摘要
大型自支撑储罐是国外项目中常用的液体储存容器,其罐顶厚跨比较小,稳定性是其设计的控制因素。利用ANSYS有限元分析软件分别建立了跨度22m的单层网架罐顶和跨度33m的双层桁架罐顶,并对它们进行了完善模型和缺陷模型的特征值屈曲分析,随后还同时考虑几何和材料双重非线性进行全过程跟踪分析。分析结果表明单层网架罐顶整体稳定性能较好,受力均匀,没有出现局部屈曲变形过大的情况。双层桁架罐顶前三阶模态变形比较理想,增大腹杆截面能增加罐顶桁架稳定性能。通过系统地研究了大型自支撑锥形罐顶的稳定性,可为以后类似工程提供参考。
Large self-supporting tank is a common liquid storage vessel in foreign projects,and its roof thickness span is small,so its stability is the control factor of its design.In this paper,the finite element analysis software ANSYS is used to establish the single-layer grid roof with a span of 22m and the double-layer truss roof with a span of 33m.After the eigenvalue buckling analysis of the improved model and defect model,the whole process tracking analysis considering the geometric and material nonlinearity is carried out.The results show that the overall stability of single-layer space truss tank roof is good,the stress is uniform,and there is no local buckling deformation.The first three modal deformations of double-layer truss roof are ideal,and the stability of roof truss can be improved by increasing the section of web member.This paper systematically studies the stability of large self-supporting conical tank roof,which can provide reference for similar projects in the future.
作者
逯娟
詹旺宇
崔炜
叶家剑
王博
LU Juan;ZHAN Wangyu;CUI Wei;YE Jiajian;WANG Bo(China Petroleum Pipeline Engineering Corporation,Langfang 065000,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S01期668-672,共5页
Building Structure
关键词
罐顶
稳定
有限元
特征值
非线性
tank roof
stability
finite element
eigenvalue
nonlinear
