和美桥独斜塔单索面曲线悬索步道桥体系转换

Hemei Bridge Single Leaning Tower Single Cable Plane Curve Suspension Trail Bridge System Conversion

以福建省厦门市山海健康步道主跨216.7m的曲线异形钢箱梁悬索人行步道桥为对象,为了使桥梁成桥状态内力和线形满足设计要求,建立了该桥施工全过程三维精细化有限元模型模拟现场施工,将缆索、吊索划分为10个阶段逐步张拉,辅以现场测试,每个阶段进行理论与实测数据的对比,分析产生误差的原因,不断修正索力与线形,理论分析指导现场施工,最终顺利完成了体系转换,将主梁的自重由支架移植到了缆索体系中;成桥试验监测结果显示,该桥的线形与索力与设计期望值高度吻合,本文研究方法与所得结论可为同类桥梁的设计与施工提供借鉴。

Taking the curved special-shaped steel box girder suspension pedestrian walkway bridge with a main span of 216.7m on the Shanhai Health Trail in Xiamen City,Fujian Province as the object,in order to make the internal force and line shape of the bridge meet the design requirements,a three-dimensional refinement of the whole process of the bridge construction process is established.The meta-model simulates on-site construction,divides the tensioning of cables and slings into 10 stages and gradually tensions them,supplemented by field tests,compares the theoretical and measured data at each stage,analyzes the causes of errors,and continuously corrects the cable force and line shape,the theoretical analysis guides the on-site construction,and finally the system conversion is successfully completed,and the self-weight of the main beam is transplanted from the support to the cable system;the monitoring results of the completed bridge test show that the line shape and cable force of the bridge are highly consistent with the design expectations.The research method in this paper The conclusions obtained can provide reference for the design and construction control of similar bridges.