摘要
为研究空腹式连续梁桥V构区施工及成桥阶段的受力性能,以某实际工程为背景,建立MIDAS/Civil有限元模型,对采用支架加扣索法施工的空腹式连续梁桥V构区域的施工阶段、成桥阶段进行详细的数值模拟。结果表明:施工阶段在锁扣第一张拉阶段,下弦未脱架,主要由下弦支架承重,扣索分担;在上弦非合拢段浇筑阶段,下弦、下弦支架、扣索共同承重;扣索第二次张拉后,下弦完全脱架,V撑下弦和部分上弦重力完全由扣索和支座承重;下弦杆底缘始终处于受压状态。成桥阶段V构在不同荷载组合下各截面混凝土压应力均满足要求。分析结果可为该工程的建设提供技术指导,同时可供同类桥梁的参考。
MIDAS/Civil finite element model is established based on a real project,mechanical behaviors of the V-type open-spandrel continuous girder bridge with the construction method of stents method and guy method under construction stage and finished stage are carried out.The results show that:during the construction stage,the buckle cables share the gravity of the upper chord and ensure the safety of the lower chord bracket.The bottom edge of lower chord is always in the pressured state,which meets the requirements of specification.During the construction stage,the concrete compression stress of V-type under different load combinations can meet the requirements of specification.The research results can provide technical guidance for the construction of the project and can be used for the construction of similar bridges.
作者
陈海清
CHEN Haiqing(Fuzhou Urban and Rural Construction Development Co.,Ltd.,Fuzhou,Fujian 350003,China)
出处
《水利与建筑工程学报》
2019年第2期162-166,共5页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金资助项目(51678154)
关键词
空腹式连续梁桥
V构
支架加扣索法
数值模拟
open-spandrel continuous girder bridge
V-type
stents method and guy method
numerical simulation
