刚性桩复合地基-上部结构动力相互作用体系抗震性能及影响因素分析
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摘要
通过模拟土的非线性动力本构模型,选取合理的人工边界及耦合阻尼模型,建立了刚性桩复合地基与上部结构相互作用体系三维有限元动力分析模型。通过计算,对比了刚性桩复合地基与普通桩基对上部结构地震反应的影响异同,同时得到了土体模量与分层、基础埋深、桩径与桩长、砂石垫层模量与厚度以及上部结构特性等因素在考虑土-结构动力相互作用时对刚性桩复合地基抗震性能的影响及其基本规律,并与已有相关试验结果进行了对比,得到较好验证。研究结果为工程设计与工程应用提供了可借鉴的理论依据。
Through considering nonlinear dynamic soil model, reasonable artificial-boundary and coupling damping model, a 3-D finite element dynamic model of rigid pile composite foundation-superstructure interaction system, is established. Through calculations the different seismic responses of the structure with rigid pile composite foundation and with common pile foundation are compared. At the same time, the influential factors and aseismic capability for rigid pile composite foundation is studied by considering soil modulus and soil layer, embedment depth, pile length and pile diameter, sand-gravel cushion thickness and modulus, structure characteristic, etc. All the results and conclusions will provide theoretical basis for engineering design and practice.
Through considering nonlinear dynamic soil model, reasonable artificial-boundary and coupling damping model, a 3-D finite element dynamic model of rigid pile composite foundation-superstructure interaction system, is established. Through calculations the different seismic responses of the structure with rigid pile composite foundation and with common pile foundation are compared. At the same time, the influential factors and aseismic capability for rigid pile composite foundation is studied by considering soil modulus and soil layer, embedment depth, pile length and pile diameter, sand-gravel cushion thickness and modulus, structure characteristic, etc. All the results and conclusions will provide theoretical basis for engineering design and practice.
引文
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[5]赵明华,刘建华,段少华.考虑基桩差异性及桩土共同工作的桩基承台梁内力分析[J].岩土力学,2006,27(12):2149-2153.ZHAO Ming-hua,LIU Jian-hua,DUAN Shao-hua.Inner force analysis of pile capping beam considering stiffness variance of pile and pile-soil interaction[J].Rock and Soil Mechanics,2006,27(12):2149-2153.
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[9]何益斌,夏栋舟,黄欣荣,等.土-桩-框架结构动力相互作用非线性有限元模拟[J].沈阳建筑大学学报(自然科学版),2008,24(3):428-432.HE Yi-bin,XIA Dong-zhou,HUANG Xin-rong,et al.Nonlinear finite element analysis of soil-pile-frame structure-interaction system[J].Journal of Shenyang Jianzhu University(Natural Science),2008,24(3):428-432.
[10]何益斌,夏栋舟.基于场地土非线性性质的SSDI体系动力特性研究[J].岩土工程学报,2009,31(4):521-527.HE Yi-bin,XIA Dong-zhou.Dynamic behaviors of SSDI system based on nonlinearity of soil in site[J].Chinese Jounal of Geotechnical Engineering,2009,31(4):521-527.
[11]中国建筑科学研究院.GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[12]中国建筑科学研究院.GB50009-2001建筑结构荷载规范[S].北京:中国建筑工业出版社,2001.
[13]谢定义.土动力学[M].西安:西安交通大学出版社,1988.
[14]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,(3):37-43.LIU Hui-shan.A case analysis of earthquake damage of pile foundations[J].Earthquake Resistant Engineering,1999,(3):37-43.
[15]刘惠珊.桩基设计探讨-日本阪神大地震的启示[J].工程抗震,2000,(9):27-32.LIU Hui-shan.A discussion on seismic design of pile foundation[J].Earthquake Resistant Engineering,2000,(9):27-32.
[16]武思宇,宋二祥,刘华北,等.刚性桩复合地基的振动台试验研究[J].岩土工程学报,2005,27(11):1334-1337.WU Si-yu,SONG Er-xiang,LIU Hua-bei,et al.Shaking table test of composite foundation with rigid pile[J].Chinese Jounal of Geotechnical Engineering,2005,27(11):1334-1337.
