变截面空心薄壁高墩稳定临界力计算  

Critical load calculation for stability of variable section thin-walled hollow high piers

作　　者：蒋孝辉[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《工程建设》2007年第5期16-18,共3页Engineering Construction

摘　　要：利用能量原理的Ritz法,假定墩身截面惯性矩按线形变化,得到一端固结一端自由和一端固结一端铰接的变截面空心薄壁高墩稳定临界力的计算公式,通过与有限元计算结果对比,表明本文方法计算精度完全能满足设计需要。Based on Rita method of energy principle, and after the linear presumption of inertial moment of section of piers, the equations of critical load for stability of variable section thin- wailed hollow high piers were deducted with two conditions. One condition is the piers with a fixed end and a free end, and the other is the piers with a fixed end and a hinge end. A calculation example shows that there is a certain difference between the calculation method with this method and the finite element result, and it can be used to approximately estimate the stability of high piers in design and construction.

关 键 词：变截面空心薄壁高墩 RITZ法 稳定性 临界力 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]