摘要
2次负弯矩预应力筋的张拉和临时支座的拆除是先简支后连续结构体系桥梁施工的关键工序,不同的施工顺序会对结构内力产生不同影响。以4跨50 m T梁工程为例,对2次负弯矩预应力筋张拉和临时支座拆除的不同施工程序进行计算分析。分析表明:梁端湿接缝的预应力张拉顺序和临时支座的拆除顺序都会对结构内力产生一定影响。
Tension of negative moment prestressed reinforcements twice and removal of temporary supports are key working procedures in construction of bridges with simple-supported beam to continuous beam structural system,and different construction sequences will produce different influences on internal force of structure.Based on a 4-span 50mT beam project as an example,this paper calculates and analyzes different construction procedures for tension of negative moment prestressed reinforcements twice and removal of temporary supports.The results of analysis show that both the sequences of prestressed tension of wet joints on beam ends and removal of temporary supports produce a certain influence on internal force of structure.
出处
《公路交通技术》
2010年第6期74-78,共5页
Technology of Highway and Transport
关键词
先简支后连续
临时支座
预应力张拉
simple-supported beam to continuous beam
temporary support
prestressed tension
