力学与实践 ›› 2017, Vol. 39 ›› Issue (1): 40-44.DOI: 10.6052/1000-0879-16-205

• 应用研究 • 上一篇    下一篇

近断层地震作用下钢筋混凝土连续梁桥地震易损性分析

刘强, 王妙芳, 严通梅   

  1. 集美大学工程技术学院, 福建厦门 361021
  • 收稿日期:2016-06-20 修回日期:2016-10-31 出版日期:2017-02-15 发布日期:2017-02-24
  • 通讯作者: 刘强,教授,博士,主要从事地震工程、工程抗震与减震控制研究.E-mail:liutanq007@aliyun.com
  • 基金资助:

    福建省自然科学基金(2016J01242)、福建教育厅自然科学基金(JA13188)和福建省大学生创新创业基金(201610390069)资助.

SEISMIC FRAGILITY OF THE RC CONTINUOUS GIRDER BRIDGE UNDER NEAR-FAULT GROUND MOTIONS

LIU Qiang, WANG Miaofang, YAN Tongmei   

  1. College of Engineering Technology, Jimei University, Xiamen 361021, Fujian, China
  • Received:2016-06-20 Revised:2016-10-31 Online:2017-02-15 Published:2017-02-24

摘要:

考虑桥墩、支座构件及主梁的碰撞损伤指标,对钢筋混凝土连续梁桥进行了地震易损性分析.综合考虑了结构参数的不确定性,从太平洋地震工程研究(Paciflc earthquake engineering research,PEER)数据库中随机选取了20条近场地震记录,得到大量的随机地震-结构样本.结合不同破坏状态下的桥梁损伤指标,根据结构的能力与需求得到了桥梁各构件及整体桥梁结构的地震易损性曲线.从概率意义上判断在强烈地震作用下桥梁结构所处的破坏状态,为今后在役的同类型桥梁震害预测提供了参考.

关键词:

钢筋混凝土连续梁桥|近场地震|地震易损性分析|损伤指标|桥墩

Abstract:

The seismic fragility of a RC (reinforced concrete) continuous girder bridge is analyzed, with consideration of damages of bridge piers, bearing components and the collision of the main beam. In view of the structural parameter randomness of the bridge structure, 20 near-fault ground motions are selected from the PEER(Paciflc Earthquake Engineering Research database), and a large number of random structure samples are established. Using the bridge damage index under difierent damage states, the fragility curves of the bridge components and the bridge system are obtained based on the structure of the capacity and the demand. According to the actual seismic demand of similar as-built bridges, the damage states can be obtained in the sense of probability, and provide a reference for future seismic damage predictions.

Key words:

RC (reinforced concrete) continuous girder bridge|near-fault ground motions|seismic fragility analysis|damage index|pier

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