水平地震作用下无锚固储罐应力与应变响应分析  

Stress and strain response analysis of unanchored tank under horizontal seismic action

作　　者：孙建刚[1] 宫克勤[2] 齐含兵[2] 王莉莉[2] 

机构地区：[1]大连民族学院土木建筑工程学院,辽宁大连116600 [2]大庆石油学院土木建筑工程学院,黑龙江大庆163318

出　　处：《地震工程与工程振动》2007年第3期110-115,共6页Earthquake Engineering and Engineering Dynamics

基　　金：黑龙江省自然科学基金项目(E0235);大连民族学院资助项目

摘　　要：在考虑地基与储罐相互作用的情况下,采用有限元法对储罐在水平地震荷载作用下的应力及应变反应进行了数值计算。对3×104m3和2×103m3罐壁应力及应变的分析结果表明:环向、轴向应力及应变的分布形式呈现出明显的下部大上部小的特点,在偏底部的位置出现应力和应变的峰值;储液罐在水平地震作用下“象足”变形是由纵向压应力达到屈曲临界应力导致的屈曲破坏,不是强度破坏,即破坏属于失稳破坏而非强度破坏。Finite element method is used to compute the stress and strain responses of unanchored tank under horizontal seismic action considering the interaction between foundation and tank. In the view of the analysis results of stress and strain on the 3 × 10^4m^3 and 2 × 10^3m^3 tank wall, the ring and the axial stress and strain distributed form shows that the down part＇ s stresses and strains are bigger than those in the upside part and the peak values of the stress and the strain in the leaning base position appear. The elephant foot distortion is not the sign of strength destruction but the sign of flexure destruction, i.e. causing the unstability due to longitudinal stresses reaching the critical flexure stress.

关 键 词：储罐 地震反应 相互作用 有限元 应力分析 

分 类 号：P315.963[天文地球—地震学]