不同壁厚圆形沉井受力分析  

Stress Analysis of Circular Caisson with Different Wall Thickness

作　　者：郭华 刘世忠[1] GUO Hua;LIU Shi-zhong(College of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《兰州工业学院学报》2021年第1期8-12,共5页Journal of Lanzhou Institute of Technology

摘　　要：为了使沉井施工方案更加合理,对某圆塔停车库进行不同井壁厚和底板厚的受力分析.通过Ansys有限元软件建模,对不同厚度井壁进行多工况的位移和应力分析.结果表明:圆形井壁在施工阶段不受径向拉应力和环向拉应力,井壁径向压应力随井壁厚度的减小而减小;圆形井壁径向位移和环向压应力均随井壁厚度的减小而增大;沉井不同壁厚对底板厚度的要求也不同,当壁厚一定时,沉井整体结构位移和应力均随底板厚度减小而增大;在满足规范要求条件下,圆形沉井井壁厚度1.0 m、井底厚度1.7 m为最优厚度.可为沉井的优化提供理论依据.In order to make the caisson construction more reasonable,stress analysis of different wall thickness and floor thickness in a round tower parking garage is carried out.Through Ansys finite element software modeling,the displacement and stress of shaft lining with different thickness are analyzed under different working conditions.The results show that the radial compressive stress of the circular shaft wall is not affected by the radial tensile stress and the circumferential tensile stress The radial displacement and the circumferential compressive stress of the circular shaft wall increase with the decrease of the shaft wall thickness,and the different wall thickness of the open caisson has different requirements for the thickness of the bottom plate,the displacement and stress of the whole structure of the open caisson increase with the decrease of the thickness of the floor.Subject to the requirements of the specification,the optimum thickness of the circular open caisson is 1.0 m for the wall and 1.7 m for the bottom of the open caisson,which can provide theoretical basis for the optimization of the open caisson.

关 键 词：圆形沉井 有限元模拟 沉井优化 

分 类 号：TU926[建筑科学—建筑设计及理论]