The behavior of the casual anchor skeleton at the closure for a PC continuous box gird-er bridge do have great effect on the closuring quality and the workability of the bridge.This paper pres-ents a finite element study of the static behavior of the casual anchor skeleton at the closure for a PC con-tinuous box girder bridge considering the increasing temperature,the vertical unbalance temperature and the wind during different stage.It shows that prestress tensile stage is the critical stage as the stress of the steel skeleton is the largest.Considered with the traditional method of the casual anchor skeleton calcula-tion,the effects of the increasing temperature,the vertical unbalance temperature and the wind are sig-nificant as stresses at the critical section are beyond 5 percent to them when such load is ignored.As a result,the increasing temperature,the vertical unbalance temperature and the wind must be considered as well when design the casual anchor skeleton.%预应力混凝土连续箱梁桥合拢段劲性骨架的受力情况对梁桥合拢有着十分重要的影响.采用非线性有限元软件 midas FEA对预应力混凝土连续箱梁桥施工阶段的合拢段劲性骨架进行受力分析,结合箱梁的温度荷载分析理论,讨论不同施工阶段整体升降温作用、竖向温差作用、风荷载作用下合拢段劲性骨架的受力情况,并对竖向温差作用下的分析结果与传统分析方法确定的劲性骨架的内力进行对比,提出了劲性骨架设计计算中必须注意的问题,为劲性骨架设计计算提供指导.
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