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为研究系梁对高墩刚构桥抗震性能的影响,以系梁设置位置、系梁与桥墩截面刚度比以及系梁模拟方式为基本参数,通过分析结构动力特性及地震响应的变化,研究系梁对结构抗震性能的影响。研究结果表明:设置系梁后,桥梁的横桥向抗震性能降低,桥墩和系梁均成为抗震设计的薄弱环节;从提高结构整体抗震性能的角度出发,在墩中设置系梁效果最优,其中系梁与桥墩截面刚度比取0.5效果最优;系梁端部出现塑性铰后,对结构抗震性能的影响很小,可预先将系梁设计为与墩身铰接,以兼顾静力性能、动力性能和稳定性要求。
In order to study the effect of tie beam on the seismic performance of rigid frame bridge with high pier, taking the location of tie beam, the stiffness ratio of tie beam and bridge pier as a cross section and the simulation method of tie beam as the basic parameters, by analyzing the structural dynamic characteristics and the change of seismic response, Influence of Beams on Seismic Performance of Structures. The results show that the anti-seismic performance of the bridge after transverse girder bridge is reduced and the pier and girder are both the weak points in the seismic design. The angle between the pier and the girder is the best, Among them, the effect of the ratio of the cross-section rigidity of the tie beam to the bridge pier is the best. When the plastic hinges at the ends of the tie beam have little effect on the seismic performance of the structure, the tie beam can be designed to be articulated with the pier body in advance to balance static performance, Dynamic performance and stability requirements.