雙屈服點免斷裂屈曲約束支撐性能試驗與數(shù)值模擬*
萬金國1,2,楊凡3,李文峰1,苗啟松1,張艷霞3
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萬金國1,2,楊凡3,李文峰1,苗啟松1,張艷霞3（1 北京市建筑設計研究院有限公司， 北京 100045； 2 清華大學土木工程系， 北京100084； 3 北京建筑大學， 北京 100044）［摘要］提出一種具有雙屈服點并能防止因變形過大而發(fā)生斷裂的新型屈曲約束支撐，通過試驗研究，驗證了其傳力機制和耗能能力。采用ABAQUS軟件對試驗進行數(shù)值模擬，從數(shù)值角度對該型支撐的受力機理進行研究。采用工程設計中常用的SAP2000軟件中的非線性連接單元，對該屈曲約束支撐進行計算，將計算和試驗結(jié)果進行對比，為新型屈曲約束支撐在實際工程中的應用提供了計算工具。試驗結(jié)果表明，該型支撐具有良好的耗能能力和變形能力，計算結(jié)果能與試驗結(jié)果吻合較好。［關(guān)鍵詞］屈曲約束支撐； 雙屈服點； 滯回耗能； 試驗研究； 力學性能； 數(shù)值模擬中圖分類號：TU399；TU352.11 文獻標識碼：A 文章編號：1002-848X(2013)17-0105-04Experiment research and mechanical simulation of BRB with double yield points and non-fractureWan Jinguo1,2, Yang Fan3, Li Wenfeng1, Miao Qisong1, Zhang Yanxia3(1 Beijing Institute of Architectural Design, Beijing 100045, China; 2 Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 3 Beijing University of Civil Engineering and Architectural, Beijing 100044, China)Abstract: A new type of buckling restrained brace(BRB) is presented, which has double yield points and the feature of non-fracture when its deformation is too large. Its force transmission mechanism and energy dissipation capacity were verified by experiment. Numerical simulation was used to verify the force mechanism of this type of buckling restrained brace using ABAQUS program. Then in order to use this buckling restrained brace in practical engineering, the brace was calculated by SAP2000 program with the nonlinear link elements and the skeleton curve from experiment. The result of experiment shows that this type of brace has a good energy dissipation capacity and deformation capacity. The results of calculation are in good agreement with that of the experiment.Keywords: buckling restrained brace; double yield points; hysteretic energy; experiment research; simulation; mechanics*十一五科技支撐計劃項目（2009BAJ28B01）。作者簡介：萬金國，博士，工程師，Email:wanjinguo83@163.com。參考文獻［1］朱江. 防屈曲支撐體系的研究現(xiàn)狀及其應用［J］.沈陽大學學報,2010,22(2):35-38.［2］汪大綏,陳建興,包聯(lián)進，等.耗能減震支撐體系研究及其在世博中心工程中的應用［J］.建筑結(jié)構(gòu)學報, 2010,31(5): 117-123.［3］趙瑛. 防屈曲支撐框架設計理論研究［D］. 北京：清華大學,2009.［4］IWATA M, MURAI M. Buckling-restrained brace using steel mortar planks:performance evaluation as a hysteretic damper［J］. Earthquake Engineering and Structural Dynamics, 2006, 35(14):1807-1826.［5］GB 50011—2010 建筑抗震設計規(guī)范［S］.北京:中國建筑工業(yè)出版社,2010.［6］BLACK C, MAKRIS N, AIKEN I. Component testing, stability analysis and characterization of buckling-restrained unboned braces［R］. PEER Report, Pacific Earthquake Engineering Research Center College of Engineering, 2002.［7］FEMA450. Recommended provisions for seismic regulations for new buildings and other structures［S］. Washington: 2004.［8］莊茁,由小川,廖劍暉, 等. 基于ABAQUS的有限元分析和應用［M］. 北京:清華大學出版社,2009.［9］北京金土木軟件技術(shù)有限公司. SAP2000中文版使用指南［M］.北京:人民交通出版社,2008.
