变截面钢板组合梁施工方案结构性能对比分析  

Comparison and Analysis of Structural Performance of Steel and Concrete Composite Girder with Variable Sections

作　　者：朱众[1] 赵阳[1] ZHU Zhong;ZHAO Yang(Guizhou Transportation Planning Survey & Design Academe Co., Ltd., Guiyang 550081, China)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳550081

出　　处：《交通科技》2018年第6期55-59,共5页Transportation Science & Technology

摘　　要：为分析大跨径变截面钢板组合梁在施工阶段的结构受力性能,文中提出桥面板与钢主梁安装施工的3种不同方案并建立midas模型,实现对钢主梁、桥面板在施工阶段的应力变化分析和该结构在不同施工方案下的应力变形对比。结果表明:钢主梁合龙后间断安装桥面板的施工方案利于该结构的受力状态;同时,针对大跨径钢-混组合梁负弯矩区容易出现的桥面板拉应力超限问题,建议采用支点顶升的方法并分析理想顶升量,最终提出间断安装法结合支点顶升的施工优化思路。In order to analyze the structural performance of long-span steel and concrete composite girder bridge with cross-section during construction,three different schemes for the installation of bridge deckand steel girder are proposed,and the Midas modelis established to analyze the stress changes during the construction phase and to compare the stress and deformation of the structure under different construction schemes.The analysis result shows that discontinuous installation of the bridge deck after the closure of steel girder facilitates the structural stress state.At the same time,aiming at the problems that the bridge panel tension stress tends to appear in the negative bending moment region of long-span steel-concrete composite girders,the measure for fulcrum lifting is suggested.By analyzing the ideal lifting amount,the construction optimization idea of discontinuous installation method combined with fulcrum lifting is finally proposed.

关 键 词：钢板梁 负弯矩区 施工方案 结构受力状态 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]