投稿-特种结构-基于ANSYS的储液池边界土弹簧刚度分析详解.doc

基于ANSYS储液池分析 毕继红1,2，张聪1，关健1 (1. 天津大学建筑工程学院，天津 300072； 2. 滨海土木工程结构与安全教育部重点实验室（天津大学），天津 300072) 摘 要：场地土的动力特性直接影响储液池结构的抗震性能，首先依据场地土类别和结构的固有周期，计算结构的基准水平震度kh0，使用震度法依据kh0计算动荷载并对整体模型进行线弹性计算，得到结构相邻各侧土层平均剪切角γ；其次依据土层G/G0-γ曲线，土和储液池的。关键词：储液池；土动力特性；震度法 The seismic performance analysis of reservoir based on ANSYS and FINAL BI Ji-hong1,2, ZHANG Cong1, GUAN Jian1 (1. School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Key Laboratory of Coast Civil Structure Safety, Ministry of Education, Tianjin University, Tianjin 300072, China) Abstract: Dynamic characteristics of site soil directly affect the seismic performance of underground structures, on which, the three-dimensional elastic-plastic analysis of the reservoir is necessary. Firstly, this paper computes the basic seismic intensity kh0 basing on classifications of site soil and the inherent cycle of structures, and then adopts seismic degree method to calculate dynamic loads and the overall elastic model to get the average shear angle γ of soils adjacent to the structure of 8 cases; secondly, calculates dynamic shear modulus G of each side’s soils of every case and analyzes influence factors basing on G/G0-γ curves ; finally according to G calculates soil spring stiffness to simulate the interaction between soil and reservoir. Through the analysis of this paper, it provided a simple and practical method for analysising soil spring stiffness of simulating the dynamic interactions between the reservoir and soil. Key words: reservoir; soil springs; dynamic characteristics of soil; dynamic shear modulus; seismic degree method 0前言 地下储液池作为一种地下存储设施，在水利、石油、化工等领域有着广泛的应用[1]。随着近些年全球板块运动活跃性增强，全球地震发生频次增加。尤其是日本阪神大地震[]之后，因储液池结构功能的特殊性，其抗震设计日益受到重视[3]基于有限元接触分析，提出了一个新的地基一结构耦合建模方法，通过监测地基沉降量得知储液罐罐壁及底板的应力应变水平和分布情况；刘筠[4]采用文克尔弹性地基模型，以侧壁和底部的弹簧模拟二维储液池周围土的弹性；丁晓敏、张会超等[；刘晶波,李彬,刘祥庆[]采用等效线性化程序SHAKE91进行一维土层地震反应分析，在不计算相互作用系数的情况下模拟土-结构之间的相互作用。 本文正是在这些研究现状的基础上，先依据震度法结构相邻土层的动剪切角；由G/G0-γ曲线计算储液池各侧土层动剪切刚度，土弹簧1 工程概况 本储液池是1977年建造于某净水厂内的一座排泥