混合梁桥设计中桥梁跨径布置分析  

The Analysis of Span Arrangement in Hybrid Girder Span's Design

作　　者：张京[1] 李丹[1] 李国峰[1] 

机构地区：[1]北京市市政工程设计研究总院,100082

出　　处：《特种结构》2013年第3期27-30,共4页Special Structures

摘　　要：城市桥梁常常需跨越既有道路,新建桥梁布跨常受到管线、桥下道路、现状构筑物等影响,可能出现受力不合理的跨径布置。本文分析了混合梁受力特点,通过实际马家堡工程并结合城市桥梁特点,提出了混合梁在跨越既有道路及非常规边中跨比桥梁中的适用性和优越性。Nowadays, the bridge is often ordered to across the status of the road, and the new bridge is often restricted by the municipal pipelines, the roads and current structures. As the result, there are some unreasonable designs. In order to analyze the stress characteristic of the hybrid girder in different condition, it is very important to find the ratio of spans. A more effective way to resolve the city bridges reasonable span problem is pointed out, and some calculations about Ma Jiapu bridge have been done to prove our point of view. There are applicability and superiority in the conditions of crossing road and unconventional ratio of span.

关 键 词：混合梁 钢梁长度比 边中跨比 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]