大尺寸隔震橡胶支座内部钢板最大应力的影响因素分析(英文)
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摘要
采用有限元方法对直径为1 500 mm隔震橡胶支座内部钢板最大应力影响因素进行分析研究,提出了相应修正计算公式.影响因素包括支座内部孔洞的大小、单层内部橡胶与钢板厚度之比(tr/ts)、内部橡胶剪切模量(G)、支座第1形状系数(S1)以及支座外保护层厚度.研究对象包括建筑及桥梁用隔震橡胶支座,荷载方法采用单向竖向加载及压剪荷载.研究结果表明,支座内部孔洞大小、tr/ts、S1对内部钢板最大应力影响较大,而G值及保护层厚度对其影响很小.提出了考虑S1影响、用以计算支座内部钢板最大应力的修正理论计算公式,并与有限元计算结果进行了对比,对比结果表明,无论是S1大的建筑隔震橡胶支座还是S1小的桥梁隔震橡胶支座,两者吻合较好.
In this paper,some factors affecting the maximum stress of inner steel plate of elastomeric isolator with big diameter of 1 500 mm are analyzed by FEA,and a modified prediction formula for the maximum stress of inner steel plate is proposed.These factors include size of hole,ratio of tr/ts,shear modulus of inner rubber G,the first shape factor S1,thickness of cover rubber.The isolators include those which are to be used in buildings or bridges,loading condition includes single compress and press-shear load.Research results show that size of hole,ratio of tr/ts and S1 have a little effect on the maximum stress of inner steel plate,but shear modulus of inner rubber,and thickness of cover rubber hardly have effect.The modified prediction formula considering S1 effect shows a good correspondence with the FEA results for isolators which are generally to be used in buildings or bridges.
In this paper,some factors affecting the maximum stress of inner steel plate of elastomeric isolator with big diameter of 1 500 mm are analyzed by FEA,and a modified prediction formula for the maximum stress of inner steel plate is proposed.These factors include size of hole,ratio of tr/ts,shear modulus of inner rubber G,the first shape factor S1,thickness of cover rubber.The isolators include those which are to be used in buildings or bridges,loading condition includes single compress and press-shear load.Research results show that size of hole,ratio of tr/ts and S1 have a little effect on the maximum stress of inner steel plate,but shear modulus of inner rubber,and thickness of cover rubber hardly have effect.The modified prediction formula considering S1 effect shows a good correspondence with the FEA results for isolators which are generally to be used in buildings or bridges.
引文
[1]ZHOU Fu-lin.Earthquake energy absorbing control on engineering structure[M].Beijing:Seismological Press,1997.(in Chinese)
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[10]LUDI J B.Finite element modeling of elastomeric seismic bearings[D].Irvine:University of California,1993.
[11]ISO22762.2Rubber bearings:Part2:Elastomeric seismic protection isolators for bridges[S].
[12]ISO22762.3(modified version).Rubber bearings:Part3:Elastomeric seismic protection isolators for buildings[S].
[13]CHEN Huo-hong,YANG Jian,XUE Xiao-xiang,et al.Marc finite training manual with practice engineering[M].China Machine Press,2007.(in Chinese)
[14]MINEO T,HIDEYUKI T,RYUICHI T.Finite-element analysis of laminated rubber bearing used in base-isolation system[J].Rubber Chemistry and Technology,1992,65(1):46-62.
[1]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[2]刘文光,杨巧荣,周福霖.建筑用铅芯橡胶隔震支座温度性能研究[J].世界地震工程,2003,19(2):39-44.
[3]何文福,刘文光,杨彦飞,等.橡胶支座水平剪切弹塑性能力学试验研究[J].兰州理工大学学报,2007,33(3):120-123.
[4]韩强,杜修力,刘文光,等.橡胶隔震支座拉伸性能试验研究[J].北京工业大学学报,2006,32(3):208-212.