[2]NOGAMI T,JONES H W,MOSHER R L.Seismic response analysis of pile-supported structure:assessment of commonly used approximations[C]//Proceedings of2nd International Conference:Recent Advancements of Geotechnical Earthquake Engineering and Soil Dynamics.[S.l.]:[s.n.],1991:931-940.
[3]HESHAM M,NAGGAR E I,KEVIN J.Bentley,Dynamic analysis laterally loaded piles and dynamic p-y curves[J].Canadian Geotechnical Journal,2000,37:1166-1183.
[4]池跃君.刚性桩复合地基工作性能及沉降计算方法的研究[博士学位论文D].北京:清华大学,2002.
[5]赵明华,刘建华,段少华.考虑基桩差异性及桩土共同工作的桩基承台梁内力分析[J].岩土力学,2006,27(12):2149-2153.ZHAO Ming-hua,LIU Jian-hua,DUAN Shao-hua.Inner force analysis of pile capping beam considering stiffness variance of pile and pile-soil interaction[J].Rock and Soil Mechanics,2006,27(12):2149-2153.
[6]杨明辉,赵明华,姚琪阳.碎石桩复合地基桩-土应力比计算[J].湖南大学学报(自然科学版),2006,33(5):6-9.YANG Ming-hui,ZHAO Ming-hua,YAO Qi-yang.Calculation for pile-soil stress ratio in crush stone pile composition[J].Journal of Hunan University(Natural Sciences),2006,33(5):6-9.
[7]卢华喜,梁平英,尚守平.地基非线性波动问题中黏-弹性人工边界研究[J].岩土力学,2008,29(7):1911-1916.LU Hua-xi,LIANG Ping-ying,SHANG Shou-ping.Research on viscoelastic artificial boundary for problem of nonlinear wave motion in soil[J].Rock and Soil Mechanics,2008,29(7):1911-1916.
[8]赵明华,邹新军,邹银生,等.倾斜荷载下基桩的改进有限元—有限层分析方法[J].工程力学,2004,21(3):129-133.ZHAO Ming-hua,ZOU Xin-jun,ZOU Yin-sheng,et al.Behavior of piles under inclined loads by the improved finite element-finite layer method[J].Engineering Mechanics,2004,21(3):129-133.
[9]何益斌,夏栋舟,黄欣荣,等.土-桩-框架结构动力相互作用非线性有限元模拟[J].沈阳建筑大学学报(自然科学版),2008,24(3):428-432.HE Yi-bin,XIA Dong-zhou,HUANG Xin-rong,et al.Nonlinear finite element analysis of soil-pile-frame structure-interaction system[J].Journal of Shenyang Jianzhu University(Natural Science),2008,24(3):428-432.
[10]何益斌,夏栋舟.基于场地土非线性性质的SSDI体系动力特性研究[J].岩土工程学报,2009,31(4):521-527.HE Yi-bin,XIA Dong-zhou.Dynamic behaviors of SSDI system based on nonlinearity of soil in site[J].Chinese Jounal of Geotechnical Engineering,2009,31(4):521-527.
[11]中国建筑科学研究院.GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[12]中国建筑科学研究院.GB50009-2001建筑结构荷载规范[S].北京:中国建筑工业出版社,2001.
[13]谢定义.土动力学[M].西安:西安交通大学出版社,1988.
[14]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,(3):37-43.LIU Hui-shan.A case analysis of earthquake damage of pile foundations[J].Earthquake Resistant Engineering,1999,(3):37-43.
[15]刘惠珊.桩基设计探讨-日本阪神大地震的启示[J].工程抗震,2000,(9):27-32.LIU Hui-shan.A discussion on seismic design of pile foundation[J].Earthquake Resistant Engineering,2000,(9):27-32.
[16]武思宇,宋二祥,刘华北,等.刚性桩复合地基的振动台试验研究[J].岩土工程学报,2005,27(11):1334-1337.WU Si-yu,SONG Er-xiang,LIU Hua-bei,et al.Shaking table test of composite foundation with rigid pile[J].Chinese Jounal of Geotechnical Engineering,2005,27(11):1334-1337.
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