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采用MIDAS/Civil有限元软件建立傅山路云中河大桥——5跨下承式复式钢箱系杆拱梁组合桥的空间有限元计算模型,分2种工况计算该桥在永久作用效应和永久作用效应+可变作用效应下的桥梁力学性能,计算结果表明:该下承式复式钢箱系杆拱梁组合桥的主梁最大压应力值为-14MPa,拱肋最大压应力值为-148MPa,均小于材料的设计抗压强度;吊杆安全系数最小值为3.1,满足桥梁规范关于吊杆最小安全系数不得小于2.5的规定,具有较大的安全储备;该桥梁在汽车荷载作用下位移满足桥梁设计规范关于正常使用极限状态下的变形要求;并采用Lanczos法对该桥进行动力特性分析。计算结果已为该拱桥的设计复核提供了参考。
Using finite element software MIDAS / Civil to establish the finite element model of Fuzhong Road Yunzhonghe River Bridge - 5 span composite steel box tied arch bridge composite beam, in two kinds of conditions to calculate the permanent effect of the bridge and The results show that the maximum compressive stress of the main girder is -14MPa and the maximum compressive stress of the arch rib is - 148MPa, are less than the compressive strength of the design of the material; boom minimum safety factor of 3.1 to meet the bridge norms on the minimum safety factor of the boom not less than 2.5 provisions, with a large safety reserve; the bridge under the action of the vehicle load displacement Meet the bridge design specifications on the normal use of the limit state of the deformation requirements; and Lanczos method of the bridge dynamic analysis. The calculation results have provided reference for the design review of the arch bridge.