以巫峡长江大桥为研究背景，分别研究几何非线性以及几何和材料双重非线性对大桥拱肋在静风荷载作用下内力与位移响应的影响。结果表明：在静风荷载作用下，几何非线性和双重非线性对该桥拱顶的横向位移和扭转位移以及拱肋的面外弯矩影响比较显著，故在进行大跨度钢管混凝土拱桥静风响应分析时不可忽略非线性的影响。%Taking the Wu Gorge Bridge over Yangtse River as the research background, the effect of geometrical nonlinearity and geometric and material double nonlinear to the internal force and displacement response of the arch rib of the bridge under the action of static wind load were studied. The results showed that: under the static wind load, geometry nonlinear and double non-linear have an obvious influence on the lateral displacement, the torsion displacement and the out-of-plane bending moment of the arch. The influence of the nonlinearity can not be ignored in the process of long-span concrete-filled steel tube arch bridge static wind response analysis.
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