is discussed on the basis of 3 kinds of CFST members’ load-displacement relation.Beginning with the total differential of kinematics hardening yield function,the CFST beam element stiffness matrix is deduced form the plastic potential theory.The initial yield function of a CFST beam element is developed.The subsequent yield function is obtained from the Prager’s hardening law and the formula of yield surface movement is founded.The calculation of hardening parameters is discussed according to the characteristics of CFST.The calculation results show full agreement with the experimental data.更多还原