叠层橡胶隔震支座理论与试验分析
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摘要
对目前工程隔震中应用较多的低硬度叠层橡胶隔震支座LNR600进行了力学性能试验,并用有限元程序ANSYS建立了其有限元分析模型,分析了在竖向荷载和水平荷载作用下LNR600内部钢板各种应力分布,其结果与试验曲线基本吻合。结果表明,支座在竖向荷载作用下,最大的SX、SY、SZ、Mises应力均出现在支座内部钢板上,各最大值发生位置约在距离孔侧1/3半径处。各最大值相对竖向均布压力值分别为4.5倍,2.858倍,1.9倍,2.5倍。支座在压剪荷载作用下,内部钢板的应力分布由下而上均呈现出由支座有效承压区域的边缘处向支座边缘处递减,并且在支座孔边缘处形成较为明显的应力集中。
The mechanical property test on the laminated rubber isolation bearing-LNR600 is conducted.By using the large general-purpose Finite Element Program—ANSYS,the FEA(finite element analysis) model of LNR600 is established under the vertical load and horizontal displacement load.Analytical results are compared with experimental results,and small difference is found.And the stresses of the inner steel plate of the isolator are studied.Results show that the maximum values of Mises stress,SX stress,SY stress,SZ stress of the bearing are all founded in the inner steel plate,located in the place of 1/3 radius from the bearing hole edge,4.5,2.858,1.9,and 2.5 times of the vertical pressures respectively.Under the compress-shear load,the stress distribution of inner steel plate presents a decrease from the edge of the effective pressure area to the edge of the bearing,and a clear stress concentration is formed around the edge of the bearing hole.
The mechanical property test on the laminated rubber isolation bearing-LNR600 is conducted.By using the large general-purpose Finite Element Program—ANSYS,the FEA(finite element analysis) model of LNR600 is established under the vertical load and horizontal displacement load.Analytical results are compared with experimental results,and small difference is found.And the stresses of the inner steel plate of the isolator are studied.Results show that the maximum values of Mises stress,SX stress,SY stress,SZ stress of the bearing are all founded in the inner steel plate,located in the place of 1/3 radius from the bearing hole edge,4.5,2.858,1.9,and 2.5 times of the vertical pressures respectively.Under the compress-shear load,the stress distribution of inner steel plate presents a decrease from the edge of the effective pressure area to the edge of the bearing,and a clear stress concentration is formed around the edge of the bearing hole.
引文
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[7]刘文光,周福霖,庄学真,等.中国铅芯夹层橡胶隔震支座各种相关性能及长期性能研究[J].地震工程与工程振动,2002,22(1):114-120.
[8]杜修力,韩强,刘文光.方形多铅芯橡胶支座力学性能研究[J].地震工程与工程振动,2006,26(2):125-130.
[9]Mineo T,Hideyuki T,Ryuichi T.Finite-element analysis of lami-nated rubber bearing used in base-isolation system[J].RubberChemistry and Technology,1992,65(1):46-62.
[2]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[3]谭平,周福霖.隔震技术的研究与工程应用[J].施工技术,2008,37(10):5-8.
[4]邓长根,何永超.日本建筑结构隔震减震研究新进展[J].世界地震工程,2002,18(3):168-173.
[5]庄学真,沈朝勇,金建敏.桥梁高阻尼橡胶支座力学性能试验研究[J].地震工程与工程振动,2006,25(5):208-212.
[6]江宜城,聂肃非,叶志雄,等.多铅芯橡胶隔震支座非线性力学性能试验研究及其显式有限元分析[J].工程力学,2008,25(7):11-17.
[7]刘文光,周福霖,庄学真,等.中国铅芯夹层橡胶隔震支座各种相关性能及长期性能研究[J].地震工程与工程振动,2002,22(1):114-120.
[8]杜修力,韩强,刘文光.方形多铅芯橡胶支座力学性能研究[J].地震工程与工程振动,2006,26(2):125-130.
[9]Mineo T,Hideyuki T,Ryuichi T.Finite-element analysis of lami-nated rubber bearing used in base-isolation system[J].RubberChemistry and Technology,1992,65(1):46-62.
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