柔性储罐底环梁基础隔震地震动响应分析

基于储罐柔性罐底以及环梁基础结构的特点,提出了一种采用扇环铅芯叠层橡胶水平隔震支座与筒式黏弹性阻尼器碟形弹簧竖向隔震支座串连而成的三维隔震支座,将其与环梁基础联结构成隔震环梁基础。以50000m3储罐为例,忽略储罐罐壁的质量,将采用隔震环梁基础的大型储罐中的液体质量简化成不考虑质点间耦合作用的三质点体系模型,在水平地震动激励下对其进行水平隔震地震动响应分析,给出了简化模型地震动响应变化规律;考虑储罐罐壁与液体耦合作用,将采用隔震环梁基础的大型储罐中的液体质量简化成单质点体系模型,在竖向地震动激励下对其进行竖向隔震地震动响应分析,同样给出了简化模型的地震动响应变化规律。

The isolation seismic response analysis of flexible bottom of the storage tank and ring beam foundation

Based on the structure characteristics of the flexible bottom of the storage tank and ring beam foundation,a 3D bearings is presented,which are composed of fan ring lead-rubber level bearings and tubelike viscoelastic damper disc spring vertical bearings,connected with a ring beam,isolation ring beam foundation is formed.To 50000 m3 tank as an example,ignoring the quality of the walls of the tank,liquid quality of a large tank adopting foundation isolation ring beam is simplified as three-particle system model not considering inter-particle coupling,horizontal isolation seismic response is analyzed under the horizontal seismic excitation,and the change of seismic response is given out;considering tank wall and fluid coupling,liquid quality of a large tank adopting foundation isolation ring beam is simplified as one-particle system model,vertical isolation seismic response is analyzed under the vertical seismic excitation,and the change law of seismic response is given out at the same time.