上承式拱桥横向稳定性分析

Analysis on Transverse Stability of Deck Arch Bridges

综合考虑几何非线性和材料非线性对混凝土拱桥稳定性的影响,结合金沙江通阳大桥实例,对拱箱吊装合龙时的最不利阶段及成桥状态下的稳定性进行了分析.得出结论:在分析拱桥的稳定性时,可不考虑几何非线性的影响,但材料非线性的影响不能忽略.

Taken into account synthetically are the influences of geometrical nonlinearity and material nonlinearity on the steadiness of concrete arch bridges. On the basis of the engineering case of Tongyang major bridge on Jinsha River, analysis is carried out on the most adverse stage to the hoisting and closure of arch boxes and the stability under conditions of the completed bridge. The conclusion is drawn that, in analysing the stability of arch bridges, the influences of geometrical nonlinearity may not be considered, while those of material nonlinearity cannot be neglected.