摘要
为提高斜塔有背索斜拉桥的施工控制精度,以阿勒泰市红墩路跨河桥为工程背景,采用有限元计算程序MIDAS Civil建立三维空间有限元模型,利用仿真分析方法对各设计参数的敏感性进行研究,分析了温度变化、结构自重、施工索力、主梁刚度等参数在成桥阶段对桥梁内力、线形及索力的影响规律。计算结果表明:温度变化对成桥索力影响较大;温度变化、施工索力误差对主梁线形、内力以及桥塔位移影响较大;结构自重对成桥状态有一定影响。通过修正主要设计参数,忽略次要设计参数,对红墩路跨河桥进行施工监控,所得成桥线形状况良好,误差在允许范围内。
In order to improve the construction control accuracy of the cable-stayed bridge with inclined pylon and back stay cables, the Hongdun Road River-Crossing Bridge in Altay City was taken as the engineering background. The finite element calculating programme MIDAS Civil was used to establish the three-dimensional finite element model, using the simulation analysis method to study the sensitivity of different design parameters. The impact pattern of parameters, such as temperature variation, dead weight of the structure, cable force during the construction and the rigidity of the main girder on the geometrical shape and the internal force of the main girder and the displacement of the bridge pylon in completed bridge state, was analyzed. The re- sults of the calculation show that temperature changes have great influence on the cable force of the completed bridge; temperature changes and errors of cable force during construction can exert great influence on the geometrical shape and internal force of the main girder and the displacement of bridge pylon; and the dead weight of the structure has certain influence on the condition of the completed bridge. The construction monitoring of Hongdun Road River-Crossing Bridge was done by modifying the main design parameters and ignoring the peripheral parameters, as a result, the geometrical shape of the completed bridge was good and the errors were within the allowable range.
出处
《世界桥梁》
北大核心
2013年第2期35-40,共6页
World Bridges
关键词
斜塔斜拉桥
参数分析
温度
自重
索力
施工控制
有限元法
cable-stayed bridge with inclined pylon
parametric analysis
temperature
dead weight
cable force
construction control
finite element method
