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多孔大跨度连续梁桥减隔震技术应用研究

, PP. 58-65

Keywords: 桥梁工程,多孔大跨度连续梁桥,模型试验,减隔震设计,摩擦支座,阻尼器

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Abstract:

?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。

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