【摘要】 以西安市某座抗震加固桥为列,分别以系梁设置位置、系梁刚度大小来探讨系梁对柱式桥墩抗震性能的影响,研究结果表明系梁对纵桥向振动没有影响,而对横桥向振动有较大影响,增加横桥向刚度,减小1、2阶横向振型的振动周期;选择系梁在桥墩中心可以提前使系梁在地震作用下进入塑性状态,消耗地震能量,利于抗震;当横系梁的高度选择为0.7D~0.85D,宽度选择为0.6D~0.75D时,对桥梁抗震有利。更多还原

【Abstract】 Taking a seismic reinforcement bridge in Xi’an for example, this paper studied the effect of the location and stiffness of tie beam on column piers seismic behavior. The results showed that tie beam had no effect on the longitudinal vibration of the bridge, but had a great impact on the lateral vibration of the bridge. First-order and second-order of transverse vibration period could reduce by increasing the transverse stiffness. Setting the tie beam at the center of pier could advance the tie beam enter into the plastic state under earthquakes and consume the earthquake energy. When the height of beam was 0.7D~0.85 D and the width was 0.6D~0.75 D, it was beneficial to bridge seismic.更多还原