城市立交桥异形箱梁匝道岔口分析  

Analysis on Crotches of Irregular Box Girder Ramp of Urban Grade Separation

作　　者：刘斌 叶贵如[2] 陈衡治[2] 

机构地区：[1]杭州城建设计研究院有限公司,杭州310001 [2]浙江大学土木系,杭州310027

出　　处：《中国市政工程》2004年第4期26-28,共3页China Municipal Engineering

摘　　要：利用三维空间有限元法对杭州上德立交工程中的一联异形箱梁进行分析,重点分析在自重和设计荷载作用下,暗梁宽度变化与异形箱梁分岔处应力之间的关系。取得了一些传统平面计算方法无法获得的结果。由此,在桥梁的暗梁设计中,主要应考虑其本身的受力及结构整体的构造要求,而暗梁宽度对岔口处应力的影响可不作控制。Analysis has been made on irregular box girders of Hangzhou Shangde Grade Separation Project with 3D finite element method, especially on the relation between the width variation of secrete beams and the stresses at the crotches of irregular bridge under deadweights and design loads. The results gained cannot be taken from conventional plane calculation methods. In design of secrete beams of bridges, its loadings and structural requirements are the main factors should be considered, and the affection the widths of secrete beams exerted on stresses of crotches may be neglected.

关 键 词：立交桥 暗梁 异形箱梁 岔口 应力分析 有限元法 

分 类 号：U448.17[建筑科学—桥梁与隧道工程]