折线形拱管在水平荷载作用下的P-Δ效应  

P-A Effect of Foldline Arch Steel Pipeline Under the Action of Horizontal Load

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》2007年第3期23-26,共4页Special Structures

摘　　要：折线形拱管结构设计中,通常计算由垂直荷载引起的平面内内力Mx、Nx、Qx和由水平荷载引起的平面外内力My、T、Qy,然后进行内力组合和强度校核。现有文献均没有考虑由于水平位移后在垂直荷载作用下所产生的对支座的附加力矩。这个附加力矩到底有多大,工程设计中能否忽略不计?本文从理论上加以推导,并给出实用计算公式。Foldliue arch steel pipeline sractural design, usually calculate inside the plane internal force Mx , Nx , Qx due to Vertical load and outside plane internal force My, T, Qy due to horizontal load. Afterward internal force combination and strength check are conducted. Additional moment on the support due to horizontal displacement is not to be condisdered in all current documents. What is the magnitude of this additional moment and it can be neglected or not ？ In this paper, the additional moment due to horizontal displacement practical calculation formula is derived.

关 键 词：折线形拱管 附加弯矩 附加扭矩 水平荷载 垂直荷载 

分 类 号：U173[交通运输工程]