大型钢储罐的沉降与结构性能的关系  

SETTLEMENT AND STRUCTURAL BEHAVIOR OF LARGE STEEL STORAGE TANKS

作　　者：赵阳[1] 曹庆帅[1] 谢新宇[1] 

机构地区：[1]浙江大学建筑工程学院,杭州310027

出　　处：《工业建筑》2007年第4期65-68,共4页Industrial Construction

基　　金：国家自然科学基金资助项目(50208017);教育部留学回国人员科研启动基金资助项目(J20040157)

摘　　要：建造在软土地基上的大型钢储罐易产生各种沉降变形,其中罐周不均匀沉降的影响最为不利。在各类大型储罐沉降变形的大量实测数据基础上,利用傅立叶分解分析罐周不均匀沉降的组成及特点,利用分析得到的谐波沉降对储罐结构进行有限元分析。分析表明,储罐在不均匀沉降下的应力和变形均与其几何参数有关,因此目前基于工程经验且与储罐参数无关的地基变形允许值控制标准,从结构的角度看不尽合理。Large steel storage tanks constructed in soft foundations are susceptible to various types of settlement deflections, and the differential settlement beneath the tank wall leads to the most serious consequence for the tank. Based on a great deal of measured data for the settlements of various types of in-site large tanks, the composition and characteristics of the differential settlement beneath the tank wall are analyzed using Fourier decomposition. The derived harmonic settlements are then introduced in finite element analyses of the tank structure. It has been shown that the stresses and deformations in the tank under differential settlements are dependent on its geometric parameters. Thus current empirical criteria for allowable deformation of foundation that is independent of geometric parameters seems unreasonable viewed from the structural perspective.

关 键 词：钢储罐 不均匀沉降 实测沉降 应力分析 地基变形允许值 

分 类 号：TU433[建筑科学—岩土工程]