Dynamic response analysis of helical piles in marine soft soil areas based on P-wave oblique incidence

ZONG Zhongling1, CEN Hang1, HUANG Delong1, LIU Qiang2, TANG Aiping2, ZHUANG Xiaoxuan1

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (15) : 294-301.

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (15) : 294-301.

Dynamic response analysis of helical piles in marine soft soil areas based on P-wave oblique incidence

  • ZONG Zhongling1, CEN Hang1, HUANG Delong1, LIU Qiang2, TANG Aiping2, ZHUANG Xiaoxuan1
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Abstract

In earthquake-prone areas, more and more buildings use helical piles as foundations, and this pile type has good seismic capacity. By establishing a three-dimensional finite element model based on a viscoelastic artificial boundary, the seismic action is equated to the force on the boundary nodes. In this study, the effect of dynamic and static boundary transformations is considered, and finally a three-dimensional model of helical pile-soil with viscoelastic boundary is established. The effects of different types of seismic waves, seismic intensity, incident angle and number of helical blades on the axial force, bending moment and dynamic p-y curves of helical piles are investigated for a marine-phase soft soil site. The results show that the effect of incident angle on axial force and dynamic p-y curve is larger compared to bending moment. In addition to this, the seismic intensity has a greater effect on the bending moment, while the seismic wave frequency and the number of helical blades have a smaller effect on it. When loading different PGA (0.05g, 0.1g, 0.3g), as the incident angle changes, the difference between the maximum and minimum bending moments of the spiral pile increases from 144.1 N•m to 891 N•m. The conclusions of this study can not only derive the interaction relationship between the helical pile-soil under the soft soil site, but also provide a basis for the seismic design of helical piles.

Key words

helical pile / oblique incidence of P wave / viscos-spring boundary / equivalent seismic nodal force / dynamic p-y curves

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ZONG Zhongling1, CEN Hang1, HUANG Delong1, LIU Qiang2, TANG Aiping2, ZHUANG Xiaoxuan1. Dynamic response analysis of helical piles in marine soft soil areas based on P-wave oblique incidence[J]. Journal of Vibration and Shock, 2024, 43(15): 294-301

