（天津大学建筑工程学院，天津 300072）

[摘要] 本文通过混凝土的单轴重复加卸载应力应变曲线对混凝土的刚度退化现象进行解释并对几种混凝土损伤塑性模型进行了比较分析，在此基础上为混凝土损伤塑性模型提出了修正的损伤因子计算原理。使用ABAQUS有限元软件采用包括本文提出的修正模型在内的三种混凝土损伤塑性模型对往复荷载作用下钢筋混凝土梁柱节点进行非线性分析，与实验结果对比分析验证了修正混凝土损伤塑性模型的有效性。

[关键词] 混凝土损伤塑性；刚度退化；非线性分析；有效性验证

中图分类号：TU528.1      文献标识码：A

Modified damage factor for concrete damaged plasticity model and its validation verification

He Xiaoyong，Liu Jie

(Building Engineering School of Tianjin University, Tianjin 300072, China)

Abstract：Based on the stress-strain curve for concrete under cyclic uniaxial loading, this article made an clear explanation of stiffness degradation of concrete and summarized four types of classic models of concrete damage factor and at last put forward an analysis principle of modified damage factor for concrete damaged plasticity. Finally, this article made nonlinear analysis of reinforced concrete beam-column joint under reciprocating load by adopting three types of damage factor of concrete damaged plasticity model including the modified one in ABAQUS. The validation of modified damage factor was verified by comparison with other classic models and experimental data.

Keywords：concrete damaged plasticity；stiffness degradation；nonlinear analysis；validation verification

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