简支转连续组合箱梁支承结构内力效应分析

简支转连续组合箱梁越来越多地应用于长桥以及大桥的引桥,该结构的支承形式包括单排支承和双排支承,单排支承需要将临时支座转换为中间1排永久支座,双排支承则直接在临时支座的位置安放2排永久支座。文章分别对简支转连续的施工过程进行受力分析对比,得出了2种支承形式在恒载、活载以及附加内力作用下不同的结构内力效应,为单、双排支承结构的研究、设计以及施工提供了一定的参考。

Internal Force Effect Analysis of Supporting Structure for Composite Box Girder with Simply Supported into Continuous Support

Composite box girder with simply supported into continuous support is more and more widely used in long bridges and approach spans.There are two kinds of supporting forms,including single-row bearing and double-row bearing.For single-row bearing,temporary supports need to be changed into a single row of temporary supports,while for double-row bearing,two rows of temporary supports can be directly set on the location of the temporary supports.This paper compares force analysis during simply supported into continuous support construction,and analyzes different structural internal force effect for these two supporting forms under the action of dead load,live load and additional inner force.It can be taken as reference for the research,design and construction of single-row and double-row supporting structure.