Experimental study on the dynamic responses of pile-raft foundation of high-rise building in liquefiable site
LI Yurun1，SHAO Dingsong1，LI He1，WANG Yongzhi2
(1. College of Civil Engineering and Transportation，Hebei University of Technology，Tianjin 300401，China；2. Key Laboratory of Earthquake Engineering and Engineering Vibration，Institute of Engineering Mechanics，China Earthquake Administration，Harbin，Heilongjiang 150080，China)
Abstract：The objective of the current investigation is to delineate the dynamic response mechanism of piled raft foundation supporting high-rise structures in the context of liquefiable sandy soil under the influence of intense seismic activity. Within the scope of this study，a scaled-down model representing the integrated system of saturated sand strata，piled raft foundation，and high-rise edifice has been meticulously designed and fabricated. Utilizing the centrifuge shaking table apparatus，dynamic response assessments under varying degrees of ground motion intensity have been conducted. The study primarily concentrates on the analysis of soil acceleration responses，variations in excess pore water press ratio，dynamic behavior characteristics of high-rise structural systems，and the underlying dynamic response patterns of pile-raft foundations. Furthermore，the investigation delves into the interrelation between soil liquefaction and the dynamic response of the pile-raft foundation system of high-rise buildings. The empirical findings indicate that the piled raft foundation of high-rise buildings exacerbates the depth of soil liquefaction to a certain degree，with the dissipation of pore pressure occurring at a leisurely pace amidst the pile clusters. The amplitude of acceleration response spectra diminishes with the progression of soil depth. During the occurrence of minor seismic events，the acceleration of the raft tends to escalate，whereas，in the case of major seismic events，the acceleration response of the raft exhibits an initial increase followed by a subsequent decrease. As the peak acceleration of seismic waves intensifies，the maximum bending moment experienced by the pile shafts progressively diminishes，with the upper bending moment of the central pile being more pronounced. Moreover，the maximum bending moments of corner piles，side piles，and central piles are observed at the interface between the sandy soil layers. The liquefaction of the foundation soil provides a damping effect for the superstructure to a certain extent.
李雨润1，邵鼎松1，李 赫1，王永志2. 液化场地高层建筑桩筏基础动力响应试验研究[J]. 岩石力学与工程学报, 2025, 44(4): 1013-1025.
LI Yurun1，SHAO Dingsong1，LI He1，WANG Yongzhi2. Experimental study on the dynamic responses of pile-raft foundation of high-rise building in liquefiable site. , 2025, 44(4): 1013-1025.
[1] 唐 亮，满孝峰，丛晟亦，等. 液化场地桩基地震失效机制：现状与挑战[J]. 岩土力学，2023，44(10)：2 979–2 996.(TANG Liang，MAN Xiaofeng，CONG Shengyi，et al. Failure mechanism of pile foundations in liquefiable soils under seismic loading：status and challenge[J]. Rock and Soil Mechanics，2023，44(10)：2 979–2 996.(in Chinese))
[2] RAJIB S，SEKGAR C D，SUMANTA H，et al. Effect of soil-pile raft-structure interaction on elastic and inelastic seismic behaviour[J]. Structures，2020，26：378–395.
[3] 刘惠珊. 桩基震害及原因分析——日本阪神大地震的启示[J]. 工程抗震，1999，22(1)：37–43.(LIU Huishan. Seismic damage of pile foundation and its cause analysis-Inspiration from the Kobe earthquake in Japan[J]. Earthquake Resistant Engineering，1999，22(1)：37–43.(in Chinese))
[4] 陈龙伟，刘昊儒，任叶飞，等. 2023年2月6日土耳其双强震场地液化及其震害特征现场调查分析[J]. 岩土工程学报，2024，46(7)：1 541–1 548.(CHEN Longwei，LIU Haoru，REN Yefei，et al. In-situ investigation of site liquefaction and liquefaction-induced damages triggered by two strong Türkiye earthquakes on Feb. 6th，2023[J]. Chinese Journal of Geotechnical Engineering，2024，46(7)：1 541–1 548.(in Chinese))
[5] WEI W，ERICH B. A simple hypoplastic constitutive model for sand[J]. International Journal for Numerical and Analytical Methods in Geomechanics，1994，18(12)：833–862.
