简支梁桥采用减隔震装置后抗震性能分析

详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文

英文篇名：On Anti-seismic Performance Analysis of Simple Supported Beam Bridge with Seismic Isolation Device 中文刊名：中国市政工程 英文刊名：China Municipal Engineering 作者：吴勇 英文作者：WU Yong(Shanghai Urban Construction Design & Research Institute ; Shanghai 200125 ; China) 中文关键词：高架桥 ; 隔震支座 ; 铅芯橡胶支座 ; 地震 英文关键词：viaduct bridge ; seismic isolation bearing ; lead rubber bearing ; earthquake 出版日期：2012-06-25 机构：上海市城市建设设计研究总院; 年：2012 期：03 出版单位：中国市政工程

摘要

介绍了桥梁隔震的概念。以3座不同柱高的城市高架桥工程为实例,分别采用板式橡胶支座和铅芯橡胶支座隔震装置。研究采用隔震装置的高架桥地震反应计算表明:随着立柱的高度增加,结构的柔性增大,桥梁的抗震性能也越好;采用铅芯橡胶支座后,桥梁地震响应明显降低,桥梁抗震性能显著增强。以上海软土地基为基准刚度,研究了基础弹性刚度对采用铅芯橡胶支座桥梁地震响应的影响。结果表明:当基础弹性刚度小于基准值的5倍时,应考虑基础的弹性影响;当刚度大于基准值的5倍时,其影响甚微。
The concept of bridge seismic isolation is introduced in this paper.Taking three urban viaduct bridges projects with different column depth for example,the three bridges are adopting laminated rubber bearing and lead rubber bearing separately.The related earthquake response calculation of viaduct bridges with seismic isolation device can show that,1) with the column height increasing,the flexibility of structure is increased and anti-seismic performance of bridge is better;2) by adopting lead rubber bearing,bridge earthquake response is reduced and anti-seismic performance is strengthened obviously.With Shanghai soft soil foundation as a benchmark stiffness,the influence to bridge(with lead rubber bearing) earthquake response by foundation flexible stiffness is researched.The results can show that,1) when foundation flexible stiffness is less than 5 times of reference value,flexibility influence of foundation shall be considered;2) when the stiffness is more than 5 times of reference value,the influence can be ignored.

引文

[1]范立础.桥梁抗震[M].上海:同济大学出版社,1997.
    [2]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001.
    [3]马坤全,陈文艳.轨道交通高架桥合理抗震设计参数及抗震措施研究[J].中国铁道科学,2001(4):64-67.