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| EXPERIMENTAL RESEARCH ON DYNAMIC RESPONSE OF PILE GROUP OF SUPER HIGHRISE BUILDING ON LIQUEFIABLE GROUND |
| DAI Qiquan1，QIAN Deling1，ZHANG Zehan1，TONG Guofeng1，YANG Yuanwei1，QIAN Liping2 |
(1. College of Civil Engineering，Hefei University of Technology，Hefei，Anhui 230009，China；2. Anhui Institute of
Building Research and Design，Hefei，Anhui 230001，China) |
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Abstract Shaking table test on the interaction between the pile group and super highrise building system on liquefiable foundation was conducted to reproduce the liquefaction-induced large deformation of the system in saturated sandy ground. The excess pore water pressure(EPWP) of ground，the natural frequency，the damping ratio，the strain of pile group，the contact pressure at the bottom of pile and the displacement at pile top was calculated and analyzed before and after large deformation. It was shown that the EPWP response in and out of pile group was different. The sand layer liquefied，the natural frequency of pile group decreased and the damping ratio of pile group increased with the raise of peak acceleration. The dynamic response of piles was relevant to both the peak acceleration and the spectral characteristic of earthquake wave. Besides，the peak strain of pile increased upward along pile body so that there were more cracks on the top of pile. The displacement of pile head varied with the seismic behavior. The primary cause of the large deformation of the system was revealed through the phenomenon which two corner piles were pulled up and pressed down alternately under excitation. Consequently，it is effective to improve the anti-seismic capacity of super highrise building-pile group system by strengthening compressive and tensile resistant property of pile and improving the liquefaction conditions of ground.
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| [1] ASO T，UNO K，KITAGAWN S，et al. A dynamic model test and analysis of a steel pipe piled well foundation[C]// Proceedings of the 11WCEE. [S.l.]：[s.n.]，1996：1 085.
[2] LU X，LI P，CHEN B，et al. Computer simulation of the dynamic layered soil pile structure interaction system[J]. Canadian Geotechnical Journal，2005，42(3)：742–751.
[3] 冯士伦，王建华，郭金童. 液化土层中桩基抗震性能研究[J]. 岩石力学与工程学报，2005，24(8)：1 402–1 406.(FENG Shilun，WANG Jianhua，GUO Jintong. Seismic resistance of pile foundation in liquefaction layer[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(8)：1 402–1 406.(in Chinese))
[4] 孔德森，李纯洁，凌贤长，等. 液化场地群桩–土–结构地震相互作用振动台试验研究[J]. 岩土工程学报，2011，33(增2)：143–149. (KONG Desen，LI Chunjie，LING Xianzhang，et al. Shaking table tests on pile group-soil-structure interaction to seismic loading on liquefied ground[J]. Chinese Journal of Geotechnical Engineering，2011，33(Supp.2)：143–149.(in Chinese))
[5] 钱德玲，李 辉，卢文胜，等. 变截面桩基础体系高层建筑结构的地震响应[J]. 岩土工程学报，2011，33(1)：98–103.(QIAN Deling，LI Hui，LU Wensheng，et al. Seismic response of high-rise structures by different foundation systems[J]. Chinese Journal of Geotechnical Engineering，2011，33(1)：98–103.(in Chinese))
[6] 钱德玲，夏 京，卢文胜，等. 支盘桩–土–高层建筑结构振动台试验的研究[J]. 岩石力学与工程学报，2009，28(10)：2 024–2 030. (QIAN Deling，XIA Jing，LU Wensheng，et al. Study of shaking table test of squeezed branch pile-soil-high-rise structure interaction system[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(10)：2 024–2 030.(in Chinese))
[7] 吕西林，陈跃庆，陈 波，等. 结构–地基动力相互作用体系振动台模型试验研究[J]. 地震工程与工程振动，2000，20(4)：20–29. (LU Xilin，CHEN Yueqing，CHEN Bo，et al. Shakeing table testing of dynamic soil-structure interaction system[J]. Earthquaken Engineering and Engineering Vibration，2000，20(4)：20–29.(in Chinese))
[8] 唐 亮，凌贤长，徐鹏举，等. 可液化场地桥梁群桩–独柱墩结构地震反应振动台试验研究[J]. 土木工程学报，2009，42(11)：102–108.(TANG Liang，LING Xianzhang，XU Pengju，et al. Shaking table tests for seismic response of pile-supported bridge structure with single-column pier in liquefiable ground[J]. China Civil Engineering Journal，2009，42(11)：102–108.(in Chinese))
[9] 汪明武，TOBITA T，IAI S. 倾斜液化场地桩基地震响应离心机试验研究[J]. 岩石力学与工程学报，2009，28(10)：2 012–2 017. (WANG Mingwu，TOBITA T，IAI S. Dynamic centrifuge tests of seismic responses of pile foundations in inclined liquefiable soils[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(10)：2 012–2 017.(in Chinese))
[10] 陈跃庆，吕西林，黄 炜. 结构–地基相互作用振动台试验中士体边界条件的模拟方法[J]. 结构工程师，2000，(3)：25–30.(CHEN Yueqing，LU Xilin，HUANG Wei. Simulation method of soil boundary condition in shaking table tests of soil-structure interaction[J]. Structural Engineers，2000，(3)：25–30.(in Chinese))
[11] 陈跃庆，吕西林，侯建国，等. 有建筑物存在的软土地基液化模拟地震振动台试验研究[J]. 武汉大学学报：工学版，2003，36(1)：59–63.(CHEN Yueqing，LU Xilin，HOU Jianguo，et al.Shaking table test ing on seismic liquefaction of soft soil under building footing[J]. Engineering Journal of Wuhan University：Engineering Science，2003，36(1)：59–63.(in Chinese))
[12] 周 颖，吕西林. 建筑结构振动台模型试验方法与技术[M]. 北京： 科学出版社，2012：16–19.(ZHOU Ying，LU Xilin. Method and technology for shaking table model test of building structures[M]. Beijing：Science Press，2012：16–19.(in Chinese))
[13] 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 foundations[S]. Beijing：China Architecture and Building Press，2008.(in Chinese))
[14] 李培振，程 磊，吕西林，等. 可液化土–高层结构地震相互作用振动台试验[J]. 同济大学学报：自然科学版，2010，38(4)：467–474.(LI Peizhen，CHENG Lei，LU Xilin，et al. Shaking table testing on high-rise buildings considering liquefiable soil-structure interaction[J]. Journal of Tongji University：Natural Science，2010，38(4)：467–474.(in Chinese))
[15] 凌贤长，郭明珠，王东升，等. 液化场地桩基桥梁震害响应大型振动台模型试验研究[J]. 岩土力学，2006，27(1)：7–10.(LING Xianzhang，GUO Mingzhu，WANG Dongsheng，et al. Large scale shaking table model test of seismic response of bridge of pile foundation in ground of liquefaction[J]. Rock and Soil Mechanics，2006，27(1)：7–10.(in Chinese)) |
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2015, Vol. 34 