[6] ELGAMAL A，YANG Z H，PARRA E. Computational modeling of cyclic mobility and post-liquefaction site response[J]. Soil Dynamics and Earthquake Engineering，2002，22(4)：259–271.
[7] YANG Z H，ELGAMAL A，PARRA E. Computational model for cyclic mobility and associated shear deformation[J]. Journal of Geotechnical and Geoenvironmental Engineering，2003，129(12)：1 119–1 127.
[8] SUBHAMOY B，MADABHUSHI G S，MALCOLM B. An alternative mechanism of pile failure in liquefiable deposits during earthquakes[J]. Geotechnique，2004，54(3)：203–213.
[9] ROUHOLAMIN M，LOMBARDI D，BHATTACHARYA S. Experimental investigation of transient bending moment of piles during seismic liquefaction.[J]. Soil Dynamics and Earthquake Engineering，2022，157：107251.
[10] HAYASHI K，TAKAHASHI S，SAITO T. Dynamic response of the saturated soil-reinforced concrete pile superstructure interaction under repeated shaking[J]. Soil Dynamics and Earthquake Engineering，2021，145：106685.
[11] LIU X，WANG R，ZHANG J M. Centrifuge shaking table tests on 4×4 pile groups in liquefiable ground[J]. Acta Geotechnica，2018，13： 1 405–1 418.
[12] ZHANG J，LI Y R，RONG X，et al. Dynamic p-y curves for vertical and batter pile groups in liquefied sand[J]. Earth quake Engineering and Engineering Vibration，2022，21(3)：605–616.
[13] 李雨润，刘 毅，梁旭华. 液化场地–群桩–上部结构动力特性研究综述[J]. 河北工业大学学报，2024，53(1)：74–80.(LI Yurun，LIU Yi，LIANG Xuhua. Review on dynamic characteristics of liquefied site pile group-superstructure[J]. Journal of Hebei University of Technology，2024，53(1)：74–80.(in Chinese))
[14] DASH S R，BHATTACHARYA S. Experimental py curves for liquefied soils from centrifuge tests[J]. Earthquake Engineering and Engineering Vibration，2021，20：863–876.
[15] 闫志晓，李雨润，王东升，等. 覆水砂土场地中桥梁群桩基础地震响应离心试验研究[J]. 岩土力学，2023，44(3)：861–872.(YAN Zhixiao，LI Yurun，WANG Dongsheng，et al. Centrifugal experimental study on seismic response of bridge pile group foundation in overlaying water sandy field[J]. Rock and Soil Mechanics，2023，44(3)：861–872.(in Chinese))
[16] 许成顺，豆鹏飞，杜修力，等. 液化场地–群桩基础–结构体系动力响应分析–大型振动台模型试验研究[J]. 岩土工程学报，2019，41(12)：2 173–2 181.(XU Chengshun，DOU Pengfei，DU Xiuli，et al. Liquefaction site-group pile foundation-structural system dynamic response analysis-large-scale shaking table model test research[J]. Chinese Journal of Geotechnical Engineering，2019，41(12)：2 173–2 181.(in Chinese))
[17] 庄海洋，赵 畅，于 旭，等. 液化地基上隔震结构群桩与土动力相互作用振动台模型试验研究[J]. 岩土工程学报，2022，44(6)：979–987.(ZHUANG Haiyang，ZHAO Chang，YU Xu，et al. Earthquake responses of piles-soil dynamic interaction system for base-isolated structure system based on shaking table tests[J]. Chinese Journal of Geotechnical Engineering，2022，44(6)：979–987.(in Chinese))
[18] 戴启权，钱德玲，张泽涵，等. 液化场地超高层建筑群桩基础动力响应试验研究[J]. 岩石力学与工程学报，2015，34(12)：2 572–2 579. (DAI Qiquan，QIAN Deling，ZHANG Zehan. Experimental research on dynamic response of pile group[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(12)：2 572–2 579.(in Chinese))
[19] 汪 刚，景立平，李嘉瑞，等. 桩–土–上部结构动力相互作用振动台试验研究[J]. 岩石力学与工程学报，2021，40(增2)：3 414–3 424. (WANG Gang，JING Liping，LI Jiarui，et al. Shaking table test study on seismic soil pile superstructure interaction[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(Supp.2)：3 414–3 424. (in Chinese))
[20] HUSSEIN A F，El N M H. Seismic axial behaviour of pile groups in non-liquefiable and liquefiable soils[J]. Soil Dynamics and Earthquake Engineering，2021，149：106853.
