储罐地震易损性数值仿真分析

英文篇名：Numerical simulation analysis on the seismic fragility of storage-tank
中文刊名：哈尔滨工业大学学报
英文刊名：Journal of Harbin Institute of Technology
作者：孙建刚 ; 张荣花 ; 蒋峰
英文作者：SUN Jian-gang1 ; 2 ; ZHANG Rong-hua2 ; JIANG Feng2(1.College of Civil and Architecture Engineering ; Dalian Nationalities University ; Dalian 116600 ; China ; 2.College of Civil and Architecture Engineering ; Daqing Petroleum College ; Daqing 163318 ; China)
中文关键词：储罐 ; 数值仿真分析 ; 失效模式 ; 随机变量 ; 地震易损性
英文关键词：storage tank ; numerical simulation analysis ; disable mode ; random variable ; seismic fragility
出版日期：2009-12-15
机构：大连民族学院土木建筑工程学院;大庆石油学院土木建筑工程学院;
年：2009
期：12
出版单位：哈尔滨工业大学学报

摘要

为了研究储罐的抗震性能,忽略储罐罐壁的质量,将储罐中的液体质量简化为三质点体系模型,地基土由两个弹簧和两个阻尼器模拟.考虑罐体的平动和转动,建立了在水平地震激励下储罐的动力方程;给出了随机变量的概率模型和基于易损性理论的失效概率计算方法.通过对大庆某油库2×104 m3和5×104m3两种大型储罐进行数值仿真方法的地震易损性分析.结果表明:随着地震烈度的增大,储罐的易损性逐渐增大;5×104 m3储罐的抗震性能要好于2×104 m3储罐;2×104 m3和5×104 m3储罐的主要失效模式分别是抗失稳和抗提离.由此可见从多个失效模式对储罐进行地震易损性研究比从单一失效模式进行易损性研究更加科学.
In order to study the seismic performance of tank,ignoring the quality of the walls of the tank,the quality of liquid in the tank is simplified as a three-particle system model.Soil is modeled by two springs and two dashpots.Considering translation and rotation of tank,dynamic equation is established under the horizontal seismic excitation.Probability models of the random variables and calculation method of disabled probabili-ties on the basis of seismic fragility theory are given.The seismic fragility of 2 ×104m3and 5 ×104m3 largescale storage tanks of Daqing oil-room is analyzed by numerical simulation methods.The numerical result shows that the seismic fragility of tank gradually increases with the increase of seismic intensity,and the seismic performance of 5 ×104m3 tank is better than that of 2 ×104m3 tank.The main disabled mode of × he two tanks is anti-instability and anti-uplifting respectively.Evaluation of the seismic performance of tank from various disable modes is more scientific than that from single mode.

引文

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