基于IDA方法的框排架结构抗震性能分析
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摘要
基于逐步增量弹塑性时程方法,选择了10条地震波对火电厂主厂房框排架结构进行非线性时程分析,得到了相关指标的IDA曲线簇,并进行统计分析,最终得到了以概率为基础的框排架各层以及整体IDA曲线,以此对抗震性能进行评价.主厂房框排架结构抗震能力具有较大的富余度,但煤斗大梁处是结构的薄弱环节,设计时应注意加强.
the main powerhouse belongs to frame-bent structure style,is of irregular shape,complicated force paths.In strong earthquake,it easily deforms and even collapses to cause much damage.Therefore,the seismic capability must be known.According to incremental dynamical analysis method,10 earthquake waves are chosen in nonlinear time-history analysis of frame-bent structure.Through statistical analysis of IDA curves obtained,the IDA curve based on the probability of each floor and the whole structure can be obtained to make a judgment for the performance.Seismic capability of main powerhouse is more than demand,but its coal scuttle beam is vulnerable,strengthening is needed in design process.
the main powerhouse belongs to frame-bent structure style,is of irregular shape,complicated force paths.In strong earthquake,it easily deforms and even collapses to cause much damage.Therefore,the seismic capability must be known.According to incremental dynamical analysis method,10 earthquake waves are chosen in nonlinear time-history analysis of frame-bent structure.Through statistical analysis of IDA curves obtained,the IDA curve based on the probability of each floor and the whole structure can be obtained to make a judgment for the performance.Seismic capability of main powerhouse is more than demand,but its coal scuttle beam is vulnerable,strengthening is needed in design process.
引文
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[3]马千里,叶列平,陆新征,等.采用逐步增量弹塑性时程方法对RC框架结构推覆分析侧力模式的研究[J].建筑结构学报,2008,38(2):132-140.MA Qian-li,YE Lie-ping,LU Xin-zheng,et al.Study on lateral load patterns of pushover analysis using incremental dynamical analysis for RC frame structures[J].Journal of Building Structures,2008,38(2):132-140.
[4]VAMVATSIKOS D,CORNELLl C A.Incremental dynamic analysis[J].Earthquake Engineering and Structural Dynamics,2002,31(3):491-514.
[5]杨成.结构动力分析在基于性能的抗震工程中的应用[D].成都:西南交通大学,2004.YANG Cheng.Structural Dynamics Analysis in Performance-based Earthquake Engineering[D].Chengdu:Southwest Jiaotong University,2004.
[6]李谦.增量动力分析方法的研究及其应用[D].西安:西安建筑科技大学,2011.LI Qian.Study and application of incremental dynamical analysis method[D].Xi′an:Xi′an University of Architecture and Technology,2011.
[7]吴巧云.基于性能的钢筋混凝土框架结构抗震性能评估[D].武汉:华中科技大学,2011.WU Qiao-yun.Performance based seismic Performance evaluation of Reinforced concrete frame structure[D].Wuhan:Huazhong University of Science and Technology,2011.
[8]汪梦甫,曹秀娟,孙文.增量动力分析方法的改进及其在高层混合结构地震危害性评估中的应用[J].工程抗震与加固改造,2010,32(1):104-109.WANG Meng-fu,CAO Xiu-juan,SUN Wen.Incremental Dynamic Analysis Applied to Seismic Risk Assessment of Hybrid Structure[J].Earthquake Resistant Engineering and Retrofitting,2010,32(1):104-109.
[9]卜一,吕西林,周颖,等.采用增量动力分析方法确定高层混合结构的性能水准[J].结构工程师,2009,25(2):77-84.BU Yi,LXi-lin,ZHOU Ying,et al.Studies on the Multi-Levels of Hybrid Structures Using Incremental Dynamic Analysis[J].Structural Engineers,2009,25(2):77-84.
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