SMA-橡胶支座恢复力的实用模拟
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摘要
SMA-橡胶支座是一种可利用记忆合金超弹性滞回进行耗能的隔震装置。在概念设计的基础上,进行了SMA-橡胶支座的拟静力试验,证实了这一支座具有良好的隔震耗能特性。为了使SMA-橡胶支座的性能特点便于结构工程师所掌握,将线性最小二乘数据拟合技术和结构分析软件中常见的微分型恢复力模型用于模拟其水平力,数值计算所得到的恢复力-位移滞回曲线及支座性能参数值与试验结果吻合良好。可见,引入上述实用模拟方法有助于利用现有结构分析软件建立SMA-橡胶支座隔震单元,从而促进了这种隔震支座在实际工程中的应用。
SMA-rubber bearing is a type of seismic isolation device dissipating energy with hysteretic effect of superelasticity of shape memory alloy(SMA) material.Based on an isolator's concept design,a series of pseudo-static tests for a SMA-rubber bearing were conducted and its excellent seismic isolation and energy dissipation performances were verified with the test results.For structural engineers to gain the mastery of seismic isolation characteristics of SMA-rubber bearings,the linear least square data fitting technique and the differential restoring force model commonly known in structural analysis software were used to simulate horizontal force of an isolator.Then,its restoring force-displacement hysteresis loop and performance parameters were compared with those of the test data.It was found that the test results match closely with those obtained from the above-mentioned simulation.Thererfore,the proposed simulation method was helpful for establishing an SMA-rubber isolator element with the existing structural analysis software and application of SMA-based isolation bearings in engineering structures.
SMA-rubber bearing is a type of seismic isolation device dissipating energy with hysteretic effect of superelasticity of shape memory alloy(SMA) material.Based on an isolator's concept design,a series of pseudo-static tests for a SMA-rubber bearing were conducted and its excellent seismic isolation and energy dissipation performances were verified with the test results.For structural engineers to gain the mastery of seismic isolation characteristics of SMA-rubber bearings,the linear least square data fitting technique and the differential restoring force model commonly known in structural analysis software were used to simulate horizontal force of an isolator.Then,its restoring force-displacement hysteresis loop and performance parameters were compared with those of the test data.It was found that the test results match closely with those obtained from the above-mentioned simulation.Thererfore,the proposed simulation method was helpful for establishing an SMA-rubber isolator element with the existing structural analysis software and application of SMA-based isolation bearings in engineering structures.
引文
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[13]庄鹏,薛素铎,李彬双.SMA-橡胶支座滞回性能的理论模型[J].北京工业大学学报,2006,32(10):890-894.ZHUANG Peng,XUE Su-duo,LI Bin-shuang.Theoreticalmodel for hysteretic behavior of SMA-rubber bearings[J].Journal of Beijing University of Technology,2006,32(10):890-894.
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[16]北京金土木软件技术有限公司,中国建筑标准设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006.
[17]Wen Y K.Method for random vibration of hysteretic system[J].Journal of the Engineering Mechanics Division,1976,102:249-263.
[18]Wen Y K.Equivalent linearization for hysteretic system underrandom excitation[J].Journal of Applied Mechanics,1980,47(1):150-154.
[2]欧进萍.结构振动控制—主动、半主动和智能控制[M].北京:科学出版社,2003.
[3]Soong T T,Dargush G F,著.董平,译.结构工程中的被动消能系统[M].北京:科学出版社,2005.
[4]Dolce M,Cardone D,Marnetto R.Implementation andtesting of passive control devices based on shape memoryalloys[J].Earthquake Engineering and Structural Dynamics,2000,29:945-968.
[5]Han Y L,Li Q S,Li A Q,et al.Structural vibration controlby shape memory alloy damper[J].Earthquake Engineeringand Structural Dynamics,2003,32:483-494.
[6]DesRoches R,McCormick J,Delemont M.Cyclic propertiesof superelastic shape memory alloy wires and bars[J].Journal of Structural Engineering,2004,130(1):38-46.
[7]Dong J H,Cai C S,Oklei A M.Overview of potential andexisting applications of shape memory alloys in bridges[J].Journal of Bridge Engineering,2011,16(2):305-315.
[8]毛晨曦,李惠,欧进萍.形状记忆合金被动阻尼器及结构地震反应控制试验研究和分析[J].建筑结构学报,2005,26(3):38-44.MAO Chen-xi,LI Hui,OU Jin-ping.Experimental andanalytical inveatigations of shape memory alloy as passiveenergy dissipation device for seismic response recuction ofbuilding[J].Journal of Building Structures,2005,26(3):38-44.
[9]陈鑫,李爱群,左晓宝,等.新型形状记忆合金隔震支座的设计与分析[J].振动与冲击,2011,30(6):256-260.CHEN Xin,LI Ai-qun,ZUO Xiao-bao,et al.Design andstudy on novel shape memory alloy isolator[J].Journal ofVibration and Shock,2011,30(6):256-260.
[10]左晓宝,李爱群,黄镇,等.超弹性SMA复合阻尼器的计算模型及参数分析[J].振动工程学报,2005,18(2):161-165.ZUO Xiao-bao,LI Ai-qun,HUANG Zhen,et al.Mechanicalmodel and parameter analysis of superelastic SMA compounddamper[J].Journal of Vibration Eningeering,2005,18(2):161-165.
[11]吴东梅,刘树堂,刘智勇.SMA-滚动隔震火炬塔的地震反应分析[J].广州大学学报(自然科学版),2007,6(1):82-86.WU Dong-mei,LIU Shu-tang,LIU Zhi-yong.Seismicresponse analysis of torch tower with SMA-rolling bearings[J].Journal of Guangzhou University(Natural ScienceEdition),2007,6(1):82-86.
[12]庄鹏,薛素铎,李彬双.SMA-橡胶支座隔震系统的动力响应研究[J].振动与冲击,2006,25(3):85-89.ZHUANG Peng,XUE Su-duo,LI Bin-shuang.Dynamicresponses of a seismic isolation system using SMA-rubberbearing[J].Journal of Vibration and Shock,2006,25(3):85-89.
[13]庄鹏,薛素铎,李彬双.SMA-橡胶支座滞回性能的理论模型[J].北京工业大学学报,2006,32(10):890-894.ZHUANG Peng,XUE Su-duo,LI Bin-shuang.Theoreticalmodel for hysteretic behavior of SMA-rubber bearings[J].Journal of Beijing University of Technology,2006,32(10):890-894.
[14]Graesser E J,Cozzarelli F A.Shape memory alloys as newmaterials for aseismic isolation[J].Journal of EngineeringMechanics,1991,117(11):2590-2608.
[15]北京金土木软件技术有限公司,中国建筑标准设计研究院.ETABS中文版使用指南[M].北京:中国建筑工业出版社,2004.
[16]北京金土木软件技术有限公司,中国建筑标准设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006.
[17]Wen Y K.Method for random vibration of hysteretic system[J].Journal of the Engineering Mechanics Division,1976,102:249-263.
[18]Wen Y K.Equivalent linearization for hysteretic system underrandom excitation[J].Journal of Applied Mechanics,1980,47(1):150-154.
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