Dynamic response and parameter influence analysis of a floating bridge under earthquake action

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (14) : 149-161.

EARTHQUAKE SCIENCE AND STRUCTURE SEISMIC RESILIENCE

Dynamic response and parameter influence analysis of a floating bridge under earthquake action

WANG Piguang1,2,3，SHEN Yiming1,2,3，QU Yang*1,2,3，ZHAO Mi1,2,3，DU Xiuli1,2,3

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Abstract

In response to the current lack of clarity regarding the seismic response characteristics and the influence of key parameters on floating bridges, a comprehensive finite element numerical model of the main beam, pier columns, pontoons, and anchor cables was established. To address the Fluid-structure interaction problem, the added mass method was employed to simulate the hydrodynamic inertial forces induced by seismic motion, while other hydrodynamic loads acting on the pontoons and anchor cables were modeled using the Morison equation. The dynamic response characteristics of the floating bridge system and the influence of key parameters were analyzed under various seismic motion characteristics, intensities, and directions. The results indicated that significant differences in the floating bridge response were observed depending on the characteristics of the seismic motion. Long-period seismic motions with low frequencies and concentrated energy generated larger responses in the floating bridge, whereas short-period seismic motions with high frequencies and dispersed energy induced relatively smaller responses. It was also found that when the system's dynamic response in the x-direction was analyzed, it excited a dynamic response in the z-direction. In other words, applying seismic motion only in the x-direction resulted in a dynamic response in the z-direction, causing a noticeable difference between the seismic responses in the z-direction and those in the x-y-z directions, with the latter being significantly larger. When the added mass was considered, both the acceleration and displacement responses of the floating bridge were found to be greater than in the case without added mass. Structural damping was observed to have a certain suppressive effect on the floating bridge’s response, while the impact of the drag forces on the pontoons and anchor cables on the system's response was relatively small.

Key words

Floating bridge / Seismic response / Fluid-structure interaction / Parametric study

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WANG Piguang1, 2, 3, SHEN Yiming1, 2, 3, QU Yang1, 2, 3, ZHAO Mi1, 2, 3, DU Xiuli1, 2, 3. Dynamic response and parameter influence analysis of a floating bridge under earthquake action[J]. Journal of Vibration and Shock, 2025, 44(14): 149-161

