摘要
为了降低水平地震激励下圆柱形储罐的地震响应,假定储罐罐壁为刚性运动,液体为理想流体,同时考虑液体自由表面的晃动影响,依据储罐内液体满足的边界条件和势流体理论,给出了动水压力、基底剪力和倾覆力矩的理论表达.利用相同激励下原型罐和等效力学模型罐基底剪力和弯矩等效原则,给出了刚性储罐晃动波高、基底剪力和弯矩的简化表达,建立了刚性储罐基础隔震两质点简化分析力学模型.依据Hamilton原理建立了刚性储罐基础隔震运动分析方程.结果表明,在隔震状态下,液体的对流分量对基底剪力和倾覆力矩的贡献是不可忽略的,隔震对晃动波高的影响不大,对基底剪力和弯矩的降低效应明显.
In order to reduce the seismic response of cylindrical storage tanks during horizontal earthquake action,the tank wall was assumed to be rigid,and the ideal fluid was liquid.In considering the convection motion of a free surface according to boundary conditions and potential theory,the hydrodynamic,base shear,and overturning moment were given.The sloshing wave height,base shear,and overturning moment were given by using the same base shear and overturning moment of the liquid tank system and an equivalent mechanical model which were subjected to the same ground motion.Therefore,a model showing analysis of the two centralized particles was established.The control equations of the system-motion were derived from Hamilton＇s principle.The result shows that the contribution of the convective component to base shear and overturning is not neglected by the isolation.The isolation has little effect on the sloshing wave,and the base shear and overturning moment are effectively reduced.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2011年第1期38-43,共6页
Journal of Harbin Engineering University
基金
国家自然科学基金资助项目(51078063/E0808)
关键词
刚性储罐
地震
基底隔震
势函数
动力反应
rigid storage tank
earthquake
base isolation
potential function
dynamic response
