摘要
赣江二桥为主跨400 m的双塔双索面钢混凝土叠合梁斜拉桥,为了实现施工过程中设计索力的精确控制,为二期恒载作用下的索力调节提供依据,基于ANSYS平台建立了斜拉桥三维空间有限元模型;考虑每条斜拉索索力之间的相互影响,基于内应变能最小的原则,采用循环迭代的温度荷载方法模拟斜拉索预应力的施加;最大单悬臂施工工况下的索力分析结果表明,当循环迭代37次后,索力误差已经控制在5%以内,在此基础上计算桥梁的竖向以及纵向位移均能满足限度的要求。这为钢混凝土叠合梁斜拉桥施工过程索力的调整提供了一种方法,对类似工程的实施具有参考价值。
Ganjiang Second Bridge is a 400 m-span twin towers double cable plane steel concrete composite beam cablestayed bridge. In order to realize the precise control of the cable force in the construction, and provide the basis for the adjustment of the cable force under the second stage dead load, the three-dimensional space finite element model of the cablestayed bridge is established based on the ANSYS platform. Based on the principle of the minimum internal stress, considering the mutual influence of the cable force of each cable, the temperature load method of cyclic iteration is adopted to simu- late the prestress of the stay cable. The analysis results for the largest single cantilever construction section show that, when the loop iteration is 37 times, the force error is less than 5%, and the vertical and longitudinal displacement of the bridge can meet the limit requirements. A method is provided for the adjustment of cable force in the construction of the steel reinforced concrete composite beam cable-stayed bridge, it can be served as a reference for similar projects.
出处
《铁道建筑技术》
2017年第6期23-26,71,共5页
Railway Construction Technology
基金
中国铁建股份有限公司科技研究开发计划项目(15-C13)
关键词
斜拉桥
温度荷载法
循环迭代法
索力
cable-stayed bridge
temperature load method
cyclic iterative method
cable force