References

[1] 柏晓东,凡子豪,郭安薪,等.极端波浪作用下深水浮桥结构失效概率主动学习方法[J/OL].中国公路学报,1-16[2024-06-27].
BAI Xiaodong, FAN Zihao, GUO Anxin, et al. Active learning method of structural failure probability of deep-water floating bridge under extreme wave loadings [J/OL]. China Journal of Highway and Transport, 1-16 [2024-06-27].
[2] 刘俊谊,陈徐均,计淞,等.基于Kane方法的不同结构体系通载浮桥水动力响应分析模型[J/OL].工程力学,1-12[2024-06-27].
LIU Junyi, CHEN Xujun, JI Song, et al. A kane-based analysis model to predict hydrodynamic responses of floating bridges with different connections under moving loads [J/OL]. Engineering Mechanics, 1-12 [2024-06-27].
[3] 魏凯,张枫,廖翔,等.张力腿基础刚度对大跨浮式悬索桥风-浪动力响应的影响[J].土木工程学报,2022,55(06):47-61+101.
WEI Kai， ZHANG Feng， LIAO Xiang ， et al. Effect of tension leg foundation stiffness on dynamic responses of a long-span floating suspension bridge under wind and wave loads [J]. Journal of Civil Engineering, 2022, 55(06): 47-61+101.
[4] 罗浩,吕海龙,谢献忠,等.风浪荷载共同作用下大跨度刚构桥动力响应规律研究[J].公路交通科技,2019,36(08):78-85.
LUO Hao, LÜ Hailong, XIE Xianzhong, et al. Study on dynamic response rule of long-span rigid frame bridge subjected to coupled actions of wind and wave loads [J]. Highway Traffic Science and Technology, 2019, 36(08): 78-85.
[5] Wang P, Xu H, Shen Y, et al. Dynamic response analysis of a floating bridge structure under combined actions from seismic loading and waves at different incident angles[J]. Intelligent Transportation Infrastructure, 2024: liae016.
[6] Du S, Wang C, Zhang Z, et al. Experimental Study of Local Scour Around Circular crossing and Square-crossing Piles in Waves and Current[J]. Journal of Marine Environmental Engineering, 2023, 11(1).
[7] Leng S, Xu G, Wu Q, et al. Review on tsunami–bridge interaction[J]. Intelligent Transportation Infrastructure, 2022, 1: liac021.
[8] 周敉,江坤,李久龙.地震作用下不同形式深水桥墩流固耦合效应研究[J].振动与冲击,2022,41(21):7-18.
ZHOU Mi, JIANG Kun, LI Jiulong. Fluid-solid coupling effect of different forms of deep-water piers under earthquake [J]. Vibration and Shock, 2022, 41(21): 7-18.
[9] 雷虎军,林镇荣,温家生,等.波浪-地震联合作用下高速铁路跨海斜拉桥车桥耦合振动研究[J].振动与冲击,2023,42(24):16-23.
LEI Hujun，LIN Zhenrong，WEN Jiasheng, et al. Vehicle⁃bridge coupling vibration of high⁃speed railway sea⁃crossing cable⁃stayed bridge under combined wave⁃earthquake action [J]. Vibration and Shock, 2023, 42(24): 16-23.
[10] 孟思博,丁阳.地震和波浪联合作用下斜拉桥随机动力分析方法[J].振动与冲击,2020,39(17):194-202.
MENG Sibo, DING Yang. Stochastic dynamic analysis method for a cable-stayed bridge under combined actions of earthquake and waves [J]. Vibration and Shock, 2020, 39(17): 194-202.
[11] Xing X, Loken A. Hydroelastic analysis and validation of an end-Anchored floating bridge under wave and current loads[J]. Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, 2019.
[12] Chen X J, Miao Y J, Tang X F, et al. Numerical and experimental analysis of a moored pontoon under regular wave in water of finite depth[J]. Ships and Offshore Structures, 2016, 12(3): 1–12.
[13] Yan J, Liu J, Liu Z, et al. Experimental study on the dynamic responses of the end‐anchored floating bridge subjected to joint actions of earthquakes and water waves[J]. Earthquake Engineering and Structural Dynamics, 2023, 52(10): 2945-2965.
[14] Kwon J-S. Seismic response analysis of a floating bridge with discrete pontoons[J]. Journal of the Earthquake Engineering Society of Korea, 2005, 9(2): 47-58.
[15] Erlend G. Analysis and Modelling of the Bjørnafjorden Floating Bridge subjected to Earthquake and Tsunami loads[D]. Norway: University of Stavanger, 2022.
[16] J.F.威尔逊．海洋结构动力学[M].北京：石油工业出版社，1991.
Wilson J F. Dynamics of marine structures [M]. Beijing: Petroleum Industry Press, 1991.
[17] 董晨霄,陈万如,项贻强,等.地震作用下悬浮隧道锚索-管体耦合振动的模型优化与动力分析[J/OL].工程力学,1-13[2024-07-26].
DONG Chenxiao, CHEN Wanru, XIANG Yiqiang, et al. Model optimization and dynamic analysis of cable-tunnel coupled vibration of submerged floating tunnel under earthquake [J/OL]. Engineering Mechanics, 1-13 [2024-07-26].
[18] 李芬,彭晓宇,黄蔚源,等.动水压力对深水桥梁单桩地震响应的影响研究[J].地震工程与工程振动,2022,42(04):70-79.
LI Fen, PENG Xiaoyu, HUANG Weiyuan, et al. Study on the effects of hydrodynamic pressure on the seismic responses of monopile embedded in deep water [J]. Earthquake Engineering and Engineering Vibration, 2022, 42(04): 70-79.