[21] VISUVASAM J，CHANDRASEKARAN S. Effect of soil-pile-structure interaction on seismic behaviour of RC building frames[J]. Innovative Infrastructure Solutions，2019，4(1)：45.
[22] 王永志，王体强，王 海，等. 我国土工离心机进展与研发关键技术[J]. 地震研究，2020，43(3)：592–600.(WANG Yongzhi，WANG Tiqiang，WANG Hai，et al. China?s geotechnical centrifuge progress and research and development of key technologies[J]. Journal of Seismological Research，2020，43(3)：592–600.(in Chinese))
[23] 王体强，王永志，张雪东，等. 超重力振动台柔性叠层箱剪切效能评价方法[J]. 岩土力学，2022，43(3)：719–728.(WANG Tiqiang，WANG Yongzhi，ZHANG Xuedong，et al，Shear performance evaluation of a flexible laminar container with hypergravity shaking table tests[J]. Rock and Soil Mechanics，2022，43(3)：719–728.(in Chinese))
[24] 中华人民共和国行业标准编写组. JGJ94—2008 建筑桩基技术规范[S]. 北京：中国建筑工业出版社，2008.(The Professional Standards Compilation Group of People?s Republic of China. JGJ94—2008 Technical code for building pile foundation[S]. Beijing：China Architecture and Building Press，2008.(in Chinese))
[25] 中华人民共和国国家标准编写组. GB55002—2021 建筑与市政工程抗震通用规范[S]. 北京：中国建筑工业出版社，2021.(The National Standards Compilation Group of People?s Republic of China. GB55002—2021 General code for seismic design of buildings and municipal engineering[S]. Beijing：China Architecture and Building Press，2021.(in Chinese))
[26] 中华人民共和国国家标准编写组. GB50011—2010(2016年版) 建筑抗震设计规范[S]. 北京：中国建筑工业出版社，2016.(The National Standards Compilation Group of People?s Republic of China. GB 50011—2010(2016). Code for seismic design of buildings[S]. Beijing：China Architecture and Building Press，2016.(in Chinese))
[27] 汤兆光. 超重力试验动态孔压传感器设计方法、性能评价与应用[博士学位论文][D]. 哈尔滨：中国地震局工程力学研究所，2022. (TANG Zhaoguang. Design method and performance evaluation of dynamic miniature pore water pressure transducer in centrifuge modelling and its application[Ph. D. Thesis][D]. Harbin：Institute of Engineering Mechanics China Earthquake Administration，2022.(in Chinese))
[28] 中华人民共和国行业标准编写组. JGJ 125—2016 危险房屋鉴定标准[S]. 北京：中国建筑工业出版社，2016.(The Professional Standards Compilation Group of People?s Republic of China. JGJ 125—2016 Standard for dangerous building appraisal[S]. Beijing：China Architecture and Building Press，2016.(in Chinese))
[29] 孟上九，刘汉龙，袁晓铭，等. 可液化地基上建筑物不均匀震陷机制的振动台试验研究[J]. 岩石力学与工程学报，2005，24(11)：1 978–1 985. (MENG Shangjiu，LIU Hanlong，YUAN Xiaoming，et al. Shaking table experimental study on the mechanism of inhomogeneous subsidence of buildings on liquefiable foundations[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(11)：1 978–1 985.(in Chinese))
[30] 徐 进，陈卓识，孙 锐. 液化土层上建筑物不均匀震陷的数值研究[J]. 地震工程与工程振动，2017，37(4)：158–164.(XU Jin，CHEN Zhuoshi，SUN Rui. Numerical study on earthquake-induced uneven settlement of liquefiable soil layers[J]. Earthquake Engineering and Engineering Dynamics，2017，37(4)：158–164.(in Chinese))
2025, Vol. 44 
