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中文摘要：
在多种方案对比的基础上，设计圆钢管空间滞回试验，该试验中的加载装置适用于空间三向加载；试验考虑了构件不同长细比、不同空间加载方案的情况，据此设计加载、监测及数据采集系统；通过试验得到不同长细比、不同加载方案下的圆钢管荷载位移滞同曲线，考察这些试验数据随参数变化的规律；编制基于通用有限元软件ABAQUS的用户材料子程序，对试验进行数值模拟，确定各圆钢管试件材料本构方程中的参数，并通过最小二乘拟合方法，获得圆钢管考虑损伤累积的本构方程。通过所编制的接口程序进行理论与试验对比分析表明，数值计算曲线与试验曲线吻合良好，证明该本构方程足准确的，所编制的程序也可用于深入的理论研究工作。
英文摘要：
Spatial hysteresis experiments of circular steel pipes with multiple loading schemes were designed, including loading, monitoring and data acquisition to cover different loading schemes and different slenderness ratios, and the setup was applicable for three-dimensional loading. The hysteresis curves for different slenderness ratios and different loading schemes were obtained. A ＂ user material subroutine＂ for the finite element program ABAQUS was exploited for numerical simulation of the experiment and calculate the parameters in the constitutive model of circular steel pipes. A common constitutive model of circular steel pipes considering damage accumulation was developed using the least squares method. The comparison between the numerical simulation and the experiment shows that the numerical curves are in good agreement with the experimental curves, which proves that not only the constitutive model is accurate but also the finite element program is applicable for numerical analysis.
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