橡胶垫基础隔震浮顶储罐的非线性地震响应研究
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摘要
从浮顶参与地震响应的角度出发,采用Nagarajaiah模型模拟铅芯橡胶支座(LRB)的力-变形非线性行为,研究了铅芯橡胶支座隔震储罐的地震响应特征。分析了地震烈度、高径比以及场地条件对立式钢制浮顶储罐隔震与非隔震状态地震响应的影响。分析表明,不同工况下,隔震体系能够有效地降低储罐的倾覆力矩,减少基底剪力,满足结构控制。但对波高的控制效果并不明显。合理优化高径比,选择场地,可以得到理想的减震效果。
Starting in the perspective of the floating roof taking part in dynamic response,the Nagarajaiah model being adopted to simulate the non-linear hysteretic characteristics of force-displacement relationship for LRB and the seismic response of it have been analyzed.An analysis that the influence of seismic intensity,high aspect ratio and site conditions on the vertical steel floating roof storage tank with non-isolated and isolation have been done.The result indicates that the isolation system can effectively reduce tanks overturning moment and the base shear,and meet the purpose of structure control in different conditions.But the wave height control is not obvious.When we optimize aspect ratio and choose site reasonably the damping effect will be ideal.
Starting in the perspective of the floating roof taking part in dynamic response,the Nagarajaiah model being adopted to simulate the non-linear hysteretic characteristics of force-displacement relationship for LRB and the seismic response of it have been analyzed.An analysis that the influence of seismic intensity,high aspect ratio and site conditions on the vertical steel floating roof storage tank with non-isolated and isolation have been done.The result indicates that the isolation system can effectively reduce tanks overturning moment and the base shear,and meet the purpose of structure control in different conditions.But the wave height control is not obvious.When we optimize aspect ratio and choose site reasonably the damping effect will be ideal.
引文
[1]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[2]孙建刚,袁朝庆,郝进锋.橡胶基底隔震储罐地震模拟试验研究[J].哈尔滨工业大学学报,2005,6(37):806-809.
[3]孙建刚,张丽,袁朝庆.立式储罐基础隔震动力反应特性分析[J].地震工程与工程振动,2001,3(21):140-145.
[4]CHALHOUB M S,KELLY J M.Shake table test of cy-lindral water tank in base isolated structures[J].Journalof Structural Engineering,ASCE,1990,116(7):1451-1472.
[5]KIMN S,LEE D G.Pseudo-dynamic test for evalutionof seismic performance of base isolated liquid storagetanks[J].Engineering Strcuctures,1995,17(3):198-208.
[6]NAGARAJAIAH S,REINHORN A M,CONSTANTINOUMC.Non-linear dynamic analysis of3-D base isolatedstructure[J].Journal of Structure Engineering,ASCE,1991,117,2035-2054.
[7]赵长军,孙建刚,崔利富,等.立式浮顶储罐地震响应分析[J].大连民族学院学报,2010,12(5):460-463.
[2]孙建刚,袁朝庆,郝进锋.橡胶基底隔震储罐地震模拟试验研究[J].哈尔滨工业大学学报,2005,6(37):806-809.
[3]孙建刚,张丽,袁朝庆.立式储罐基础隔震动力反应特性分析[J].地震工程与工程振动,2001,3(21):140-145.
[4]CHALHOUB M S,KELLY J M.Shake table test of cy-lindral water tank in base isolated structures[J].Journalof Structural Engineering,ASCE,1990,116(7):1451-1472.
[5]KIMN S,LEE D G.Pseudo-dynamic test for evalutionof seismic performance of base isolated liquid storagetanks[J].Engineering Strcuctures,1995,17(3):198-208.
[6]NAGARAJAIAH S,REINHORN A M,CONSTANTINOUMC.Non-linear dynamic analysis of3-D base isolatedstructure[J].Journal of Structure Engineering,ASCE,1991,117,2035-2054.
[7]赵长军,孙建刚,崔利富,等.立式浮顶储罐地震响应分析[J].大连民族学院学报,2010,12(5):460-463.
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