斜交简支梁桥纵向地震碰撞反应精细化研究

王军文1,2,吴天宇1,2,李少华1,2,李建中3

振动与冲击 ›› 2016, Vol. 35 ›› Issue (8) : 194-200.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (8) : 194-200.
论文

斜交简支梁桥纵向地震碰撞反应精细化研究

  • 王军文1,2,吴天宇1,2,李少华1,2,李建中3
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Refined Study on Longitudinal Seismic Pounding Responses of Simply-Supported Skewed Girder Bridge

  • WANG Jun-wen1,2, WU Tian-yu1,2, LI Shao-hua1,2,LI Jian-zhong3
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摘要

为精细化分析简支斜交桥地震碰撞反应,首先基于Hertzdamp碰撞理论,采用开放式地震模拟软件OpenSees建立能够考虑碰撞过程中摩擦作用的简支斜交桥精细化计算模型;然后从动力特性、动力反应层面验证模型的可靠性;最后采用三维精细化计算模型分析斜度、摩擦对斜交简支梁桥纵向地震碰撞反应的影响。结果表明:梁体与桥台间最大碰撞力的产生位置随着斜度的变化而改变;最大碰撞力的大小不仅与斜度有关,而且与斜交桥梁端与桥台间摩擦系数也存在一定关系;摩擦作用削弱了斜度对梁端锐角处纵向最大位移的影响,大幅度减少上部结构峰值转角,使峰值转角最大值滞后在较大斜度时出现;不考虑摩擦作用会高估锐角处梁端纵向最大位移反应。

Abstract

For refined study the seismic pounding responses of the simply-supported skewed girder bridge(SSGB), firstly, based on the Hertzdamp pounding theory, a refined calculation model considering the friction effect during the collision for SSGB was built by open source seismic software OpenSees; then the reliability of the model was verified from the level of dynamic characteristic and the dynamic response; finally, the 3D refined calculation model was used to analyze the influence of the skew degree and friction effect to the longitudinal seismic pounding responses of SSGB. The results indicate that the position that produce the maximum impact force between deck and abutment changes with the change of the skew degree; not only the skew degree, but also the friction coefficient can influence the maximum impact force; the friction between deck and abutment weakens the influence of the skew degree to the largest longitudinal displacement in acute position of deck’s ends, reducing the peak rotation angle of deck significantly, making the maximum value of the peak rotation angle appear in the bigger skew degree; the largest longitudinal displacement in deck’s ends will be overestimated without considering the friction effect.
 

关键词

简支梁 / 斜交桥 / 碰撞反应 / 摩擦 / 斜度

Key words

simply-supported girder / skewed bridge / pounding response / friction / skew degree

引用本文

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王军文1,2,吴天宇1,2,李少华1,2,李建中3. 斜交简支梁桥纵向地震碰撞反应精细化研究[J]. 振动与冲击, 2016, 35(8): 194-200
WANG Jun-wen1,2, WU Tian-yu1,2, LI Shao-hua1,2,LI Jian-zhong3. Refined Study on Longitudinal Seismic Pounding Responses of Simply-Supported Skewed Girder Bridge[J]. Journal of Vibration and Shock, 2016, 35(8): 194-200

参考文献

[1] Ghobarah A A. Seismic analysis of skewed highway bridges with intermediate supports [J]. Earthquake Engineering and Structural Dynamics, 1974, 2(3): 235-240.
[2] 叶爱君. 桥梁抗震[M]. 北京: 人民交通出版社, 2011.
YE Ai-jun. Seismic design of bridges[M]. Beijing: China Communications Press, 2011.
[3] 庄卫林, 刘振宇, 蒋劲松. 汶川大地震公路桥梁震害分析及对策[J]. 岩石力学与工程学报, 2009, 28(7): 1377-1387.
ZHUANG Wei-lin, LIU Zhenyu, JIANG Jingsong. Earthquake- induced damage analysis of highway bridges in Wenchuan earthquake and countermeasures [J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(7):1377-1387.
[4] Maragakis E A, Jennings P C. Analytical models for the rigid body motions of skew bridges [J]. Earthquake Engineering and Structural Dynamics, 1987, 15(8): 923-944.
[5] Wakefield R R, Nazmy A S, Billington D P. Analysis of seismic failure in skew RC bridge [J]. Journal of structural engineering, New York, 1991, 117(3): 972-986.
[6] MENG J Y, LUI E M. Seismic analysis and assessment of a skew highway bridge [J]. Engineering Structures, 2000, 22(11): 1433-1452.
[7] Abdel-Mohti A, Pekcan G. Assessment of seismic performance of skew reinforced concrete box girder bridges [J]. International Journal of Advanced Structural Engineering, 2013, 5(1): 1-18.
[8] 卓秋林. 公路简支斜梁桥地震反应分析[D]. 福州: 福州大学, 2004.
ZHUO Qiulin. Seismic response analysis of simple-supported skew highway girder bridges[D]. Fuzhou: Fuzhou University, 2004.
[9] 何健, 叶爱君. 连续斜交梁桥地震下碰撞效应分析[J]. 中南大学学报: 自然科学版, 2012, 43(4): 1475-1481.
HE Jian, YE Ai-jun. Seismic response of continuous skew bridges with pounding effects [J]. Journal of Central South University: Science and Technology, 2012, 43(4):1475-1481.
[10] 卢明奇, 杨庆山, 李英勇. 地震作用下斜交连续梁桥碰撞效应分析[J]. 中国矿业大学学报, 2012, 41(2):289-292.
LU Ming-qi, YANG Qing-shan, LI Ying-yong. Collision effect analysis of skew continuous bridge under seismic response [J]. Journal of China University of Mining & Technology, 2012, 41(2):289-292.
[11] 王军文, 沈贤, 李建中. 地震作用下斜交简支梁桥旋转机理及斜度影响研究[J]. 桥梁建设, 2014, 44(3):32-37.
WANG Jun-wen, SHEN Xian, LI Jian-zhong. Study of rotation mechanism and skew degree influence of skewed simply-supported beam bridge under earthquake excitation [J]. Bridge Construction, 2014, 44(3):32-37.
[12] Yashinsky M., Oviedo R., Ashford S., Fargier-Gabaldon L., and Hube M. Performance of highway and railway structures during the February 27, 2010 Maule Chile earthquake [R]. EERI/PEER/FHWA Bridge Team Rep., 〈http://peer.berkeley. edu/events/pdf/2010/bppr4.pdf〉(Apr. 23, 2011)
[13] Susendar M. A contact element approach with hysteresis damping for the analysis and design of pounding in bridges [D]. Atlanta Botanical: Atlanta Georgia institute of Technology, 2003.
[14] Konstantinidis D, Makris N. Seismic response analysis of multidrum classical columns [J]. Earthquake Engineering and Structural Dynamics, 2005, 34 (10):1243–1270.
[15] 肖建庄, 赵卫平. 高温后高强混凝土与轧制钢板黏结剪切强度和摩擦系数[J]. 建筑材料学报, 2012, 15(5): 697-702.
XIAO Jian-zhuang, ZHAO Wei-ping. Shear bond strength and friction coefficient between high-strength concrete and rolled steel plate after elevated temperatures exposure [J]. Journal of building materials, 2012, 15(5):697-702.

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