纤维梁单元模型中钢筋模拟方法对比研究
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閤东东1,2，万金国1,2，潘鹏1，李文峰2，苗启松2（1 清华大学土木工程系，北京 100084； 2 北京市建筑设计研究院有限公司，北京 100045）［摘要］对ABAQUS纤维梁单元模型中钢筋的模拟方法进行对比，并对钢筋混凝土框架结构隐式和显式弹塑性时程分析结果进行比较。钢筋混凝土纤维梁单元中钢筋可以采用钢筋纤维法和组合单元法两种方法进行模拟，对这两种钢筋模拟方法进行了详细对比分析，并对隐式动力时程分析和显式动力时程分析结果进行了比较。结果表明，两种钢筋模拟方法可以得到相近的时程分析结果，编制的显式混凝土单轴动力本构是正确的。［关键词］纤维梁单元；隐式动力弹塑性分析；显式动力弹塑性分析；单轴本构中图分类号：TU375 文献标识码：A 文章编号：1002-848X(2013)02-0060-03Comparative study on simulation methods of steel bar in fiber beam element modelGe Dongdong1,2, Wan Jinguo1,2, Pan Peng1, Li Wenfeng2, Miao Qisong2(1 Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 2 Beijing Institute of Architectural Design, Beijing 100045, China)Abstract: Simulation methods of steel bar in fiber beam element model were compared on the basis of ABAQUS, and a contrast analysis was also carried out between time history results obtained from implicit and explicit dynamic analysis methods respectively, and a reinforced concrete frame structure subjected to earthquake was taken as an example. Steel fiber method and combined finite element method can be applied to model the reinforced concrete beam element. The results obtained from the two methods, and also from implicit and explicit dynamic analysis methods were compared in detail, respectively. It is demonstrated that the results based on the two simulation methods of steel bar are consistent with each other, and the uniaxial constitutive model of concrete in the case of explicit dynamic analysis is correct.Keywords: fiber beam element; implicit dynamic elasto plastic analysis; explicit dynamic elasto plastic analysis; uniaxial constitutive参考文献［1］ SILVIA MAZZONI, FRANK MCKENNA, MICHAEL H SCOTT, et al. Open system for earthquake engineering simulation user commandlanguage manual［M］. Berkeley:University of California, 2006.［2］ GRAHAM H POWELL. A state of the art educational event performance based design using nonlinear analysis［R］. Computers and Structures Inc., 2007.［3］ 汪训流, 陆新征, 叶列平. 往复荷载下钢筋混凝土柱受力性能的数值模拟［J］. 工程力学, 2007, 24(12): 76-81.［4］ 叶列平, 陆新征, 马千里，等. 混凝土结构抗震非线性分析模型、方法及算例［J］. 工程力学, 2006, 23(SⅡ): 131-140.［5］ 陆新征, 叶列平, 缪志伟. 建筑抗震弹塑性分析原理、模型与在ABAQUS, MSC.MARC和SAP2000上的实践［M］. 北京: 中国建筑工业出版社, 2009.［6］ 李承铭, 李志山, 王国俭. 混凝土梁柱构件基于截面纤维模型的弹塑性分析［J］. 建筑结构, 2007, 37(12): 33-35.［7］ 潘鹏，钱稼茹，周怡斌，等. 上海科技宇航有限公司大修机库弹塑性时程分析［J］.建筑结构, 2009,39(10): 15-18.［8］ 曲哲. 摇摆墙框架结构抗震损伤机制控制及设计方法研究［D］. 北京: 清华大学, 2010.［9］ 聂利英, 郭青伟, 李硕娇. 2种纤维塑性梁单元特性 ［J］. 河海大学学报：自然科学版，2010, 38(4): 442-446.［10］ 聂利英, 李建中, 范立础. 弹塑性纤维梁柱单元及其单元参数分析［J］. 工程力学, 2004, 21(3): 15-20.［11］ 李正, 李忠献. 基于梁柱单元的钢筋混凝土桥墩地震损伤分析［J］. 天津大学学报, 2011, 44(3): 189-195.［12］ ABAQUS, Inc. ABAQUS analysis user’s manual［M］. 2006.