[19] 赵密,王丽晓,黄义铭,等.矩形柱体地震动水压力的附加质量简化模型[J].防灾减灾工程学报,2020,40(02):174-180.
ZHAO Mi ，WANG Lixiao ，HUANG Yiming , et al. A Simplified Added Mass Model for Dynamic Water Pressure Calculation of Rectangle Cylinder under Earthquake [J]. Journal of Disaster Prevention and Reduction Engineering, 2020, 40(02): 174-180.
[20] 赵密,黄义铭,王丕光.地震作用下矩形柱体动水压力的简化模型[J].北京工业大学学报,2019,45(12):1212-1217.
ZHAO Mi, HUANG Yiming, WANG Piguang. Simplified model for the earthquake induced hydrodynamic pressure on rectangular cylinder [J]. Journal of Beijing University of Technology, 2019, 45(12): 1212-1217.
[21] 李忠献,吴堃,石运东,等.水-振动台相互作用竖向动力试验研究[J].地震工程与工程振动,2019,39(03):1-7.
LI Zhongxian, WU Kun, SHI Yundong, et al. Vertical dynamic tests on the interaction between water and shaking table [J]. Earthquake Engineering and Engineering Vibration, 2019, 39(03): 1-7.
[22] 吴昌聚,沈润杰,何闻,等.振动台在无限流体域中台面附加质量研究[J].工程设计学报(机械•设备和仪器的开发技术),2002,(05):275-278.
WU Changju, SHEN Runjie, HE Wen, et al. Research on additional mass when vibration table vibrates in infinite liquid [J]. Journal of Engineering Design (Mechanical, Equipment, and Instrument Development Technology), 2002, (05): 275-278.
[23] 吴昌聚,沈润杰,何闻,等.水下振动台动态特性的研究[J].机械设计,2003,(03):36-38.
WU Changju, SHEN Runjie, HE Wen, et al. Study on dynamic characteristics of under-water vibration table [J]. Mechanical Design, 2003, (03): 36-38.
[24] 黄信. 地震激励下水—桥墩动力相互作用分析[D]: 天津: 天津大学, 2008.
Huang X. Dynamic Analysis of Water-pier Interaction under Earthquake Excitation [D]: Tianjin: Tianjin University, 2008.
[25] 王丕光,黄义铭,赵密,等.椭圆形柱体地震动水压力的简化分析方法[J].震灾防御技术,2019,14(01):24-34.
WANG Piguang, HUANG Yiming, ZHAO Mi, et al. The simplified method for the earthquake induced hydrodynamic pressure on elliptical cylinder [J]. Earthquake Disaster Prevention Technology, 2019, 14(01): 24-34.
[26] Wang P , Lv S , Zhang C ,et al. An analytical method for the solution of earthquake-induced hydrodynamic forces and wave forces on multiple vertical cylinders with arbitrary smooth sections[J].Ocean engineering, 2022.
[27] 滕斌,宁德志.波浪对直墙前垂直圆柱的绕射[J].海洋工程,2003,(04):48-52.
TENG Bin, NING Dezhi. Wave diffraction from a uniform cylinder in front of a vertical wall [J]. Marine Engineering, 2003, (04): 48-52.
[28] Bao W G, Fujihashi K, Kinoshita T. Interaction of a submerged elliptic plate with waves [J].Journal of Hydrodynamics, 2010, 22(5): 77-82.
[29] 王东辉,潘俊志,遆子龙.基于时域边界元的跨海桥梁下部结构波浪荷载计算方法[J].桥梁建设,2022,52(06):66-72.
WANG Donghui, PAN Junzhi, QI Zilong. Investigation of wave loads on deep-water bridge pier based on time-domain boundary element method[J]. Bridge Construction, 2022, 52(06): 66-72.
[30] Wu B J, Zheng Y H, You Y C, et.al. On diffraction and radiation problem for two cylinders in water of finite depth [J]. Ocean Engineering, 2006, 33(5-6): 679-704.
[31] 滕斌,赵正阳.部分反射直墙前二维物体的绕射和辐射问题[J].海洋工程,2024,42(02):1-11.
Teng B, Zhao Z Y. The diffraction and radiation issues of 2D objects in front of partially reflective vertical walls [J]. Marine Engineering, 2024, 42(02): 1-11.
[32] Martinelli L, Barbella G, Feriani A. A numerical procedure for simulating the multi-support seismic response of submerged floating tunnels anchored by cables[J]. Engineering Structures, 2011, 33(10): 2850-2860.
[33] 马婧,党新志,贺金海,等.考虑动水压力的拉索减震支座深水桥梁地震响应分析[J].南京工业大学学报(自然科学版),2020,42(03):326-332.
Ma J, Dang X Z, He J H, et al. Seismic response analysis of deep-water bridge with cable-sliding friction bearing considering hydrodynamic pressure [J]. Journal of Nanjing University of Technology (Natural Science Edition), 2020, 42(03): 326-332.
[34] Al-Solihat M K H. Dynamics modeling, simulation and analysis of a floating offshore wind turbine[D]. Canada: McGill University, 2017.
[35] Jin C, Kim M, Chung W C. Dynamic Behaviors of a Floating Bridge with Mooring Lines under Wind and Wave Excitations[J]. International Journal of Mechanical and Mechatronics Engineering, 2020, 14(7): 289-294.
[36] Vegvesen S. Bjørnafjorden, Straight Floating Bridge Phase 3 Analysis and Design (Base Case)[R]. Multiconsult, 2017.