纖維梁單元模型中鋼筋模擬方法對比研究
閤東東1,2，萬金國1,2，潘鵬1，李文峰2，苗啟松2
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閤東東1,2，萬金國1,2，潘鵬1，李文峰2，苗啟松2（1 清華大學土木工程系，北京 100084； 2 北京市建筑設計研究院有限公司，北京 100045）［摘要］對ABAQUS纖維梁單元模型中鋼筋的模擬方法進行對比，并對鋼筋混凝土框架結(jié)構(gòu)隱式和顯式彈塑性時程分析結(jié)果進行比較。鋼筋混凝土纖維梁單元中鋼筋可以采用鋼筋纖維法和組合單元法兩種方法進行模擬，對這兩種鋼筋模擬方法進行了詳細對比分析，并對隱式動力時程分析和顯式動力時程分析結(jié)果進行了比較。結(jié)果表明，兩種鋼筋模擬方法可以得到相近的時程分析結(jié)果，編制的顯式混凝土單軸動力本構(gòu)是正確的。［關鍵詞］纖維梁單元；隱式動力彈塑性分析；顯式動力彈塑性分析；單軸本構(gòu)中圖分類號：TU375 文獻標識碼：A 文章編號：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參考文獻［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］ 汪訓流, 陸新征, 葉列平. 往復荷載下鋼筋混凝土柱受力性能的數(shù)值模擬［J］. 工程力學, 2007, 24(12): 76-81.［4］ 葉列平, 陸新征, 馬千里，等. 混凝土結(jié)構(gòu)抗震非線性分析模型、方法及算例［J］. 工程力學, 2006, 23(SⅡ): 131-140.［5］ 陸新征, 葉列平, 繆志偉. 建筑抗震彈塑性分析原理、模型與在ABAQUS, MSC.MARC和SAP2000上的實踐［M］. 北京: 中國建筑工業(yè)出版社, 2009.［6］ 李承銘, 李志山, 王國儉. 混凝土梁柱構(gòu)件基于截面纖維模型的彈塑性分析［J］. 建筑結(jié)構(gòu), 2007, 37(12): 33-35.［7］ 潘鵬，錢稼茹，周怡斌，等. 上海科技宇航有限公司大修機庫彈塑性時程分析［J］.建筑結(jié)構(gòu), 2009,39(10): 15-18.［8］ 曲哲. 搖擺墻框架結(jié)構(gòu)抗震損傷機制控制及設計方法研究［D］. 北京: 清華大學, 2010.［9］ 聶利英, 郭青偉, 李碩嬌. 2種纖維塑性梁單元特性 ［J］. 河海大學學報：自然科學版，2010, 38(4): 442-446.［10］ 聶利英, 李建中, 范立礎. 彈塑性纖維梁柱單元及其單元參數(shù)分析［J］. 工程力學, 2004, 21(3): 15-20.［11］ 李正, 李忠獻. 基于梁柱單元的鋼筋混凝土橋墩地震損傷分析［J］. 天津大學學報, 2011, 44(3): 189-195.［12］ ABAQUS, Inc. ABAQUS analysis user’s manual［M］. 2006.
