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本文采用变位法逐步逼近的原理计算桁架拱桥的徐变影响。讨论了桁架拱桥不同施工方法、组合断面,桥台位移等内力因徐变而产生重分布现象。所得结论可供桁架拱设计时参考使用。徐变影响计算方法对箱型拱等其他结构体系亦有参考价值。
In this paper, the principle of gradual approximation of displacement method is used to calculate the influence of the creep of truss arch bridge. Discuss the different construction methods of truss arch bridge, combined section, abutment displacement and other internal forces due to creep and redistribution phenomenon. The conclusions can be used for truss arch design reference. Creeping influence calculation method also has reference value to other structural systems such as box arch.