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为分析预应力桁式组合拱桥病害(大桥新拱脚,拱顶实腹段,空实腹交接处虎口位置和拱上腹杆等存在裂缝)出现的原因,对桁式组合拱桥计算模型、计算参数和计算方法进行了研究,提出了一种针对既有桁式组合拱桥的计算模式,工程实例验算结果表明:该计算方法与现有结构情况吻合良好,较好地反映了结构的受力状态。
In order to analyze the reasons for the occurrence of the prestressed truss composite arch bridge disease (such as the new arch foot, the real and abdomen of the arch, the location of the tiger’s mouth in the empty and solid abdomen junction, and the web upper web), the calculation model of the truss composite arch bridge Parameters and calculation methods are studied, and a calculation model for the existing trussed composite arch bridge is proposed. The calculation results of engineering examples show that the calculation method is in good agreement with the existing structure and well reflects the stress state of the structure .