高低承台桩基地震行为差异研究

doi:10.13722/j.cnki.jrme.2014.0785

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (808 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要对于采用桩基的各类结构，按承台埋没于地基土体与否，可区分之高、低承台桩基型式。在许多实际工程中，因回填土或欠固结土地基的继续沉降，或因土体流变或场地震陷等后沉降效应，均可致使承台与土体接触解除，即先前按设计采用的低承台桩基可能转为高承台型式。在静力条件下，这将导致桩身产生负摩阻力而降低其部分竖向承载能力；然而，在地震作用下，通过开展离心机地震模型试验和ABAQUS计算分析发现：当承台与地基土体脱离时，桩基最大弯矩设计值将会增大，且弯矩有效深度也将变深；更且，基础(承台)周期明显延长，充分表明高、低承台桩基型式地震行为差异迥然，高承台桩基型式较之相应低承台情况更为不利，在抗震设计时应充分予以认识、考虑。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

Abstract：For structures constructed onto pile foundations，according to embedded condition of raft，pile foundation could be distinguished into high and low raft pattern. In many practical engineering，Due to post stage settlement of unconsolidated clay or backfilled soil after construction，or other cases such as soil rheology and seismic field subsidence，all of these may lead to a separation of raft from clay surface，i.e. from original design state which raft was embedded into clay to a new state of high raft pile foundation. For static condition，this kind of separation may disadvantageously result in negative skin friction force along piles，and in turn to reduce vertical bearing capacity of piles. However，during seismic shaking condition，this study，by conducting centrifuge shaking table experiments and ABAQUS simulation on both cases，indicates that pile will undergo a higher maximum bending moment and a much larger active depth under high raft case than those of low raft case. This suggests that embedding condition plays an important role in seismic response of pile-raft foundation，it will become more disadvantageous when raft embedding condition changes from low raft case to high raft case，and should be taken into enough account on practical engineering design.

Key words： earthquake pile foundation high and low raft centrifuge shaking table tests ABAQUS simulation

引用本文:

马亢1，2，许强2，李庶林1，陈东霞1，方军1，窦翰杰1. 高低承台桩基地震行为差异研究[J]. 岩石力学与工程学报, 2015, 34(06): 20-20.
MA Kang1 2，XU Qiang 2，LI Shulin1，CHEN Dongxia1，FANG Jun1，DOU Hanjie1. STUDY ON DIFFERENCE OF SEISMIC BEHAVIOR BETWEEN HIGH AND LOW RAFT PATTERN OF PILE FOUNDATION. , 2015, 34(06): 20-20.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.0785 或 http://www.rockmech.org/CN/Y2015/V34/I06/20

