抗震结构填充墙失效机理分析及倒塌数值模拟
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摘要
为更好了解抗震结构填充墙的工作机理,介绍了框架填充墙典型的面内失效模式,并对两层框架填充墙面外倒塌过程进行了模拟再现。研究发现,填充墙主要呈现5种面内失效模式:纯弯曲失效、水平滑移裂缝、对角斜裂缝、多层接缝处滑移失效和平行对角斜撑失效。通过有限元LS-DYNA分析软件对填充墙的面外倒塌过程进行模拟,结果表明,没有任何构造措施的框架填充墙,在罕遇地震作用下容易脱离框架出现倒塌现象,模拟结果和实际震害比较一致。因此,重视填充墙构造措施以防护填充墙的倒塌,对保障人员生命和财产的安全具有重要意义。
In order to investigate the working mechanisms of infilled frame,several typical in-plane failure modes were introduced and out-of-plane collapse process of a two-storey infilled frame was simulated.There were 5 types of in-plane failure modes for infilled frame,i.e.,pure bending moment failure,horizontal slip crack,diagonal crack,multi-layer joints slip failure and parallel diagonal bracing failure.Then,out-of-plane collapse process simulation of this infilled frame was carried out based on the LS-DYNA software.The results show that the infilled walls without any construction measures collapsed easily under rare earthquake.The simulated results were agreed with the actual earthquake damage.So,it is very significant to consider construction measures to prevent the collapse of infilled walls and ensure the safety of life and possession.
In order to investigate the working mechanisms of infilled frame,several typical in-plane failure modes were introduced and out-of-plane collapse process of a two-storey infilled frame was simulated.There were 5 types of in-plane failure modes for infilled frame,i.e.,pure bending moment failure,horizontal slip crack,diagonal crack,multi-layer joints slip failure and parallel diagonal bracing failure.Then,out-of-plane collapse process simulation of this infilled frame was carried out based on the LS-DYNA software.The results show that the infilled walls without any construction measures collapsed easily under rare earthquake.The simulated results were agreed with the actual earthquake damage.So,it is very significant to consider construction measures to prevent the collapse of infilled walls and ensure the safety of life and possession.
引文
[1]清华大学,西南交通大学,北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9. Civil and Structural Groups of Tsinghua University, Xinan Jiaotong University and Beijing Jiaotong University. Analysis on seismic damage of buildings in the Wenchuan earthquake[J].Journal of Building Structures, 2008,29(4):1-9.(in Chinese)
[2]杨伟,侯爽,欧进萍.从汶川地震分析填充墙对结构整体抗震能力的影响[J].大连理工大学学报, 2009,49(5):770-775. Yang Wei,Hou Shuang,Ou Jinping.Analysis of influence of structural global seismic capacity induced ??by infills subjected to Wenchuan earthquake[J]. Journal of Dalian University of Technology,2009,49 (5):770-775.(in Chinese)
[3]中华人民共和国住房和城乡建设部.GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010. Ministry of Construction of the People 's Republic of China.GB 50011—2010 Gode for Seismic design of building[S].Beijing:China Architecture and Building Press,2010.(in Chinese)
[4]Klingner,Bertero V V.Infilled frames in earthquake-resistant construction[R].Report EERC176-32. Earthquake Engineering Research Center,University of California,Berkeley,CA,1976.
[5]Bertero V V,Brokken S.Infills in seismic resistant building[J].Journal of Structural Engineering (ASCE),1983,109(6):1227-1361.
[6]Schmidt T.Experiments on the nonlinear behavior of masonry infilled reinforced concrete frames[J]. Darmstadt Concrete,Annual Journal on Concrete and Concrete Structures,1989,4:185-194.
[7]Mehrabi A B,Shing P B,Schuller M P,et al.Experimental evaluation of masonry-infilled R/C fames [J].Journal of Structural Engineering(ASCE ), 1996,122(3):228-237.
[8]杨伟,欧进萍.抗震结构填充墙性能的有限元模拟与分析[J].华南理工大学学报(自然科学版), 2010,38(7):140-144. Yang Wei,Ou Jinping.Finite Element Simulation and Analysis of Performance of Infill Walls of Aseismic Structures[J].Journal of South China University of Technology(Natural Science Edition),2010,38 (7):140-144.(in Chinese)
[9]中华人民共和国住房和城乡建设部.GB 50003—2001砌体结构设计规范[S].北京:中国建筑工业出版社,2002. Ministry of Construction of the People's Republic of China.GB 50003—2001 Code for design of masonry structures[S].Beijing:China Architecture and Building Press,2002.(in Chinese)
[2]杨伟,侯爽,欧进萍.从汶川地震分析填充墙对结构整体抗震能力的影响[J].大连理工大学学报, 2009,49(5):770-775. Yang Wei,Hou Shuang,Ou Jinping.Analysis of influence of structural global seismic capacity induced ??by infills subjected to Wenchuan earthquake[J]. Journal of Dalian University of Technology,2009,49 (5):770-775.(in Chinese)
[3]中华人民共和国住房和城乡建设部.GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010. Ministry of Construction of the People 's Republic of China.GB 50011—2010 Gode for Seismic design of building[S].Beijing:China Architecture and Building Press,2010.(in Chinese)
[4]Klingner,Bertero V V.Infilled frames in earthquake-resistant construction[R].Report EERC176-32. Earthquake Engineering Research Center,University of California,Berkeley,CA,1976.
[5]Bertero V V,Brokken S.Infills in seismic resistant building[J].Journal of Structural Engineering (ASCE),1983,109(6):1227-1361.
[6]Schmidt T.Experiments on the nonlinear behavior of masonry infilled reinforced concrete frames[J]. Darmstadt Concrete,Annual Journal on Concrete and Concrete Structures,1989,4:185-194.
[7]Mehrabi A B,Shing P B,Schuller M P,et al.Experimental evaluation of masonry-infilled R/C fames [J].Journal of Structural Engineering(ASCE ), 1996,122(3):228-237.
[8]杨伟,欧进萍.抗震结构填充墙性能的有限元模拟与分析[J].华南理工大学学报(自然科学版), 2010,38(7):140-144. Yang Wei,Ou Jinping.Finite Element Simulation and Analysis of Performance of Infill Walls of Aseismic Structures[J].Journal of South China University of Technology(Natural Science Edition),2010,38 (7):140-144.(in Chinese)
[9]中华人民共和国住房和城乡建设部.GB 50003—2001砌体结构设计规范[S].北京:中国建筑工业出版社,2002. Ministry of Construction of the People's Republic of China.GB 50003—2001 Code for design of masonry structures[S].Beijing:China Architecture and Building Press,2002.(in Chinese)
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