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考虑结构的材料非线性和几何非线性,通过对协作体系金马大桥进行全过程非线性分析,得到了结构的极限承载力。研究了混凝土收缩徐变、加劲梁配筋率、斜拉索的安全系数、加载方式等因素对协作体系桥梁的极限承载力的影响,结果表明斜拉索的设计安全系数是很重要的影响因素,应加以重视;全桥和半桥加载时,弹塑性极限活荷载安全系数分别为21.4和9.67,表明金马大桥这种协作体系具有良好的极限承载能力;其弹塑性极限承载力远小于弹性极限承载力,研究结果可以为同类桥梁工程的设计和计算提供参考。
Taking into account the material nonlinearity and geometric nonlinearity of the structure, the ultimate bearing capacity of the structure is obtained through the whole process nonlinear analysis of the linkage system Jinma Bridge. The influence of shrinkage and creep of concrete, reinforcement ratio of reinforcement beam, safety coefficient of stay cable, loading method on the ultimate bearing capacity of the bridge was studied. The results show that the design safety factor of the stay cable is a very important factor , It should be paid attention to. When the full bridge and the half bridge are loaded, the safety coefficients of the elastic-plastic limit live load are respectively 21.4 and 9.67, indicating that the cooperation system of the Jinma Bridge has a good ultimate bearing capacity and its elastic-plastic ultimate bearing capacity is far less than the elastic limit Bearing capacity, the research results can provide reference for the design and calculation of similar bridge projects.