Effects of near-fault pulse-type ground motions on long-span cable-stayed bridge

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (21) : 163-172.

ZHANG Fan1,2, LI Shuai1,2, YAN Xiaowei3, WANG Jingquan1,2

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Abstract

The objective of this study is to determine the seismic responses of Sutong cable-stayed bridge taking into account near-fault pulse-type effect and soil-structure interaction effect(SSI). Systematic lumped-parameter models are used to describe the dynamic behavior of the foundation supported on soil. The dynamic finite element model of the bridge considering SSI effect is established. The seismic responses of the towers and deck subjected to three pulse-type ground motions, i.e. Forward-directivity effect pulse (FD), Fling-step effect pulse (FS) and non-pulse records, are investigated. The results revealed that SSI effects mainly affect the bridge responses through a systematic decrease of all modal frequencies and a substantial change in nature of dominant shapes especially for the higher modes of vibrations. When the bridge is subjected to pulse-type near-fault ground motions, SSI effect causes larger displacements of the towers, a significant decrease in the internal forces of the towers, and a certain degree of reduction in both the displacement and base moment of the girder under the longitudinal excitations. However, the response of the girder under horizontal excitations is obviously amplified by SSI effect. The seismic response of the cable-stayed bridge under the pulse-type ground motions is significantly higher than that under non-pulse ground motions. Fling-step ground motions amplify the response of the towers under the longitudinal excitations and the response of the girder under the longitudinal or horizontal excitations. Forward-directivity ground motions amplify the response of the towers under the horizontal excitations. The research results could be used to provide a reference for the seismic design of long-span cable-stayed bridge system located in near-fault zones.

Key words

near-fault ground motion / forward-directivity effect / fling-step effect / systematic lumped-parameter model / soil-structure interaction / long-span cable-stayed bridge

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ZHANG Fan1,2, LI Shuai1,2, YAN Xiaowei3, WANG Jingquan1,2. Effects of near-fault pulse-type ground motions on long-span cable-stayed bridge[J]. Journal of Vibration and Shock, 2017, 36(21): 163-172

