高速铁路钢管混凝土系杆拱桥吊杆纠偏分析

以高速铁路上某钢管混凝土系杆拱桥为实例,分析该桥吊杆偏位的原因及其影响,并对其成桥及运营各时期监测索力的差别进行判别,采用有限元软件Midas/Civil建立该下承式钢管混凝土系杆拱桥的空间有限元计算模型,根据索力监测数据结果通过迭代计算得出相应时期的拱桥状态,分析该拱桥在吊杆纠偏工况下的桥梁结构安全及其变形对列车运营安全的影响,并为后续的纠偏施工给出具体的操作建议,所得结果可用于指导该桥的吊杆纠偏施工,并可为同类桥梁的施工积累更多的可供借鉴的理论和实践经验。

Analysis on Rectification of Tied Concrete-filled Steel Tubular Arch Bridge on High-speed Railway

This paper discusses the cause and influence of the rectification of the tied concrete- filled steel tubular arch bridge suspender of high-speed railway and confirms the differences of suspender tensile forces measured in different periods. The finite element program MIDAS / Civil is used to establish the spatial finite element calculating models of the concrete filled steel tubular arch bridge and the measured suspender tensile force is used to define the corresponding state of the arch bridge by way of successive iterations. The influence of suspender rectification on the safety of bridge structure and train operation is analyzed and specific operation suggestions are offered. The calculating results can be used to guide suspender rectification of arch bridges and provide adoptable theories and practical references for the construction of similar bridges.