采用纤维铰法的钢框架二阶非线性动力分析

考虑几何非线性和材料非线性,建立了适用于钢框架非线性动力分析的简洁且有效的数值程序。通过采用拉弯或压弯下梁柱节点稳定性求解中的稳定函数来考虑几何非线性。通过追踪横截面上整合点处沿杆长方向每个纤维的单轴应力-应变关系,确定横截面上沿杆长方向的的塑性发展。通过采用平均加速度方法的计算机程序,求解动力方程。与ABAQUS程序计算结果对比,验证了本程序的准确性和计算效率。

Second-Order Inelastic Dynamic Analysis of Steel Frames Using Fiber Hinge Method

This paper presents a simple and effective numerical procedure for the nonlinear inelastic dynamic analysis of steel frames under dynamic loadings which considers both geometric and material nonlinearities.The geometric nonlinearities are included by using stability functions obtained from the exact stability solution of a beam-column subjected to axial force and bending moments.The spread of plasticity over the cross section and along the member length is captured by tracing the uniaxial stress-strain rela...