[5]刘文光,杨巧荣,周福霖.天然橡胶隔震支座温度相关性试验研究[J].广州大学学报:自然科学版,2002,1(6):51-56.
[6]杨巧荣.庄学真,刘文光,等.夹层橡胶隔震支座全刚性性能、回转性能及高压缩应力性能试验研究[J].地震工程与工程振动,2000,20(4):118-125.
[13]陈火红,杨剑,薛小香,等.Marc有限元实例教程[M].北京:机械工业出版社,2007.
[2]LIU Wen-guang,YANG Qiao-rong,ZHOU Fu-lin.Temperature properties of lead rubber bearings for building[J].WorldEarthquake Engineering,2003,19(2):39-44.(in Chinese)
[3]HE Wen-fu,LIU Wen-guang,YANG Yan-fei,et al.Experimental investigation of elastic-plastic mechanical behaviour of horizontal shearing of rubber bearings[J].Journal of Lanzhou University of Technology,2007,33(3):120-123.(in Chi-nese)
[4]HAN Qiang,DU Xiu-li,LIU Wen-guang,et al.Experimental research on tension property of rubber isolators[J].Journal of Beijing University of Technology,2006,32(3):208-212.(in Chinese)
[5]LIU Wen-guang,YANG Qiao-rong,ZHOU Fu-lin.Temperature properties of natural rubber bearings[J].Journal of Guang-zhou University:Natural Science Edition,2002,1(6):51-56.(in Chinese)
[6]YANG Qiao-rong,ZHUANG Xue-zhen,LIU Wen-guang,et al.Entire-stiffness,rotational stiffness,and property of high compressive stress of rubber bearings[J].Earthquake Engineering and Engineering Vibration,2000,20(4):118-125.(in Chinese)
[7]SIMO J C,KELLY J M.The analysis of multilayer elastomeric bearing[J].Journal of Applied Mechanics,1984,51(6):256-262.
[8]ROEDER C W,STANTON J F,TAYLOR A W.National cooperative highway research program report298performance of elastomeric bearings[C]∥Transformation Research Board,National Research Council,1987.
[9]MINEO T,KEIKO M.Maximum stress of innerlayer steel plates in elastomeric isolator[J].The American Society of Me-chanical Engineers,1996,341:55-62.
[10]LUDI J B.Finite element modeling of elastomeric seismic bearings[D].Irvine:University of California,1993.
[11]ISO22762.2Rubber bearings:Part2:Elastomeric seismic protection isolators for bridges[S].
[12]ISO22762.3(modified version).Rubber bearings:Part3:Elastomeric seismic protection isolators for buildings[S].
[13]CHEN Huo-hong,YANG Jian,XUE Xiao-xiang,et al.Marc finite training manual with practice engineering[M].China Machine Press,2007.(in Chinese)
[14]MINEO T,HIDEYUKI T,RYUICHI T.Finite-element analysis of laminated rubber bearing used in base-isolation system[J].Rubber Chemistry and Technology,1992,65(1):46-62.
[1]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[2]刘文光,杨巧荣,周福霖.建筑用铅芯橡胶隔震支座温度性能研究[J].世界地震工程,2003,19(2):39-44.
[3]何文福,刘文光,杨彦飞,等.橡胶支座水平剪切弹塑性能力学试验研究[J].兰州理工大学学报,2007,33(3):120-123.
[4]韩强,杜修力,刘文光,等.橡胶隔震支座拉伸性能试验研究[J].北京工业大学学报,2006,32(3):208-212.
[5]刘文光,杨巧荣,周福霖.天然橡胶隔震支座温度相关性试验研究[J].广州大学学报:自然科学版,2002,1(6):51-56.
[6]杨巧荣.庄学真,刘文光,等.夹层橡胶隔震支座全刚性性能、回转性能及高压缩应力性能试验研究[J].地震工程与工程振动,2000,20(4):118-125.
[13]陈火红,杨剑,薛小香,等.Marc有限元实例教程[M].北京:机械工业出版社,2007.
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