新京航运河大桥抗震性能分析

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英文篇名：Aseismic Performance Analysis of Great Bridge of Jinghang Canal 中文刊名：中国市政工程 英文刊名：China Municipal Engineering 作者：马军伟 英文作者：MA Jun-wei (Shanghai Urban Construction Design & Research Institute ; Shanghai 200125 ; China) 中文关键词：大跨度预应力连续梁桥 ; 新京航运河大桥 ; 减隔震设计 ; E型钢阻尼器 英文关键词：large span prestressed continuous girder bridge ; Great Bridge of Jinghang Canal ; aseismatic design ; E-shape steel elastic/plastic damper 出版日期：2011-04-25 机构：上海市城市建设设计研究总院; 年：2011 期：02 出版单位：中国市政工程

摘要

根据JTG/T B02-01—2008《公路桥梁抗震设计细则》,新京航运河大桥主墩高仅3.6 m,属于矮墩,其地震结构的频率很高,在E2的地震作用下混凝土又不允许出现塑性破环,因此,必须进行减隔振设计。该桥选用了在国内有过应用先例的E型钢弹塑性阻尼器作为减震设备。在地震发生时E型钢阻尼器发生弹塑性变形,从而将输入桥梁结构的大部分地震能量吸收掉,将上部结构传递至桥墩的地震力保持在一定的水平内,保证了桥墩和桩基的安全,达到减振的目的。
According to JTG/T B02-01—2008 Guidelines for Seismic Design of Highway Bridge,the main pier of Great Bridge of Jinghang Canal is only 3.6 m,belonging to the lower pier,which means its frequency of seismic structure is high.The concrete structure is not allowed to appear plastic destruction under the earthquake action of E2.Therefore,the design for reducing seismic effect should be considered.E-shape steel elastic/plastic damper is chosen for this bridge for it has been used once as the aseismatic instrument in China.During the earthquake,E-shape steel elastic/plastic damper can appear plastic destruction,which can absorb most amount of earthquake energy transferring the bridge structure and can sustain the force from superstructure to the pier steadily.The security of the piers is ensured as well as the pile foundations,achieving the aseismatic purpose.

引文

[1]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001.
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    [3]范立础,王志强.桥梁减隔振设计[M].北京:人民交通出版社,2001.