Shaking table tests and numerical analysis for pounding effect between main span and approach span of long-span suspension bridges
YAN Jukao1,2,LI Jianzhong2,PENG Tianbo2,WANG Junwen3
1.Structural Health Monitoring and Control Key Laboratory of Hebei Province,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;
2.State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;
3.Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education,Shijiazhuang Tiedao University,Shijiazhuang 050043,China
In order to study pounding effect between main span and approach span of long-span multi-tower suspension bridges,a model for 1/40 scale of Taizhou Changjiang Highway Bridge was designed,constructed and tested on a shaking table.No connections were installed between the main beam and the middle tower in the longitudinal direction.Two fixed bearings and four polysaccharide rubber sliding bearings were installed between each approach beam and piers.The initial gap distance is 3 mm at the expansion joint.Pounding responses between the main span and the approach span were tested under three earthquake waves.The shaking table tests indicated that displacements of the approach and internnal forces acting on fixed piers of the approach span decrease due to the pounding effects between the main span and the approach one when the main span and the approach one are close to each other; however,displacements of the approach span and internal forces acting on fixed piers of the approach span increase due to the pounding effects when the approach span is chased by the main span.The numerical analysis results showed that the test results can be simulated better when adopting Kelvin element combined with SAP2000 commercial software and the contact stiffness is taken as 0.2 times of the axial stiffness of the approach span.The selection of contact stiffness provided a reference for similar bridges’pounding effect simulation.
闫聚考1，2 李建中2 彭天波2 王军文3 . 大跨度悬索桥主引桥碰撞效应振动台试验及数值研究[J]. 振动与冲击, 2017, 36(7): 234-240.
YAN Jukao1,2,LI Jianzhong2,PENG Tianbo2,WANG Junwen3. Shaking table tests and numerical analysis for pounding effect between main span and approach span of long-span suspension bridges. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(7): 234-240.
[1] 范立础. 梁桥非线性地震反应分析-老滦河桥的震害分析. 土木工程学报,1981,14(2): 41-51.
Fan Li-chu. Nonlinear earthquake response analysis of beam bridge-seismic damage analysis of the old Luan-river bridge. Journal of vibration and shock, 1981,14(2): 41-51
[2] Jennings P C. Engineering features of the San Fernando earthquake of February 9, 1971. Report, No.EERL-71-02. Earthquake Engineering Research Laboratory, California Institute of Technology, Pasadena, 1971
[3] A staneh A, B ertero V V, Bolt B A, et al. Preliminary report on the seismological and engineering aspects of the October 17, 1989 Santa Cruz( Loma Prieta) earthquake. Report, No. UCB/EERC-89/14, Earthquake Engineering Research Center, University of California, Berkeley, California, 1989.
[4] Earthquake Engineering Research Institute (EERI). Northridge earthquake of January 17, 1994-Reconnaissance Report, Vol.1. Report. No. 95-03, 1995, J. F. Hall. , EERI, Oakland, California.
[5] Earthquake Engineering Research Institute (EERI). The Hyogo-Ken Nanbu Earthquake of January 17, 1995-preliminary reconnaissance report. Report, No. 95-04, Oakland, CA, 1995.
[6] Maison B F, Kasai K. Analysis for a type of structural pounding [J]. Journal of Structural Engineering, 1990, 116(4): 957-977.
[7] Anagnostopoulos S A. Pounding of buildings in series during earthquakes [J]. Earthquake engineering & structural dynamics, 1988, 16(3): 443-456.
[8] Chau K T, Wei X X. Pounding of structures modelled as non-linear impacts of two oscillators [J]. Earthquake engineering & structural dynamics, 2001, 30(5): 633-651.
[9] Hunt K H, Crossley F R E. Coefficient of restitution interpreted as damping in vibroimpact [J]. ASME, Journal of applied Mecahanics, 1975, 42(2): 440-445.
[10] Zhu P, Abe M, Fujino Y. Evaluation of pounding countermeasures and serviceability of elevated bridges during seismic excitation using 3D modeling[J]. Earthquake engineering & structural dynamics, 2004, 33(5): 591-609.
[11] 李建中, 范立础. 非规则梁桥纵向地震反应及碰撞效应[J]. 土木工程学报, 2005, 38(1): 84-90.
