圆弧拱形钢管在水平荷载和半跨水重作用下的P-△效应  

The P-△Effect of Hingedess Circular Arch Steel Pipeline Under Htorizontal Load together with Water Load Acting on Half a Span

作　　者：郭天木[1] 

机构地区：[1]中国市政工程西南设计研究院,成都610081

出　　处：《特种结构》2006年第4期82-83,共2页Special Structures

摘　　要：以往工程设计中均没有考虑拱管在水平荷载作用下产生水平位移后在半跨垂直荷载作用下对支座产生的附加弯矩及附加扭矩。这个附加弯矩和附加扭矩到底有多大,工程设计中能否忽略不计?本文从理论上加以推导并给出工程中三种常用矢跨比的实用计算公式。In structural design of hingclass circular arch steel pipeline, the P-Δ effect due to outside plane horizontal displacement with vertical load acting on half a span may be usually unconsidered. During this effect, whether the addtional moment and torsion can be neglected, which is discussed and the practical calculating formulas for three types of radio of rise to span are derived in this paper.

关 键 词：附加弯矩 附加扭矩 矢跨比 水平荷载 垂直荷载 

分 类 号：TU392.3[建筑科学—结构工程]