钢筋混凝土框架结构侧向倒塌地震易损性分析
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摘要
为研究钢筋混凝土框架结构在地震作用下的侧向倒塌易损性,采用多地震动增量动力分析方法,用FEMA准则和结构有限元计算失稳作为结构侧向倒塌能力点的确定准则,分析得到一栋5层3跨钢筋混凝土框架结构的侧向倒塌易损性曲线.结果表明:FEMA准则对结构侧向倒塌定义偏于保守.在大震作用下,结构倒塌风险较小.
To study the lateral seismic collapse fragility of RC frame structures,multi-record incremental dynamic analysis method is utilized to get the lateral seismic collapse fragility curves of a three-bay and five-storey RC frame building,in which the FEMA-rule and computational non-convergence are taken as a rule of lateral collapse of structures.The results demonstrate that the FEMA-rule is conservative to determine lateral collapse.Under the major earthquake,the structural collapse risk is limited.
To study the lateral seismic collapse fragility of RC frame structures,multi-record incremental dynamic analysis method is utilized to get the lateral seismic collapse fragility curves of a three-bay and five-storey RC frame building,in which the FEMA-rule and computational non-convergence are taken as a rule of lateral collapse of structures.The results demonstrate that the FEMA-rule is conservative to determine lateral collapse.Under the major earthquake,the structural collapse risk is limited.
引文
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[2]Federal Emergency Management Agency.Recommendedseismic design criteria for new steel moment-framebuildings,FEMA350[R].Washington,DC:FederalEmergency Management Agency,2000.
[3]ZAREIAN F.Simplified performance-based earthquakeengineering[D].San Francisco:Stanford University,2006.
[4]ZAREIAN F,KRAWINKLER H.Assessment of proba-bility of collapse and design for collapse safety[J].Earthquake Engineering and Structural Dynamics,2007,36(13):1901-1914.
[5]LIEL A B,HASELTON C B,DEIERLEIN G G,et al.Incorporating modeling uncertainties in the assessment ofseismic collapse risk of buildings[J].Structural Safe-ty,2009,31(2):197-211.
[6]陆新征,叶列平.基于IDA的结构抗地震倒塌能力研究[J].工程抗震与加固改造,2010,32(1):13-18.
[7]唐代远,陆新征,叶列平,等.柱轴压比对我国RC框架结构抗地震倒塌能力的影响[C]//北京市建筑设计研究院.第十二届高层建筑抗震技术交流会论文集.北京:中国建筑学会抗震防灾分会,高层建筑抗震专业委员会,2009:35-45.
[8]VAMVATSIKOS D,CORNELL C A.Incremental dy-namic analysis[J].Earthquake Engineering and Struc-tural Dynamics,2002,31(3):491-514.
[9]GB 50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[10]吕大刚,于晓辉,王光远.基于单地震动记录IDA方法的结构倒塌分析[J].地震工程与工程振动,2009,29(6):33-39.
[11]MCKENNA F,FENVES G L,SCOTT M H.Open sys-tem for earthquake engineering simulation[R].Uni-versity of California at Berkeley:Pacific EarthquakeEngineering Research Center,2008.
[12]MANDER J B,PRIESTLEY M J,PARK R.Theoreti-cal stress-strain model for confined concrete[J].ASCE/Journal of Structural Engineering,1988,114(8):1804-1826.
[13]陈志恒.钢筋混凝土框架结构的倒塌失效模式、风险与鲁棒性分析[D].哈尔滨:哈尔滨工业大学,2009.
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