1. School of Civil Engineering, Yantai University, Yantai Shandong 264005, China;
2. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou Gansu 730070, China
Effects of Friction at Movable Supports on Elasto-plastic Seismic Responses of Continuous Girder Bridges
WANG Chang-feng1, CHEN Xing-chong2, DING Ming-bo2
1. School of Civil Engineering, Yantai University, Yantai Shandong 264005, China;
2. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou Gansu 730070, China
摘要The effect of friction at movable supports on the elasto-plastic seismic responses of continuous girder bridges was analyzed on the basis of three aspects including stiffness contribution, friction energy dissipation of the movable supports, and kinetic interaction between the girders and movable piers. Finite element models were established, which considered the friction nonlinearity of the movable supports and the material nonlinearity of the reinforced concrete piers. In addition, nonlinear time history analysis was performed to analyze the effects of friction at the movable supports on the pier bottom curvature, girder displacement, velocity, and acceleration. The results indicated that the frictional effect at movable supports is not always favorable. In some cases, the friction at these points must be considered. For the nonlinear time history analysis, the effect of natural vibration characteristics of the bridge and the response spectrum of the ground should also be considered. For some complicated continuous bridges, particularly those with the heights and stiffness of the fixed and movable piers, the friction at movable supports should be considered in seismic analysis.
Abstract：The effect of friction at movable supports on the elasto-plastic seismic responses of continuous girder bridges was analyzed on the basis of three aspects including stiffness contribution, friction energy dissipation of the movable supports, and kinetic interaction between the girders and movable piers. Finite element models were established, which considered the friction nonlinearity of the movable supports and the material nonlinearity of the reinforced concrete piers. In addition, nonlinear time history analysis was performed to analyze the effects of friction at the movable supports on the pier bottom curvature, girder displacement, velocity, and acceleration. The results indicated that the frictional effect at movable supports is not always favorable. In some cases, the friction at these points must be considered. For the nonlinear time history analysis, the effect of natural vibration characteristics of the bridge and the response spectrum of the ground should also be considered. For some complicated continuous bridges, particularly those with the heights and stiffness of the fixed and movable piers, the friction at movable supports should be considered in seismic analysis.
基金资助:Supported by the National Natural Science Foundation of China (No.51108220)
通讯作者:
WANG Chang-feng, wangchang-f@126.com
E-mail: wangchang-f@126.com
引用本文:
王常峰, 陈兴冲, 丁明波. 活动支座摩擦作用对连续梁桥弹塑性地震反应的影响[J]. Journal of Highway and Transportation Research and Development, 2014, 8(1): 45-51.
WANG Chang-feng, CHEN Xing-chong, DING Ming-bo. Effects of Friction at Movable Supports on Elasto-plastic Seismic Responses of Continuous Girder Bridges. Journal of Highway and Transportation Research and Development, 2014, 8(1): 45-51.
[1] WANG Dong-sheng, FENG Qi-min. Effects of Frictional Force at Movable Supports on Earthquake Response of Simply Supported Reinforced Concrete Bridges[J]. Earthquake Engineering and Engineering Vibration, 1998, 18(4):30-39. (in Chinese)
[2] KIM S H, MHA H S, LEE S W. Effects of Bearing Damage upon Seismic Behaviors of a Multi-span Girder Bridge[J]. Engineering Structures, 2006, 28(7):1071-1080.
[3] LI Jia-wu, LU Bin, LIU Jian-xin. Shake Table Experimental Study of the Seism-reducing Behavior of Continuous-beam Bridges[J]. Journal of Zhengzhou University of Technology, 2002, 23(2):34-36. (in Chinese)
[4] FAN Li-chu, NIE Li-ying, LI Jian-zhong. Dynamic Characteristic Analysis of Laminated Rubber Bearing Sliding under Earthquake[J]. China Journal of Highway and Transport, 2003, 16(4):30-35. (in Chinese)
[5] YANG Liang, XIAO Jie, WANG Wen-xin. Analysis of Seismic Isolation and Ductility for Long-span Continuous Bridges[J]. Journal of Highway and Transportation Research and Development, 2011, 28(8):73-78. (in Chinese)
[6] ZHENG Yue, CHEN Xing-chong, DAI Li-min, et al. Simplified Calculation of Elasto-plastic Performance of RC Column Pier[J]. Journal of Highway and Transportation Research and Development, 2006, 23(4):76-79. (in Chinese)
[7] WANG Chang-feng, CHEN Xing-chong, ZHU Dong-sheng. Analysis on the Influence of the Friction Force at the Movable Supports on the Seismic Performance of a Bridge[J]. World Information On Earthquake Engineering, 2005, 21(4):82-87. (in Chinese)
[8] BHASKARARAO A V, JANGID R S. Seismic Analysis of Structures Connected with Friction Dampers[J]. Engineering Structures, 2006, 28(5):690-703. (in Chinese)
[9] NIE Li-ying, LI Jian-zhong, FAN Li-chu. Effects of Dynamic Vertical Resistance Force of Sliding Bearing of Bridges[J]. Journal of Tongji University, Natural Science Edition, 2002, 30(11):128-132. (in Chinese)
[10] WANG Chang-feng, CHEN Xing-chong. Effect of Vertical Excitation on Seismic Performance of Continuous Bridge[J]. Journal of Vibration and Shock, 2007, 26(6):31-35, 181. (in Chinese)
[11] YE Ai-jun, HU Shi-de, FAN Li-chu. Simulation of Seismic Behavior for Bridge Bearings[J]. Journal of Tongji University,Natural Science Edition, 2001, 29(1):6-9. (in Chinese)
[12] ATES S, BAYRAKTAR A, DUMANOGLU A A. The Effect of Spatially Varying Earthquake Ground Motions on the Stochastic Response of Bridges Isolated with Friction Pendulum Systems[J]. Soil Dynamics and Earthquake Engineering, 2006, 26(1):31-44. (in Chinese)
[1]
常柱刚, 王林凯, 夏飞龙. 基于CV NewMark-b法桥梁风致振动FSI数值模拟[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 28-37.
2014, Vol. 8 