Li Jian-zhong, Fan Li-chu. Longitudinal seismic response and pounding effects of girder bridges with unconventional configurations[J]. China civil engineering journal, 2005,01:84-90.
[12] 王东升, 冯启民, 王国新. 基于直杆共轴碰撞理论的桥梁地震反应邻梁碰撞分析模型[J]. 工程力学, 2004, 21(2): 157-166.
Wang Dong-sheng, Feng Qi-min, Wang Guo-xin. Analysis model of pounding between adjacent bridge girders during earthquakes based on collinear impact between rods [J]. Engineering mechanics, 2004, 21(2): 157-166.
[13] 李忠献, 岳福青, 周莉. 地震时桥梁碰撞分析的等效 Kelvin 撞击模型[J]. 工程力学, 2008, 25(4): 128-133.
Li Zhong-xian, Yue Fu-qing, Zhou Li. Equivalent kelvin impact model for pounding analysis of bridges during earthquake [J]. Engineering mechanics, 2008, 25(4): 128-133.
[14] 聂利英, 李建中, 范立础. 地震作用下结构碰撞的模型参数及其影响分析[J]. 工程力学, 2005, 22(5): 142-146.
Nie Li-ying, Li Jian-zhong, Fan Li-chu. Selection of pounding analysis parameters and its effects on structure under earthquake [J]. Engineering mechanics, 2005, 22(5): 142-146.
[15] Van Mier J G M, Pruijssers A F, Reinhardt H W, et al. Load-time response of colliding concrete bodies [J]. Journal of Structural Engineering, 1991, 117(2): 354-374.
[16] Jankowski R. Experimental study on earthquake‐induced pounding between structural elements made of different building materials [J]. Earthquake Engineering & Structural Dynamics, 2010, 39(3): 343-354.
[17] Guo A, Li Z, Li H, et al. Experimental and analytical study on pounding reduction of base‐isolated highway bridges using MR dampers [J]. Earthquake Engineering & Structural Dynamics, 2009, 38(11): 1307-1333.
[18] 李忠献, 张勇, 岳福青. 地震作用下隔震简支梁桥碰撞反应的振动台试验[J]. 地震工程与工程振动, 2007, 27(2): 152-157.
Li Zhong-xian, Zhang Yong, Yue Fu-qing. Shaking table test on pounding responses of simply supported isolated bridges under earthquake excitation [J]. Earthquake Engineering and Engineering Vibration, 2007, 27(2): 152-157.
[19] Hao H, Bi K, Chouw N, et al. State-of-the-art review on seismic induced pounding response of bridge structures [J]. Journal of Earthquake and Tsunami, 2013, 7(03).
[20] Li, J., Yan, J.,and Peng, T，et al. Shake Table Studies of Seismic Structural Systems of a Taizhou Changjiang Highway Bridge Model. J. Bridge Eng., 2015.20(3), 04014065
[21] 闫聚考,李建中,彭天波. 泰州长江公路大桥振动台试验--试验设计及抗震体系试验结果分析.[J].东南大学学报(自然科学版),2014,44(2):357-362.
Yan Ju-kao,Peng Tian-bo andLi Jian-zhong. Shake table test of Taizhou Changjiang Highway Bridge:test design and result analysis of seismic structural system [J]. Journal of Southeast University (Natural Science Edition), 2014, 44(2):357-362. (in Chinese)
[22] 王军文,李建中,范立础. 非规则梁桥伸缩缝处的碰撞对地震反应的影响. 土木工程学报, 2006, 30(1): 54-59
Wang Jun-wen, Li Jian-zhong, Fan Li-chu. Effect of pounding at expansion joists on seismic response of irregular girder bridges [J]. China civil engineering journal,2006,01: 54-59.
[23] Muthukumar S, DesRoches R. A Hertz contact model with non‐linear damping for pounding simulation[J]. Earthquake engineering & structural dynamics, 2006, 35(7): 811-828.
[24] 闫聚考，李建中，彭天波等. 三塔两跨悬索桥行波效应振动台试验及数值研究[J]. 振动与冲击, 2016, 35(7): 44-48+55.
Yan Ju-kao, Li Jian-zhong, Peng Tian-bo. Shake table test and numerical analysis on wave passage effect of three-tower two-span suspension bridge [J]. Journal of vibration and shock, 2016, 35(7): 44-48 and 55.
