钢柱的空间弹塑性单元刚度方程

Spatial Elasto-Plastic Stiffness Equation of Steel Columns

在钢柱空间滞回模型研究的基础上，建立了空间受力钢柱的弹塑性单元刚度方程．该方程考虑了Ｒａｕｓｃｈｉｎｇｅｒ效应、应变强化效应和强度退化效应的影响，能够准确描述钢柱在空间交变地震作用下的非线性连续空间恢复力状态．通过箱形和Ｈ形钢柱在竖向恒载和双向水平反复荷载下的空间滞回特性试验，验证了文中理论的可行性与可靠性．文中的研究成果解决了高层建筑钢结构空间弹塑性地震反应分析的关键问题．

Based on the spatial hysteretic model, the elasto--plastic stiffness equation of steel columns subjected to spatial forces is established in this paper.This equation can precisely describe the state of nonlinear spatial restoring forces of steel columns under the actions of three--dimensional earthquakes with the consideration of Bauschinger effects, strain hardening effects and strength degeneration effects. The effectiveness and reliability of the equation are verified through applying the equation to analysis of the experiments on 5 steel box columns and 4 steel H--shaped columns subjected constant vertical loads and repeated and reversed hi--directional horizontal loads. The noticeable achievemellts of this paper is the solution to the key problem in the analysis of spatial elasto--plastic seismic response of tall steel buildings.