人字桥梁多维地震作用下振动台试验研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (15) : 103-108.

论文

人字桥梁多维地震作用下振动台试验研究

李青宁1，尹俊红1，闫磊1 ，程麦理1，廖鑫1 ，张瑞杰1，李桅2

作者信息 +

Shaking Table Experimental Study on Y-Shape Bridge under Multi-Dimensional Excitation

LI Qingning1 YIN Junhong1 YAN Lei1 CHENG Maili1 Liao Xin 1 ZHANG Ruijie1 LI Wei2

Author information +

文章历史 +

摘要

按1/20的几何比例制作一典型人字曲线桥梁模型,进行了多维振动台试验，并针对试验模型建立数值分析模型，研究人字曲线桥梁在多维地震作用下的地震响应特点。结果表明，竖向地震分量对桥墩顶纵桥向加速度、主梁分支处两桥墩横桥向相对位移和墩底纵桥向弯矩基本无影响，结构响应与输入地震波的频谱特性和结构形式有关；单向激励下，墩顶纵桥向加速度、分支处桥墩横桥向相对位移和墩底纵桥向弯矩响应都为最大；双向和三向激励都使墩顶纵桥向加速度响应降低，且降低幅度随着墩与直梁正向角度的增加而增加；主梁与分支直梁应设置的初始间隙应大于主梁与分支曲梁。

Abstract

A scale 1/20 model of typical Y-shaped curved bridge was produced and studied under multi-dimensional shaking table test，numerical analysis model was established for experimental model,the seismic response characteristics of Y-shaped curve bridge under multi-dimensional excitation was studied.The results show that longitudinal acceleration response to the bridge、transverse relative displacement to bridge between two piers at branch straight beam and longitudinal bending moment at pier bottom is not associated with vertical seismic input，structural response is associated with seismic spectrum of input seismic and structure form；Maximum response of longitudinal acceleration to the bridge、transverse relative displacement to bridge between two piers at branch straight beam and longitudinal bending moment at pier bottom are appeared under unidirectional excitation；Longitudinal acceleration response to the bridge is lower under bidirectional excitation and three-dimensional excitation，and the degree of reduction decreases with an increasing of the angle between pier and straight beam；Initial gap width between main beam and branch straight beam is setted larger than main beam and branch curve beam.

导出引用

李青宁1，尹俊红1，闫磊1,程麦理1，廖鑫1,张瑞杰1，李桅2. 人字桥梁多维地震作用下振动台试验研究[J]. 振动与冲击, 2015, 34(15): 103-108

LI Qingning1 YIN Junhong1 YAN Lei1 CHENG Maili1 Liao Xin 1 ZHANG Ruijie1 LI Wei2. Shaking Table Experimental Study on Y-Shape Bridge under Multi-Dimensional Excitation[J]. Journal of Vibration and Shock, 2015, 34(15): 103-108

参考文献

[1] 卢彭真，张俊平，赵人达.典型人字形桥梁模型试验研究与分析[J].工程力学,2008,25(3):139-143.
LU Peng-zhen,ZHANG Jun-ping, ZHAO Ren-da.Analysand Study On Model Experiment of Typical
Y-Shape Bridge[J].Engineering Mechanics,2008,25(3):139-143.
[2] Saiidi M S, Vosooghi A, Choi H, et al. Shake Table Studies and Analysis of a Two-Span RC Bridge Model Subjected to a Fault Rupture[J]. Journal of Bridge Engineering, 2013.
[3] Saiidi M S, Vosooghi A, Nelson R B. Shake-Table Studies of a Four-Span Reinforced Concrete Bridge[J].Journal of Structural Engineering, 2012, 139(8): 1352-1361.
[4] 宋旭明,戴公连,方淑君.三汊矶湘江大桥整体模型试验[J]. 中国公路学报,2009,22(1):53-59.
SONG Xu-ming,DAI Gong-lian,FANG Shu-jun.Total Bridge Model Test of Sanchaji Xiangjiang Bridge[J].China Journal of Highway and Transport,2009,22(1):53-59.
[5] 瞿伟廉,孙五一,周强.万州长江大桥欠质量模型振动台试验研究[J]. 武汉理工大学学报,2005,8,27(8):45-67.
QU Wei-lian,SUN Wu-yi,ZHOU Qiang.Shaking Table Test Research on Insufficient-mass Model of Wanzhou Yangtze River Bridg[J].Journal of Wuhan university of technology,2005,8,27(8):45-67.
[6] 钟栋青,王曙光,刘伟庆.连续梁桥纵向减震性能振动台试验与理论分析[J].土木工程学报,2012,45(11).
ZHONG Dong-qing,WANG Shu-guang,LIU Wei-qing.Shaking table experimental study and theoretical analysis of the longitudinal seismic-reduced behavior of continuous-beam bridges[J]. China Civil Engineering Journal,2012,45(11).
[7] D Williams, W. Godden. Seismie Response of Long Curved Bridge Structures: Experimental Model Studies. Earthquake Engineering and Structural Dynamics[J]. 1979.7:107-128.
[8] 王蕾.大跨度刚构桥地震响应分析及振动台试验研究[D].北京交通大学,2010.
WANG Lei.Seismic Response Analysis of Long-span Rigid-frame Bridge and the Shading Table Model Test[D]. Beijing Jiaotong University,2010.
[9] Wieser J, Zaghi A E, Maragakis M, et al. A Methodology for the Experimental Evaluation of Seismic Pounding at Seat-Type Abutments of Horizontally Curved Bridges[J]. Bridges, 2014, 10: 9780784412367.055.
[10] 沈朝勇,周福霖,黄襄云,罗学海,任珉,陈建秋,王豫. 动力试验模型用微粒混凝土的初步试验研究[J].广州大学学报(自然科学版),2005,03:249-253.
SHEN Chao-yong,ZHOU Fu-lin,HUANG Xiang-yun,et al. Experimental research on mircroconcrete used in dynamic test model[J].Journal of Guangzhou University(Natural Science Edition),2005,03:249-253.
[11] 周颖，吕西林.建筑结构振动台模型试验方法与技术[M].北京：科学出版社，2012.
ZHOU Ying，Lu Xi-lin.Test methods and technique of building structure vibration table model[M]. Science Press，2012.
[12] Papazoglou A J, Elnashai A S. Analytical and field
evidence of the damaging effect of vertical earthquake ground motion[J]. Earthquake Engineering and Structural Dynamics, 1996, 25(10): 1109-1138.
[13] Kunnath S K, Erduran E, Chai Y H, et al. Effect of
near-fault vertical ground motions on seismic response of highway overcrossings[J]. Journal of Bridge Engineering, 2008, 13(3): 282-290.