考虑摆动效应的立式储罐隔震分析简化力学模型  

Simplified mechanical model for vibration isolation analysis of a vertical storage tank considering swinging effect

作　　者：孙建刚[1,2] 郝进锋[3] 刘扬[3] 王振 崔利富 

机构地区：[1]大连民族大学土木工程学院,辽宁大连116600 [2]兰州理工大学土木建筑工程学院,兰州730050 [3]东北石油大学土木建筑工程学院,黑龙江大庆163318

出　　处：《振动与冲击》2016年第11期20-27,60,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51478090);中央财政自主基金(DC201502040403)

摘　　要：对于基础隔震大型立式储罐的地震响应分析问题,考虑土壤与结构的相互作用和储罐的摆动效应,从流体速度势理论出发,结合储罐储液与罐壁的边界条件,建立液体运动势函数和相应的基底剪力、倾覆力矩及波高的理论表达式;并依据剪力和弯矩等效的原理,建立了具有摆动效应的基础隔震储罐的力学简化模型,利用能量原理建立了考虑摆动效应的立式储罐隔震体系的运动方程。同时,以15万m^3大型储罐为例,进行了减震效应数值计算分析,并与无摆动效应的隔震体系的简化力学模型进行了比较分析。结果表明:大型储罐采用基底隔震装置,可以有效地降低储罐的基底剪力,对液体晃动波高的控制效果较差,建议在高烈度区,满足晃动波高的前提下,储罐上部结构可以降低烈度进行设计。For seismic response analysis of large vertical storage tanks with base isolation , the interaction of soiland structure and the swinging effect of storage tank were considered. Starting from the theory of fluid velocity potential ,the boundary conditions of storage tank , storage liquid and tank wall were combined , liquid movement potential functionand the corresponding theoretical expressions of base shear , overturning moment and wave height were established.According to the equivalent principle of shear and moment , the simplified mechanical model of a base-isolated tank withswinging effect was established , the motion equation of a vertical storage tank vibration isolation system consideringswinging efect was established using the energy principle. At the same time , taking a 15 as an example , the vibration isolation effect numerical analysis was performed , and the comparative analysis between thesimplified mechanical model of the system and that of the same sytem without swinging effect was conducted. The resultsshowed that the large scale storage tank with based isolated device can effectively reduce the base shear of the storagetank , it has a poor control effect on liquid sloshing wave height; in a high intensity earthquake area , in the promise ofmeeting the requirement of sloshing wave height , the upper structure of the storage tank can be designed on the basis ofreducing the earthquake intensity.

关 键 词：储罐 摆动 隔震 地震响应 

分 类 号：TU352.1[建筑科学—结构工程] TU473.1