[1]	贺斌. 地震作用下海洋环境码头桩-土动力相互作用分析[博士学位论文][D]. 武汉：武汉大学，2004.(He Bin，Study on the Dynamic Interaction between Pile and soil for the sea wharf in earthquake[Ph. D. Thesis][D].Wuhan：Wuhan University，2004.(in Chinese)) " target="_blank">
[5]	曾庆有，周健，屈俊童. 考虑应力应变时间效应的桩基长期沉降计算方法[J]. 岩土力学，2005，26(8)：1 283-1 287.(ZENG Qingyou，ZHOU Jian，QU Juntong. Method for long-term settlement computation of pile foundation in consideration of time effect of stress-strain relationship[J]. Rock and Soil Mechanics，2005，26(8)：1 283-1 287.(in Chinese)) " target="_blank">
[6]	贺武斌. 静荷载下单桩沉降的时间效应研究[博士学位论文][D]. 杭州：浙江大学，2003.(HE Wubin. Study on the Time Effect of the Settlement of Single Pile under Static Load[D]. Hangzhou：Zhejiang University，2003.(in Chinese)) " target="_blank">
[8]	刘汉龙，雍君，丁选明，等. 现浇X 型混凝土桩的荷载传递机制初探[J]. 防灾减灾工程学报，2009，29(3)：267-271.(LIU Hanlong，YONG Jun，DING Xuanming，et al. study on Load Transfer Mechanism of Cast-in-Place X-Shaped Piles[J]. Journal of Disaster Prevention and Mitigation Engineering，2009，29(3)：267-271.(in Chinese)) " target="_blank">
[9]	YANG Min，SUN Qing，LI Weichao，et al. Three-dimensional finite element analysis on effects of tunnel construction on nearby pile foundation. Journal of Central South University of Technology，2011，18：909-916. " target="_blank">
[11]	JGJ94——2008 建筑桩基技术规范[S]. 北京：中国建筑工业出版社，2008. " target="_blank">
[12]	史佩栋. 桩基工程手册(桩和桩基础手册)[M]. 北京人民交通出版社，2008.(SHI Peidong. Handbook for pile foundation engineering[M]. Beijing：China Communications Press，2008.(in Chinese)) " target="_blank">
[13]	张雁，刘金波. 桩基手册[M]. 北京：中国建筑工业出版社，2009.(ZHANG Yan，LIU Jinbo. Handbook for pile foundation[M]. Beijing：China Architecture and Building Industry Press，2009.(in Chinese)) " target="_blank">
[19]	NIKOLAOU S，MYLONAKIS G，GAZETAS G，et al. Kinematic pile bending during earthquakes：analysis and field measurements[J]. Geotechnique，2001，51(5)：425-440. " target="_blank">
[2]	孔德森. 桩-土相互作用计算模型及其在桩基结构抗震分析中的应用[博士学位论文][D]. 大连：大连理工大学，2004.(KONG De sen. Study on Dynamic Computational Model of Pile-soil Interaction and its Application in Seismic Response Analysis of Pile-Supported Structures[Ph. D. Thesis][D]. Dalian：Dalian University of Technology，2004.(in Chinese)) " target="_blank">
[3]	戚玉亮. 地基土-群桩-悬索大桥体系抗震动力相互作用数值模拟与理论研究[博士学位论文][D]. 上海：同济大学，2010.(QI Yu liang. Numerical simulation and theoretical study on the seismic interaction of Soil-pile group-suspension bridge system[Ph. D. Thesis][D]. Shanghai：Tongji University，2010.(in Chinese)) " target="_blank">
[4]	王东栋. 改进的广义剪切位移法在桥梁桩基沉降计算中的应用与研究[博士学位论文][D]. 上海：同济大学，2011.(WANG Dongdong. Application and Research of Improved Generalized Shear Displacement Method in Bridge Pile Foudation Settlement Calculation[Ph. D. Thesis][D]. Shanghai：Tongji University，a dissertation for PH. D.，2011.(in Chinese)) " target="_blank">
[7]	王新泉，陈永辉，安永福，等. 塑料套管现浇混凝土桩倾斜对承载性能影响的模型试验研究[J]. 岩石力学与工程学报，2011，(4)：834-842(WANG Xinquan，CHEN Yonghui，AN Yongfu，et al. Model test study of effect of inclination on bearing behaviors of plastic tube cast-in-place concrete pile[J]. Chinese Journal of Rock Mechanics and Engineering，2011，(04)：834-842.(in Chinese)) " target="_blank">
[10]	盛春陵，王守超，李仁民. 大直径嵌岩后注浆钻孔灌注桩试桩分析[J]. 岩土工程学报，2012，(增1)：567-573.(SHENG Chunling，WANG Shouchao，LI Renmin. Pile test analysis of large-diameter rock grouting bored piles[J]. Chinese Journal of Geotechnical Engineering，2012，(Supp.1)：567-573.(in Chinese)) " target="_blank">
[14]	马亢，裴建良. 桩筏基础-土动力相互作用的离心模型试验研究[J]. 岩石力学与工程学报，2011，30(07)：1 488-1 495.(MA Kang，PEI Jianliang. A study on the dynamic interaction between pile-raft foundation and soft clay during earthquakes by centrifuge tests[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(07)：1 488-1 495.(In Chinese) ) " target="_blank">
[15]	马亢，许强. 桩-筏-土体系的地震软化效应及ABAQUS计算分析研究[J]. 岩石力学与工程学报，2012，31(增1)：1 126-1 132. (MA Kang，XU Qiang. A study on the seismic softening behavior and ABAQUS simulation of pile-raft-clay system[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(S1)：1 126-1 132.(in Chinese)) " target="_blank">
[16]	TABESH A. Lateral seismic analysis of piles[Ph. D. Thesis][D]. University of Sydney，Australia.，1997. " target="_blank">
[17]	POULOS H G，DAVIS E H. Pile foundation analysis and design[M]. [S.l.]：John Wiley and Sons，1980：455-481. " target="_blank">
[18]	NIKOLAOU S，MYLONAKIS G，GAZETAS G. Kinematic bending moments in seismically stressed piles[R]. National Center for Earthquake Engineering Research. Buffalo：State University of New York，NCEER-95-0022USA，1995：122-157. " target="_blank">
[20]	GAZETAS G. Seismic response of end-bearing single piles[J]. Soil Dynamics and Earthquake Engineering，1984，3(2)：82-93. " target="_blank">
[21]	BANERJEE S，GOH S H，LEE F H. Response of soft clay strata and clay-pile-r systems to seismic shaking[J]. Journal of Earthquake and Tsunami，2007，1(3)：233-255. " target="_blank">