References

[1] 谢文，孙利民. 采用新型辅助墩的超大跨斜拉桥顺桥向损伤控制新体系研究[J]. 土木工程学报，2014，47(2):28-34.
XIE Wen, SUN Li-min. Studies on controlling structural systems of super long-span cable-stayed bridge by novel supporting pier in longitudinal direction[J]. China Civil Engineering Journal, 2014, 47(2):28-34.
[2] 刘洪兵，朱晞. 大跨度斜拉桥多支承激励地震响应分析[J]. 土木工程学报，2001，34(6):38-44.
LIU Hong-bing, ZHU Xi. Seismic response analysis of long span cable stayed bridges under multi support excitations[J]. China Civil Engineering Journal, 2001, 34(6):38-44.
[3] 叶爱君，范立础. 超大跨度斜拉桥的横向约束体系[J]. 中国公路学报，2007，20(2):63-67.
YE Ai-jun, FAN Li-chu. Lateral constraint systems for super-long-span cable-stayed bridge[J]. China Journal of Highway and Transport, 2007, 20(2):63-67.
[4] Abdel-Ghaffar A M, Nazmy A. 3-D nonlinear seismic behavior of cable-stayed bridges[J]. Journal of Structural Engineering, 1991, 117(11):3456-3476.
[5] Soneji B B, Jangid R S. Influence of soil–structure interaction on the response of seismically isolated cable-stayed bridge[J]. Soil Dynamics & Earthquake Engineering, 2008, 28(4):245-257.
[6] Atmaca B, Yurdakul M, Sevket A. Nonlinear dynamic analysis of base isolated cable-stayed bridge under earthquake excitations[J]. Soil Dynamics & Earthquake Engineering, 2014, 66:314-318.
[7] Bray J D, Rodriguez-Marek A. Characterization of forward-directivity ground motions in the near-fault region[J]. Soil Dynamics & Earthquake Engineering, 2004, 24(11):815-828.
[8] Somerville P G, Smith N F, Graves R W, et al. Modification of empirical strong ground motion attenuation relations to include the amplitude and duration effects of rupture directivity[J]. Pakistan Journal of Statistics & Operation Research, 1997, 68(1):199-222.
[9] 刘彦辉，谭平，金建敏，等. 地震作用下全浮漂大跨斜拉桥耗能减震控制研究[J]. 振动与冲击，2015，34(8): 1-6.
LIU Yan-hui. TAN Ping, JIN Jian-min. et al. Energy dissipation control for long span cable-stayed bridge adopting floating system under earthquake[J]. Journal of Vibration and Shock, 2015, 34(8): 1-6.
[10] 余友熙，刘中华，余香林，等. 基于非线性随机最优控制的大跨度斜拉桥地震响应Benchmark问题研究[J]. 振动与冲击，2016，35(8): 42-47.
YU You-xi, LIU Zhong-hua, YU Xiang-lin, et al. Benchmark problem investigation for seismic response of large span cable-stayed bridge based on nonlinear stochastic optimal control[J]. Journal of Vibration and Shock, 2016, 35(8): 42-47.
[11] 陈令坤，张楠，胡超，等. 近断层地震方向脉冲效应对高速铁路桥梁弹塑性反应的影响[J]. 振动与冲击，2013，32(15): 149-167.
CHEN Ling-kun, ZHANG Nan, HU Chao, et al. Effects of near-fault directivity pulse-like ground motion on elastic-plastic seismic response of high-speed railway bridge[J]. Journal of Vibration and Shock, 2013, 32(15): 149-167.
[12] Kalkan E, Kunnath S K. Effects of fling step and forward directivity on seismic response of buildings[J]. Earthquake Spectra, 2006, 22(2): 367-390.
[13] 江义，杨迪雄，李刚. 近断层地震动向前方向性效应和滑冲效应对高层钢结构地震反应的影响[J]. 建筑结构学报，2010，31(9): 103-110.
JIANG Yi, YANG Di-xiong, LI Gang. Effects of forward directivity and fling step near-fault ground motions on seismic responses of high-rise steel structure[J]. Journal of Building Structures, 2010, 31(9): 103-110.
[14] Wu G, Zhai C, Li S, et al. Effects of near-fault ground motions and equivalent pulses on Large Crossing Transmission Tower-line System[J]. Engineering Structures, 2014, 77: 161-169.
[15] Yang D, Pan J, Li G. Interstory drift ratio of building structures subjected to near-fault ground motions based on generalized drift spectral analysis[J]. Soil Dynamics and Earthquake Engineering, 2010, 30(11): 1182-1197.
[16] 韩淼，张文会，朱爱东，等. 不同层隔震结构在近断层地震作用下动力响应分析[J]. 振动与冲击，2016，35(5): 120-124.
HAN Miao, ZHANG Wei-hui, ZHU Ai-dong, et al. Dynamic response analysis for multi-story structures with different isolation stories under near-fault ground motions[J]. Journal of Vibration and Shock, 2016, 35(5): 120-124.
[17] 李帅，王景全，颜晓伟，等. 近断层地震动空间分布特征对斜拉桥地震响应影响[J]. 土木工程学报，2016，49(6):1-11.
LI Shuai, WANG Jing-quan, YAN Xiao-wei, et al. Influence of spatial distribution characteristics of near-fault ground motions on seismic response of cable-stayed bridges[J]. China Civil Engineering Journal, 2016, 49(6):1-11.
[18] Shrestha B. Seismic response of long span cable-stayed bridge to near-fault vertical ground motions[J]. KSCE Journal of Civil Engineering, 2015, 19(1): 180-187.
[19] Ismail M, Casas J R, Rodellar J. Near-fault isolation of cable-stayed bridges using RNC isolator[J]. Engineering Structures, 2013, 56(6):327-342.
[20] 丁幼亮，谢辉，耿方方，等. 近断层地震动作用下多塔悬索桥的地震反应分析[J]. 工程力学，2015，32(7): 38-46.
DING You-liang, XIE Hui, GENG Fangfang. Seismic response analysis of a multi-tower suspension bridge subjected to near-fault ground motions[J]. Engineering Mechanics, 2015, 32(7): 38-46.
[21] Cavdar O. Probabilistic sensitivity analysis of two suspension bridges in Istanbul, Turkey to near- and far-fault ground motion[J]. Natural Hazards & Earth System Science, 2012, 12(2):459-473.
[22] Adanur S, Altunişik A C, Bayraktar A, et al. Comparison of near-fault and far-fault ground motion effects on geometrically nonlinear earthquake behavior of suspension bridges[J]. Natural Hazards, 2012, 64(1): 593-614.
[23] 叶爱君，管仲国. 桥梁抗震（第二版）[M]. 北京：人民交通出版社，2011：72-73.
YE Ai-jun, GUAN Zhong-guo. Seismic design of Bridges (Second Edition)[M]. Beijing: China Communications Press, 2011: 72-73.
[24] Wang H, Liu W, Zhou D, et al. Lumped-parameter model of foundations based on complex Chebyshev polynomial fraction[J]. Soil Dynamics & Earthquake Engineering, 2013, 50(7):192-203.