[1]杨华平,钱永久,樊启武,等.近断层区域减隔震铁路桥梁地震动强度指标选取研究[J].地震工程与工程振动,2017,01(6):031-42.[doi:10.13197/j.eeev.2017.06.31.yanghp.004]
 YANG Huaping,QIAN Yongjiu,FAN Qiwu,et al.Selection of ground motion intensity measure for seismic isolated railway bridges in near-fault regions[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2017,01(6):031-42.[doi:10.13197/j.eeev.2017.06.31.yanghp.004]
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近断层区域减隔震铁路桥梁地震动强度指标选取研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
01
期数:
2017年6
页码:
031-42
栏目:
论文
出版日期:
2017-12-31

文章信息/Info

Title:
Selection of ground motion intensity measure for seismic isolated railway bridges in near-fault regions
作者:
杨华平1 钱永久1 樊启武2 龚婉婷1 黎璟1
1. 西南交通大学 土木学院, 四川 成都 610031;
2. 核工业西南勘察设计研究院, 四川 成都 610031
Author(s):
YANG Huaping1 QIAN Yongjiu1 FAN Qiwu2 GONG Wanting1 LI Jing1
1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. Nuclear Industry Southwest Survey & Design Institute, Chengdu 610031, China
关键词:
地震动指标近断层区域减隔震桥梁脉冲型地震动
Keywords:
intensity measurenear-fault regionisolated bridgepulse-like ground motion
分类号:
P319.5
DOI:
10.13197/j.eeev.2017.06.31.yanghp.004
摘要:
为选取适用于近断层区域减隔震铁路桥梁的地震动强度指标,完善近断层区域减隔震桥梁基于性能抗震设计方法,从NGA-West2数据库中选取了236条近断层脉冲地震记录作为输入地震激励,采用单自由度Bouc-Wen非线性模型模拟减隔震桥梁力学特性,应用MATLAB编制计算程序,对强度折减系数R=1~8,初始周期在0.5~3 s范围内的Bouc-Wen单自由度模型进行了非线性时程分析。然后选用位移响应峰值结果作为地震工程需求参数,基于相关性、可行性、有效性三项评判准则评价了25个地震动强度指标的合理性。研究结果表明:近断层区域,短周期(0.5~1 s)减隔震桥梁选用有效峰值速度EPV进行抗震分析和评估较为合理;中等周期(1~2 s)减隔震桥梁宜选用Fajfar指标IF;有效峰值位移EPD可作为长周期(2~3 s)减隔震桥梁抗震分析和评估推荐指标;在全部周期(0.5~3 s)范围内,峰值速度PGV均适用。
Abstract:
The purpose of this essay isto select the appropriate ground motion intensity measures(IMs)and improve performance-based seismic design method for isolated bridges in near-fault regions. 236 pulse-like seismic records were chose from NGA-West2 database as input seismic excitations. The nonlinear Bouc-Wen single degree freedom model was applied to simulate the mechanical characteristic of isolated bridge.Under situations of R=1~8, Bouc-Wen SDOF models(initial periods in the range of 0.5~3 s)were conducted nonlinear time-history analysis by MATLAB program. The peak displacement response was selected as earthquake engineering demand parameter.Rationality of 25 IMs were assessed based on three criterions:relativity, feasibility and validity. The results showed that:in near fault regions,it is more appropriate to select EPV as IM to conduct seismic analysis and assessment for short periods (0.5~1 s)isolated bridges; Fajfar index IF could be selected for medium periods (1~2 s)isolated bridges; EPD is recommended as IM for long periods (2~3 s)isolated bridges; PGV are applicable in whole period (0.5~3 s) range.

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备注/Memo

备注/Memo:
收稿日期:2017-03-11;改回日期:2017-05-21。
基金项目:中国工程院咨询研究项目(2015-05-ZD-002)
作者简介:杨华平(1989-),男,博士研究生,主要从事桥梁抗震研究.E-mail:hpbridge@163.com
更新日期/Last Update: 1900-01-01