摘要
管廊工作井在服役期内不可避免地会经受不利因素。为研究地表荷载及材料耐久性对结构性能的影响,通过管廊工作井试验,分析了五种堆载工况下的结构变形以及井壁应力的变化规律。利用有限元软件研究了周边荷载及混凝土强度退化对结构性能的影响。研究结果表明:工作井长轴井壁的应力要大于短轴井壁的应力,在中间楼板和井壁连接位置处容易出现应力集中现象。在最大荷载工况下,长轴井壁上部变形比短轴井壁变形大44.3%,上层井壁位移比下层井壁位移大30%。周围荷载对于工作井结构的影响随着深度的增加逐渐减小,荷载距离或荷载大小的变化并不会造成工作井底部的水平位移及应力的明显变化。
Pipe gallery work wells are inevitably subjected to adverse factors during their service life.ln order to study the influence of surface load and material durability on structural properties,this paper analyzes the structural deformation and wall stress variation law under five kinds of heap loading conditions through the test of pipe gallery working wells.The effects of surrounding loads and concrete strength degradation on structural properties are studied by using finite element software.The results show that the stress of the long-axis well wall of the working well is greater than the stress of the short-axis well wall,and the stress concentration phenomenon is prone to occur at the middle floor slab and the connection position of the well wall.Under the maximum load condition,the deformation of the upper part of the long-axis well wall is 44.3%greater than that of the short-axis well wall,and the displacement of the upper shaft wall is 30%greater than that of the lower shaft wall.The influence of the surrounding load on the structure of the working well gradually decreases with the increase in depth,and the change of load distance or load size does not cause a significant change in the horizontal displacement and stress at the bottom of the working well.
作者
顾洪波
黄瑞
鲁楠
王鑫
GU Hongbo;HUANG Rui;LU Nan;WANG Xin(East China Electric Power Design Institute Co.,Ltd.,China Power Engineering Consulting Group,Shanghai 200063,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2022年第S02期158-162,共5页
Engineering Journal of Wuhan University
关键词
管廊工作井
模型试验
耐久性分析
有限元分析
pipe gallery work well
laboratory model tests
durability analysis
finite element analysis
