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中文摘要：
为研究型钢混凝土构件在往复荷载下的弹塑性滞回性能，采用开源的地震工程模拟系统OpenSEES进行有限元数值模拟。选用基于Kent—Scott—Park混凝土本构关系和Giuffre-Menegotto—Pinto钢筋本构关系的纤维模型，对钢筋混凝土（Reinforced Concrete，RC）柱试件和型钢混凝土（Steel Reinforced Concrete，SRC）柱试件建模。分析结果表明：将OpenSEES中基于纤维模型的位移型梁柱单元（Displacement—Based Beam—Column,DBBC）、零长度单元和P—Delta转换器结合使用，能体现SRC柱在不同轴压比下滞回环的特点，较好地反映型钢对混凝土柱强度与刚度的加强作用，模拟SRC柱试件在大变形下的非线性反应，可供SRC结构构件数值模拟和地震反应分析参考。
英文摘要：
In order to study the elastic-plastic hysteretic properties of the steel reinforced concrete （SRC） structure under low-cyclic load, an open-source earthquake engineering simulation system OpenSEES is used to conduct a finite element numerical simulation. Basing on Kent-Scott-Park concrete constitutive relation and Giuffre-Menegotto-Pinto steel constitutive relation and combining Displacement-Based Beam-Column （DBBC） element, Zero-Length Element with P-Delta Transformation, the models of a Reinforced Concrete （RC） column and two Steel Reinforced Concrete （SRC） columns are built, which intend to obtain the hysteretic curves. The comparison between the computed results and the experimental results shows that the fiber model of OpenSEES can reflect the characteristics of hysteresis loop under different axial compression ratios and simulate the nonlinear response of the SRC column well.
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