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以一座多孔大跨度连续梁桥为工程背景,研究了抗震分析中是否考虑摩擦支座的摩擦效应对分析结果的影响,以及采用摩擦支座并联阻尼器和双曲面球型减隔震支座2种减隔震方案的减震效果。结果表明:对于多孔大跨度连续梁桥,考虑摩擦效应后固定墩的地震力显著小于不考虑时的分析结果;在考虑摩擦效应的基础上,2种减震方案均可减小固定墩的地震反应,而双曲面球型减隔震支座方案具有更优的减震效果;摩擦支座并联阻尼器方案减震效果不佳的主要原因是支座摩擦力和阻尼器阻尼力间存在90°的相位差。
Taking a multi-span long-span continuous girder bridge as the engineering background, the influence of the friction effect of the friction bearing on the analysis results is considered in the seismic analysis, and the friction damper with parallel damper and the hyperboloid ball-bearing vibration isolation bearing 2 Vibration reduction program damping effect. The results show that for the long-span continuous girder bridge with multi-span, the seismic force of the fixed pier considering the friction effect is significantly smaller than that of the unconfirmed one. Based on the friction effect, the two kinds of damping schemes can reduce the earthquake of the fixed pier While the hyperboloid ball-type seismic isolation bearing scheme has better damping effect. The main reason for the poor damping effect of the parallel damper scheme with friction bearings is the existence of 90 ° between the frictional force of the bearing and the damping force of the damper The phase difference.