填充墙失效可控的结构整体抗震能力提升方法
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摘要
结构失效模式对应结构整体抗震能力,结构失效时所对应的最小地震作用作为结构的整体抗震能力。通过推覆分析(Pushover)找到结构的失效模式,从而为布置失效填充墙提供信息,通过布置失效填充墙,可改变并消除原有结构的最弱失效模式,从而提高结构的整体抗震能力;通过增量动力时程分析,可最终确定失效填充墙的最佳布置方案及结构的整体抗震能力指标,但填充墙的大量破坏会影响到结构的使用功能。通过在梁下部和填充墙顶部之间布置铅阻尼器既可有效地保护失效填充墙,又能使结构的整体抗震能力得以提高。算例说明了本文提出的分析方法的先进性和可行性,研究结果表明,考虑失效填充墙的作用能够使结构的整体抗震能力得到提高,铅阻尼器能够使失效填充墙的破坏得到有效控制。
The seismic capacity of building is corresponding to the weakest failure mode of building.The minimum earthquake action,under which structure arises the weakest failure mode,is called the global seismic capacity(GSC) of structure.Pushover analysis was carried out to find the failure mechanism of structure,which offered the information for placing allowed failure of infills(AFIs).Then,the weakest failure mode was eliminated for placing AFIs and GSC of structure was improved in the end.The optimum placing plan of AFIs and GSC index can be both obtained due to lots of incremental dynamic analysis(IDA).However,damage of AFIs would cause function loss of building.Shearing lead damper was then adopted to protect AFIs from immediately damage.Also,the GSC of structure was improved at the same time.The example shows that this method is advanced and feasible.The results indicate that GSC of infilled frames was greatly improved by considering the function of AFIs,and the failure of AFIs was controlled by using shearing lead damper.
The seismic capacity of building is corresponding to the weakest failure mode of building.The minimum earthquake action,under which structure arises the weakest failure mode,is called the global seismic capacity(GSC) of structure.Pushover analysis was carried out to find the failure mechanism of structure,which offered the information for placing allowed failure of infills(AFIs).Then,the weakest failure mode was eliminated for placing AFIs and GSC of structure was improved in the end.The optimum placing plan of AFIs and GSC index can be both obtained due to lots of incremental dynamic analysis(IDA).However,damage of AFIs would cause function loss of building.Shearing lead damper was then adopted to protect AFIs from immediately damage.Also,the GSC of structure was improved at the same time.The example shows that this method is advanced and feasible.The results indicate that GSC of infilled frames was greatly improved by considering the function of AFIs,and the failure of AFIs was controlled by using shearing lead damper.
引文
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[15]北京金土木软件技术有限公司,中国建筑标准设计院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006.
[16]MADAN A,REINHORN A M,MANDER J B,et al.Modeling of masonry infill panels for structural analysis[J].Journal of Structural Engineering,1997,100(3):1295-1302.
[2]黄靓,施楚贤,熊辉.带砌体填充墙结构在地震作用下的安全性质疑[J].建筑结构,2005,35(3):57-65.
[3]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.
[4]侯爽,杨伟.汶川地震都江堰市填充墙震害分析[J].大连理工大学学报,2009,49(5):754-757.
[5]朱荣华,沈聚敏.砖填充墙钢筋混凝土框架拟动力地震反应试验及理论分析[J].建筑结构学报,1996,17(4):27-34.
[6]段宇博,欧进萍.基于可靠度约束的高层建筑结构优化设计[J].自然灾害学报,1995,4(S1):57-63.
[7]叶燎原,潘文.结构静力弹塑性分析(push-over)的原理和计算实例[J].建筑结构学报,2000,21(1):37-43.
[8]VAMVATSIKOS D,COMELL C A.Incremental dynamicanalysis[J].Earthquake Engineering&StructuralDynamics,2002,31(3):491-514.
[9]周云,周福霖,邓雪松.铅阻尼器的研究与应用[J].世界地震工程,1999,15(1):53-61.
[10]彭凌云,闫维明,何浩祥.板式剪切型阻尼器的试验研究及有限元模拟[J].振动与冲击,2010,29(1):184-187.
[11]李冀龙,欧进萍.铅剪切阻尼器的阻尼力模型与设计[J].工程力学,2006,23(4):67-73.
[12]周云,吴从晓,邓雪松.铅粘弹性阻尼器的开发、研究与应用[J].工程力学,2009,26(SⅡ):80-90.
[13]刘猛.新型铅阻尼器与预应力装配式框架节点抗震性能研究[D].北京:北京工业大学,2008.
[14]POLYAKOV S V.On the interactions between masonryfiller walls and enclosing frame when loaded in the planeof the wall[R].Moscow:Translations in EarthquakeEngineering Research Institute,1956:125.
[15]北京金土木软件技术有限公司,中国建筑标准设计院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006.
[16]MADAN A,REINHORN A M,MANDER J B,et al.Modeling of masonry infill panels for structural analysis[J].Journal of Structural Engineering,1997,100(3):1295-1302.
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