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考虑施工过程中结构体系不断变化、荷载逐步增加以及拱桥结构大位移等因素 ,建立了大跨度拱桥结构的非线性稳定计算模型 ,编制了相应的程序 .文中对某拱桥施工全过程的稳定性和几何非线性进行了模拟计算 ,得出了各个施工阶段稳定安全和非线性影响系数 ;计算结果为该大桥设计和施工提供了理论依据
Considering the changes of structural system, load and the large displacement of arch bridge during construction, the nonlinear stability calculation model of long-span arch bridge is established and the corresponding program is compiled.In this paper, the stability of a whole arch bridge construction, Geometric nonlinearity were simulated and the stability and nonlinearity influence coefficients of each construction stage were obtained. The calculation results provided a theoretical basis for the design and construction of the bridge