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无伸缩缝梁桥抗震性能与设计计算方法研究

DOI: 10.13197/j.eeev.2015.05.15.huangfy.003, PP. 15-22

Keywords: 无缝桥,混凝土桩基础,抗震性能研究,简化抗震计算方法,桥台结构-桩-土动力相互作用

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Abstract:

无缝桥整体性好、行车舒适、后期养护维修少,地震作用下不易落梁,"小震不坏、大震不倒",具有可持续、高耐久与较强的防灾减灾能力。不过,桥台桩基是此类型桥梁的最不利部位。国外无缝桥的桥台桩基多采用H型钢,然而,我国主要以混凝土桩为主,两者在"中震可修与易损性"上存在一定差异。目前,对混凝土桩基的无缝桥抗震性能尚缺乏深入系统的研究,抗震规范也未给出相应的设计计算方法,影响了其应用与发展。为此,本文综述了无缝桥抗震性能特点与设计计算方法的研究现状,提出了无缝桥抗震性能的主要研究方向与简化抗震设计计算方法,可为此类型桥梁抗震规范的制定提供参考。

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