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Journal of Chongqing Jiaotong University(Natural Science)

Journal of Chongqing Jiaotong University(Natural Science) ›› 2009, Vol. 28 ›› Issue (4): 646-651.DOI: 10.3969/j.issn.1674-0696.2009.04.02

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Shaking?Table?Tests?on?Single-Column-Bent?Double-Deck??Viaduct?Pier?Model?-?II?：Structural?Seismic?Response

PENG Kai1, 2, LI Jian-zhong1, ZHU Yu3, GUAN Zhong-guo1   

  1. 1.?Department?of?Bridge?Engineering,Tongji?University,Shanghai?200092,China;?2.?School?of?Civil?Engineering?＆?Architecture,?Chongqing?Jiaotong?University,?Chongqing?400074,?China?;??3.?Anhui?Communications?Consulting?＆?Design?Institute,?Anhui?Hefei?230031,?China
  • Received:2008-12-29 Revised:2009-03-04 Online:2009-08-15 Published:2015-04-15

独柱双层高架桥墩柱振动台试验研究Ⅱ: 结构地震反应

彭凯1,2,李建中1,朱宇3,管仲国1   

  1. 1.同济大学桥梁工程系,上海200092;2.重庆交通大学土木建筑学院,重庆400074; 3安徽省交通规划设计研究院,安徽合肥230031
  • 作者简介:彭凯(1974—),男,重庆市人,副教授,博士研究生,主要从事桥梁抗震、减隔震等方面的研究。E-mail:piqueun@i163.com。
  • 基金资助:
    国家自然科学基金项目( 50578168)

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Abstract: On?the?shaking?table?a?series?of?simulative?seismic?waves?are?input?to?simulate?a?single-column-bent?double-deck?viaduct?pier?model?with?structural?seismic?responses,?including?the?horizontal?accelerations?and?displacements,?etc.?The?seismic?bending?moments?at?the?column?base?and?mutation?section?of?pier?are?evaluated,?and?the?developing?trend?of?structural?damage?is?analyzed.?The?results?indicate?that：the?horizontal?seismic?response?of?single-column-bent?double-deck?viaduct?mainly?lies?on?the?contributions?from?the?first?two?free-vibration?modes?in?the?corresponding?direction;during?the?ordinal?input?of?amplitude-modulated?seismic?waves,?damage?index?of?the?cracked?structure?increases?piecewise?linearly?with?magnification?of?the?maximum?seismic?displacements?along?the?key?degrees?of?freedom,?and?levels?off?when?the?expected?plastic?hinge?area?approximates?yielding?state,?then?the?column?cross-section?effective?bending?rigidity?might?be?reasonably?decided?through?sectional?moment-curvature?analysis

Key words: single-column-bent double-deck viaduct ;shaking table test , seismic response , higher-order vibration modes , structural damage ;

摘要： 对独柱双层高架桥墩柱模型进行了模拟地震振动台试验,测试了结构水平向加速度、位移等反应数据,据此 计算了墩底和墩身突变截面的地震弯矩,分析了结构损伤发展趋势。结果表明:独柱双层高架桥在水平方向的地 震反应主要取决于对应方向前2阶振型贡献;墩柱开裂后,随调幅地震波的次第输入,结构损伤指标随关键自由度 最大地震位移增长呈分段线性、梯级上升趋势,并在接近屈服前收敛为常数,此时墩柱截面有效刚度宜根据截面弯 矩曲率关系分析确定。

关键词: 独柱双层高架桥, 振动台试验, 地震反应, 高阶振型, 结构损伤

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