(1 东北大学资源与土木工程学院，沈阳 110004； 2 大连理工大学土木水利学院，大连 116024)

［摘要］采用RFPA3D(Realistic Failure Process Analysis)软件对轴心受压的矩形钢管混凝土短柱进行了数值模拟。分析了极限承载力与钢管混凝土柱长度的关系以及混凝土截面面积对极限承载力的影响等问题。研究结果表明，钢管混凝土柱的极限承载力随着柱长度的增加而降低，随着截面面积的增加而增加。在钢管混凝土承载力方面，数值模拟结果与试验结果比较吻合。数值模拟的特色在于再现了核心混凝土的变形、损伤与破坏过程。数值模拟结果证明了RFPA3D软件模拟钢管混凝土结构的有效性，其模拟结果可为工程设计提供参考。

［关键词］钢管混凝土柱；承载力；破坏过程；非均匀性

Numerical simulation on failure process of short concrete-filled rectangular steel tube columns under axial compressive loading

Zhu Wancheng¹, Ling Li¹, Tang Chun’an², Yu Qinglei¹, Zhang Yongbin²(1 School of Resources & Civil Engineering, Northeastern University, Shenyang 110004, China; 2 School of Civil & Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China)

Abstract:Realistic Failure Process Analysis (RFPA3D) software is used to simulate the short concrete-filled rectangular steel tube columns under axial compressive loading. The relationship between the ultimate bearing capacity and the length of the columns is presented, and the effect of cross-section area is also considered in the present simulations. The results of numerical simulation indicate that the ultimate bearing capacity is adversely affected by the length of the columns. As regards the ultimate bearing capacity, the simulation results agree well with the experiment observation. The results indicate that RFPA3D software is effectively in capturing the failure characteristics of the concrete-filled rectangular steel tube columns, denoting RFPA3D could be used as numerical tool to evaluate the design of concrete-filled rectangular steel tube columns.

Keywords:concrete-filled steel tube column; bearing capacity; failure process; heterogeneity

*国家自然科学基金项目(50874024，50934006和50904013)；新世纪优秀人才支持计划资助项目(NCET-06-0291)；辽宁省自然科学基金项目(20082027)；教育部留学回国人员科研启动基金资助项目。

作者简介：朱万成，博士，教授，Email：zhuwancheng@mail.neu.edu.cn。

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