References

[1] PERKO H A. Helical piles: a practical guide to design and installation[M]. John Wiley & Sons, 2009. [2] CERATO A B, Vargas T M, Allred S M. A critical review: State of knowledge in seismic behaviour of helical piles[J]. DFI Journal-The Journal of the Deep Foundations Institute, 2017, 11(1): 39-87. [3] ELSAWY M K, EL NAGGAR M H, Cerato A, et al. Seismic performance of helical piles in dry sand from large-scale shaking table tests[J]. Géotechnique, 2019, 69(12): 1071-1085. [4] ORANG M J, MOTAMED R, TOTH J. Experimental evaluation of dynamic response of helical piles in dry sand using 1g shaking table tests[C]//7th International Conference on Earthquake Geotechnical Engineering. 2019. [5] SHAHBAZI M, CERATO A B, ALLRED S, et al. Damping characteristics of full-scale grouped helical piles in dense sands subjected to small and large shaking events[J]. Canadian Geotechnical Journal, 2020, 57(6): 801-814. [6] FAYEZ A F, EL NAGGAR M H, CERATO A B, et al. Seismic response of helical pile groups from shake table experiments[J]. Soil Dynamics and Earthquake Engineering, 2022, 152: 107008. [7] FAYEZ A F, EL NAGGAR M H, CERATO A B, et al. Assessment of SSI effects on stiffness of single and grouped helical piles in dry sand from large shake table tests[J]. Bulletin of Earthquake Engineering, 2022, 20(7): 3077-3116. [8] 赵密,王鑫,钟紫蓝等. P波斜入射下非基岩场地中核岛结构地震响应规律研究[J].工程力学,2020,37(12):43-51+77. ZHAO M, WANG X, ZHONG Z L, et al. Study on seismic responses of nuclear island structure in non-bedrock site under obliquely incidence of P waves[J]. Engineering Mechanics, 2020, 37(12): 43-51+77. [9] 夏樟华,唐永波,林友勤等. 斜入射地震下预制拼装管廊地震响应分析[J].地震工程与工程振动,2022,42(03):180-189. XIA Z H, TANG Y B, LIN Y Q et al. Response analysis for prefabricated composite utility tunnels under oblique incident earthquakes[J]. Earthquake Engineering and Engineering Dynamics, 2022, 42(03): 180-189. [10] 张懂懂, 刘洋, 熊峰等. P波与SV波斜入射下岩体隧道洞口段地震响应分析[J].振动与冲击,2022,41(24):278-286. ZHANG D D, LIU Y, XIONG F, et al. Seismic response analysis of rock tunnel near⁃portal under oblique incidence of P wave and SV wave[J]. Journal of Vibration and Shock, 2022, 41(24): 278-286. [11] ÁLAMO G M, PADRÓN L A, AZNÁREZ J J, et al. Structure-soil-structure interaction effects on the dynamic response of piled structures under obliquely incident seismic shear waves[J]. Soil Dynamics and Earthquake Engineering, 2015, 78: 142-153. [12] WANG D, SHI P, ZHAO C. Two-dimensional in-plane seismic response of long-span bridges under oblique P-wave incidence[J]. Bulletin of Earthquake Engineering, 2019, 17: 5073-5099. [13] MEDINA C, ÁLAMO G M, AZNAREZ J J, et al. Variations in the dynamic response of structures founded on piles induced by obliquely incident SV waves[J]. Earthquake Engineering and Structural Dynamics, 2019, 48(7): 772-791. [14] HE R, KAYNIA A M, ZHANG J. Lateral free-field responses and kinematic interaction of monopiles to obliquely incident seismic waves in offshore engineering[J]. Computers and Geotechnics, 2021, 132: 103956. [15] 丁海平,朱重洋,于彦彦.P,SV波斜入射下凹陷地形地震动分布特征[J].振动与冲击,2017,36(12):88-92+98. DING H P, ZHU C Y, YU Y Y. Characteristic of ground motions of a canyon topography under inclined P and SV waves[J]. Journal of Vibration and Shock, 2017,36(12):88-92+98. [16] 王飞,宋志强,刘云贺等.SV波斜入射不同自由场构建方法下水电站地面厂房地震响应研究[J].振动与冲击,2021,40(07):9-18. WANG F, SONG Z Q, LIU Y H, et al. Seismic response of ground powerhouse of hydropower station based on different free field construction methods with oblique incidence of SV wave[J]. Journal of Vibration and Shock, 2021, 40(07): 9-18. [17] 王飞,宋志强,刘云贺等.基于设计地震动的斜入射波时程确定方法对土石坝地震响应的影响[J].