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结合拟建的天兴洲三主桁公铁两用结合梁斜拉桥,建立了大跨度公铁两用斜拉桥空间计算模型,并对其在恒载、活载、温度作用下静力性能进行了研究.重点探讨了不同主梁纵向约束方式对大跨度公铁两用斜拉桥静力性能的影响以及主梁合理纵向约束刚度.计算结果表明:对主梁设置合理纵向约束刚度,能使结构的受力性能得到改善.
Combined with the proposed Tianxingzhou three main girder composite cable-stayed bridge, the space calculation model of long-span cable-stayed bridge is set up and its static load The paper studies the influence of longitudinal restraint modes of different main girders on the static performance of long-span railway cable-stayed bridge and the reasonable longitudinal restraint stiffness of the main girder.The results show that reasonable longitudinal restraint stiffness, Can make the structure of the stress performance improved.