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千米级斜拉桥的纵向减震体系研究

DOI: 10.13197/j.eeev.2015.06.64.hanzf.009, PP. 64-70

Keywords: 千米级斜拉桥,纵向减震,弹性连接装置,黏滞阻尼器,梁端位移

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Abstract:

针对漂浮型的千米级斜拉桥,研究地震作用下减小梁端纵向位移和主塔内力的方法。首先阐述了该类桥梁的纵向减震机理和方法;其次根据现有的理论和技术水平,在塔梁之间分别采用弹性连接装置、流体黏滞阻尼器、以及弹性连接装置与流体黏滞阻尼器组合的3种连接方式,设计了3种纵向减震体系;然后建立了千米级斜拉桥的有限元模型,分别采用上述3种纵向减震体系,进行了一系列动力分析,同时研究了纵向减震参数设置;最后,对模型计算结果进行了比较和讨论,并建议了千米级斜拉桥纵桥向的合理减震结构体系。

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