振动与冲击,2021,40(19):80-88. WANG F, SONG Z Q, LIU H Y, et al. Effects of oblique incident wave time history determination method based on design ground motion on seismic response of earth-rock dam[J]. Journal of Vibration and Shock, 2021,40(19):80-88. [18] 刘琳,宋志强,王飞等.近断层SV波斜入射下沥青混凝土心墙坝响应分析[J].振动与冲击,2021,40(21):97-105. LIU L, SONG Z Q, WANG F, et al. Response analysis of asphalt concrete core dam under oblique incidence of near⁃fault SV wave[J]. Journal of Vibration and Shock, 2021, 40(21): 97-105. [19] 宋志强,刘琳,王飞等.近断层P波斜入射下沥青混凝土心墙坝响应分析[J]. 振动与冲击, 2023, 42(07): 245-253. SONG Z Q, LIU L, WANG F et al. Response analysis of asphalt concrete core dam under oblique incidence of near-fault P-wave[J]. Journal of Vibration and Shock, 2023, 42(07): 245-253. [20] HO H M, MALIK A A, KUWANO J, et al. Influence of helix bending deflection on the load transfer mechanism of screw piles in sand: Experimental and numerical investigations[J]. Soils and Foundations, 2021, 61(3): 874-885. [21] 万星. 连云港深厚软土层中预制方桩沉桩挤土效应研究[D].东南大学,2019. WAN X. Study on soil compaction effect of prefabricated square piles in deep soft soil layer in Lianyungang[D]. Southeast University, 2019. [22] 唐亮. 液化场地桩—土动力相互作用p-y曲线模型研究[D].哈尔滨工业大学,2011. TANG L. p-y model of dynamic pile-soil interaction in liquefying ground[D]. Harbin Institute of Technology, 2011. [23] FAYYAZI M S, TAIEBAT M, FINN W D L. Group reduction factors for analysis of laterally loaded pile groups[J]. Canadian geotechnical journal, 2014, 51(7): 758-769. [24] HAZZAR L, HUSSIEN M N, KARRAY M. On the behaviour of pile groups under combined lateral and vertical loading[J]. Ocean Engineering, 2017, 131: 174-185. [25] LIN Y, LIN C. Scour effects on lateral behavior of pile groups in sands[J]. Ocean Engineering, 2020, 208: 107420. [26] JIANG W, LIN C. Scour effects on vertical effective stresses and lateral responses of pile groups in sands[J]. Ocean Engineering, 2021, 229: 109017. [27] JONES K, SUN M, LIN C. Numerical analysis of group effects of a large pile group under lateral loading[J]. Computers and Geotechnics, 2022, 144: 104660. [28] 黄德龙. 埋地弯管地震反应特性及基于监测的供水管网连通性[D].哈尔滨工业大学,2023. HUANG D L. Seismic response characteristics of buried bends and connectivity of water supply pipeline network based on monitoring[D]. Harbin Institute of Technology, 2023. [29] 杜修力,赵密,王进廷.近场波动模拟的人工应力边界条件[J].力学学报,2006(01):49-56. Du XL, Zhao M, Wang JT. Artificial stress boundary conditions for near-field wave simulation[J]. Chinese Journal of Theoretical and Applied Mechanics, 2006; 38(1): 49-56. [30] 刘晶波,吕彦东.结构-地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998(03):55-64. Liu JB, Lv Y. A direct method for analysis of structure-foundation dynamic interaction problems[J]. China Civil Engineering Journal 1998; 31(03): 55-64. [31] HUANG Z Y, FENG Y, TANG A P, et al. Influence of oblique incidence of P-waves on seismic response of prefabricated utility tunnels considering joints[J]. Soil Dynamics and Earthquake Engineering, 2023, 167: 107797. [32] 梁建文,梁佳利,张季,等.深厚软土场地中三维凹陷地形非线性地震响应分析[J].岩土工程学报,2017,39(07):1196-1205. LIANG JW, LIANG JL, ZHANG J et al. Nonlinear seismic response of 3D canyon in deep soft soils[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(07): 1196-1205. [33] 韩冰,梁建文,朱俊.深厚饱和软土场地中透镜体对上部结构地震响应的影响[J].岩土力学,2018,39(06):2227-2236+2248. HAN B, LIANG JW, ZHU J. Effect of lenticle on seismic response of structures in deep water-saturated poroelastic soft site[J]. Rock and Soil Mechanics, 2018, 39(06): 2227-2236+2248. [34] 宗钟凌,庄潇轩,黄蕴晗,等.软黏土中成桩工艺对HSCM桩抗压承载性能影响的模型试验研究[J].海洋工程,2023,41(03):168-176. ZONG ZL, ZHUANG XX, HUANG YH, et al. Experiment on the compressive bearing performance of helix stiffened cement mixing piles embedded in soft clay influenced by the installed technique[J]. The Ocean Engineering, 2023, 41(03): 168-176.
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