2014年9月上 施工技术 第43卷第17期 CONSTRUCTION TECHNOLOGY 73 D0I:10.7672/5js2014170073 桁架对顶推钢梁性能影响研究* 马重刚1，周鹏华1，朱海军12，谢小飞12，朱琳1，张利平 (1.中建三局集团有限公司工程总承包公司，湖北武汉430064： 2.湖北中建三局建筑工程技术有限责任公司，湖北武汉430070) [摘要]以武汉江汉六桥钢梁大跨顶推施工为背景，通过基本原理分析采用临时结构对钢梁刚度加强方式，并对不 同加强方案进行对比分析，选取合理覆盖范围的桁架结构，以减小顶推最大悬臂⑨0m时导梁前端挠度及钢梁应力； 通过对各个顶推施工阶段计算分析和实际施工监测表明，采用桁架结构能够很好地解决导梁挠度过大和钢梁应力 水平过高的问题. [关键词]桥梁工程：悬索桥；钢梁；顶推技术；桁架；施工技术 [中图分类号]U445.462 [文献标识码]A [文章编号]1002-8498(2014)17-0073-04 Study on the Effect of Truss on the Properties of Incremental Launching Construction for Steel Girder Ma Zhonggang' Zhou Penghua' Zhu Haijun.2 Xie Xiaofei.2 Zhu Lin' Zhang Liping' (1.General Construction Company of CCTEB Group Co.Ltd.Wuhan Hubei 430064 China; 2.Hubei Building Construction Technology Co.Lsd.of CCTEB Group Co.Ltd.Wuhan Hubei 430070 China) Abstract:Based on incremental launching construction of the steel girder for the Sixth Jianghan Bridge in Wuhan the effect of temporary structure on strengthening mode of steel girder stiffness is analyzed by basic principle strengthening schemes are pared truss structure with reasonable coverage area is chosen to reduce the steel girder stress and deflection in front of guide girder in incremental launching construction of the maximum cantilever with 90m.The calculation analysis and actual construction monitoring show that truss structure can solve the problems of too large deflection of guide girder and too large stress of steel girder. Key words:bridges;suspension bridges;steel girders;increme...
桁架对顶推钢梁性能影响研究.pdf
