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为了探索支座纵向摩阻力对该桥受力性能的影响,对主梁的支座按照纵向约束刚度的不同设定了5种纵向约束工况来模拟支座的纵向摩阻力,分别分析各工况下恒载和活载在主梁控制断面和塔底产生的内力、塔顶产生的纵向位移、斜拉索索力等,总结出了不同纵向约束方式下桥梁受力性能的变化规律;然后根据该桥的荷载试验结果,确定了相对合理的纵向约束方式;最后提出利用该类型支座在以后此类桥梁的设计中需要注意的问题.该研究成果为使用此类型支座桥梁的计算分析提供了技术参考.
In order to explore the impact of the bearing longitudinal frictional resistance on the mechanical behavior of the bridge, five kinds of longitudinal restraining conditions were set according to the different longitudinal restraining stiffness of the main girder to simulate the longitudinal frictional resistance of the bearing. Under constant load and live load in the control section of the main beam and the bottom of the force generated by the tower, the top of the longitudinal displacement generated, cable tension cable, etc., summed up the different longitudinal restraint under the bridge force performance changes; and then according to The result of the load test of the bridge confirms a relatively reasonable longitudinal restraint method. Finally, some problems that need attention should be paid to the design of this kind of bridge using this type of support. The research results provide the calculation and analysis for the bridge with this type of support Technical reference.