串联隔震结构震损倒塌动态模型分析
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摘要
建立了叠层橡胶隔震垫与地下室悬臂RC柱组成的串联隔震结构的有限元分析模型,编写了利用MSC.MARC软件生死单元二次开发UACTIVE程序来模拟隔震垫的失效,并分析了远场多维地震激励下不同长细比悬臂柱柱顶加连梁对结构响应的影响,同时分析了设置阻尼器控制隔震层位移后的结构地震响应。分析表明:通过生死单元二次开发程序可以有效地模拟隔震垫破坏;实际工程中常规的长细比悬臂柱柱顶加连梁对串联隔震结构的响应影响微小;隔震层增设非线性阻尼器可以控制位移且不影响多遇地震下的隔震效果。
Analysis model of the serial isolation structure is established,which consists of laminated rubber bearing(LRB) mounted on top of basement column.User subroutine of MSC.MARC to simulate LRB damage is written.The influence of link beam which on top of basement column with different slenderness ratio under near-fault earthquakes is analyzed,and seismic response of the serial isolation structure with damper in isolation layer is analyzed.Analysis shows that the isolation layer damage preferably simulates through wrote user subroutine birth-death element.The link beam to the influence of structural response is minimal in general engineering.When nonlinear damper is installed in the isolation layer,not only be good for effectively reduce displacement,but as well not influence isolation effect of the serial isolation structure under frequent earthquakes.
Analysis model of the serial isolation structure is established,which consists of laminated rubber bearing(LRB) mounted on top of basement column.User subroutine of MSC.MARC to simulate LRB damage is written.The influence of link beam which on top of basement column with different slenderness ratio under near-fault earthquakes is analyzed,and seismic response of the serial isolation structure with damper in isolation layer is analyzed.Analysis shows that the isolation layer damage preferably simulates through wrote user subroutine birth-death element.The link beam to the influence of structural response is minimal in general engineering.When nonlinear damper is installed in the isolation layer,not only be good for effectively reduce displacement,but as well not influence isolation effect of the serial isolation structure under frequent earthquakes.
引文
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[2]李慧,姚云龙,杜永峰,党育,韩建平.叠层橡胶支座与柱串联体系动力失稳特性探讨[J].世界地震工程,2005,21(1):18～23Li Hui,Yao Yun-long,Du Yong-feng.et al.Discussionon Dynamic Instability Behavior of Serial System ofLaminated Rubber Bearing with Column[J].WorldInformation on Earthquake Engineering,2005,21(1):18～23(in Chinese)
[3]杜永峰,李慧.叠层橡胶垫与RC柱串联隔震体系的随机屈曲分析[J].防灾减灾工程学报,2010,30(4):16～21Du Yong-feng,Li Hui.Stochastic Buckling Analysis forthe Serial Isolation System of Laminated RubberBearings and RC Column[J].Journal of DisasterPrevention and Mitigation Engineering,2010,30(4):16～21(in Chinese)
[4]杜永峰,林治丹.双向水平地震作用下串联隔震结构的振动控制[J].工程抗震与加固改造,2010,32(4):32～37Du Yong-feng,Lin Zhi-dan,Vibration Control forSerially Connected Isolated Structures Subject to Two-directional Horizontal Earthquake[J].EarthquakeResistant Engineering and Retrofitting,2010,32(4):32～37(in Chinese)
[5]刘启方,金星.近断层地震动的基本特征[J].地震工程与工程振动,2006,26(1):1～9Liu Qi-fang,Jin Xing.Basic Characteristics of Near-fault Ground Motion[J].Earthquake Engineering andEngineering Vibration.2006,26(1):1～9(inChinese)
[6]杨迪雄,赵岩,李刚.近断层地震动运动特征对长周期结构地震响应的影响分析[J].防灾减灾工程学报,2007,27(2):133～140Yang Di-xiong;Zhao Yan;Li Gang.Influence Analysisof Motion Characteristics of Near-fault Ground Motionson Seismic Responses of Long-period Structures[J].Journal of Disaster Prevention and MitigationEngineering,2007,27(2):133～140(in Chinese)
[7]陈火红,杨剑,薛小香,王鹏波.新编Marc有限元实例教程[M].北京:机械工业出版社,2007Chen Huo-hong,Yang Jian,Xue Xiao-xiang,WangPeng-bo.New Marc Finite Element Examples Tutorial[M].Beijing:China Machine Press,2007(in Chinese)
[8]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析[M].北京:中国建筑工业出版社,2009Lu Xin-zheng,Ye Lie-ping,Miao Zhi-wei.Elasto-plastic Analysis of Buildings Against Earthquake[M].Beijing:China Architecture and Building Press,2009(in Chinese)
[9]陆新征,李易,叶列平,马一飞.钢筋混凝土框架结构抗连续倒塌设计方法的研究[J].工程力学,2008,25(Sup.2):150～157Lu Xin-zheng,Li Yi,Ye Lie-ping,Ma Yi-fei.Study onDesign Method to Resist Progressive Collapse forReinforced Concrete Frames[J].EngineeringMechanics,2008,25(Sup.2):150～157(in Chinese)
[10]陆新征,缪志伟,江见鲸,叶列平.静力和动力荷载作用下混凝土高层结构的倒塌模拟[J].山西地震,2006,126(2):7～11Lu Xin-zheng,Miao Zhi-wei,Jiang Jian-jing,Ye Lie-ping.Collapse Simulation of High-Rise Structure ofConcrete under the Action of Static and Dynamic Load[J].Earthquake Research in Shanxi,2006,126(2):7～11(in Chinese)
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