多跨连续梁桥合龙方案对比分析研究  

Comparative analysis of closure plans for multi-span continuous beam bridge

作　　者：郝东东[1] 陈文[2] 

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南714099 [2]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《四川建筑科学研究》2016年第3期133-135,共3页Sichuan Building Science

基　　金：陕西铁路工程职业技术学院研究生基金(2013-43)

摘　　要：多跨预应力连续梁桥施工过程中,合龙方案的选择对施工安全以及成桥后桥梁的应力和线形起到至关重要的作用。以某七跨预应力连续梁桥为例,借助有限元软件,分析并比较了现今较为常用的4种合龙方案在施工各个阶段的竖向位移和主梁应力。研究表明,对于该连续梁,位移起到了主控作用,且综合考虑位移和应力后,分跨多次合龙要优于全桥一次合龙,其中自边跨到中跨合龙为最优方案,该结论具有一定的代表性,为以后类似工程提供了参考依据。The choice of construction closure of prestressed concrete continuous bridge has enormous influence on the bridge ＇s construction safty,stress state and alignment. This paper takes a seven-span continuous bridge for an example and analyses four schemes of closure based on stress and vertical displacement with the help of FEA. As for the seven-span continuous beam bridge,the results show that vertical displacement is main controlling factor and the closure for several times is better than the closure for once and the closure from side-span to mid-span is relatively better than others. The conclusions can be a reference for related engineering.

关 键 词：连续梁 合龙 有限元 应力 位移 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]