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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 study of the spatial hysteresis model of steel columns, the elasto-plastic unit stiffness equations of steel columns with space stress are established. This equation takes into account the influence of Rauschinger effect, strain hardening effect and intensity degradation effect, and can accurately describe the nonlinear continuous space restoring force state of steel column under the action of spatially alternating earthquakes. The space hysteretic behavior tests of the box and H-shaped steel columns under vertical dead load and bidirectional horizontal repeated loads are carried out to verify the feasibility and reliability of the theories. The research results in the paper have solved the key problems of space elasto-plastic seismic response analysis of high-rise building steel structures.