考虑波动效应的SH简谐地震波作用下单桩水平振动研究

闫启方; 刘林超

考虑波动效应的SH简谐地震波作用下单桩水平振动研究 English Version

信阳师范学院土木工程学院，河南信阳 464000

基金项目: 国家自然科学基金项目（10872124）；河南省科技发展计划项目（112300410105）；河南省教育厅自然科学研究计划项目（2011A1301001）；信阳师范学院青年骨干教师资助计划（2012007）

详细信息

作者简介:
闫启方(1979– )，女，河南驻马店人，硕士，讲师，主要从事桩基动力学等方面的研究与教学工作。

中图分类号: TU476
计量
- 文章访问数: 1060
- HTML全文浏览量: 0
- PDF下载量: 430
出版历程
- 收稿日期: 2011-10-07
- 发布日期: 2012-08-19

Lateral vibration of a single pile under SH harmonic seismic wavesconsidering three-dimensional wave effect

(School of Civil Engineering, Xinyang Normal University, Xinyang 464000, China)

摘要

摘要: 借助于土体的一维波动模型求解了SH简谐地震波作用下土层的水平振动，从三维轴对模型出发考虑桩周土的水平波动效应，通过引入势函数并运用分离变量法在考虑桩–土相互作用的情况下求解了SH简谐地震波作用下由于桩土相互作用引起的土层的径向位移、水平位移以及土体对桩基的水平作用力，并在此基础上建立了SH简谐地震波作用下桩基的水平振动方程，借助于三角函数的正交性和桩–土接触面处的连续条件求得了桩基的水平位移。借助于放大因子的概念研究了SH简谐地震波对桩顶水平位移的影响。研究表明：SH简谐地震波作用下桩基的动力响应存在有共振现象；放大因子随频率的变化曲线存在3个峰值，前两个峰值相对较大；当桩土模量比较大时桩土模量比对放大因子几乎没有影响。
- 水平振动 /
- 分离变量法 /
- 波动效应 /
- 放大因子 /
- 地震波
Abstract: The lateral vibration of the soil under SH harmonic seismic waves is solved by one-dimensional model of wave motion. On the basis of three-dimensional soil model and taking consideration of wave effect of soil, the radial displacement and horizontal displacement caused by pile-soil interaction and the lateral soil force on the pile are obtained by means of the potential functions and variable separation method, and the lateral dynamic equation of the pile is established by considering the orthogonality of trigonometric function and the continuous conditions at the soil-pile contact surfaces. The influence of the SH harmonic seismic waves on the horizontal displacement of the pile head is investigated by the concept of magnification factor. The results indicate that the dynamic response of the pile under SH harmonic seismic waves has resonance. There are three peaks of the curves of amplification factor versus frequency, and the first two peaks are relatively larger. The pile-soil modulus ration has little effect on the amplification factor when the pile-soil modulus ration is larger.
- lateral vibration /
- variable separation method /
- wave effect /
- amplification factor /
- seismic wave

HTML全文

参考文献(11)

[1]	MATSUI T, ODA K. Foundation damage of structures[J]. Soils and Foundations, 1996(S1): 189–200.
[2]	TOKIMATSU K, MIZUNO H, KAKURAI M. Building damage associated with geotechnical problems[J]. Soils and Foundations, 1996(S1): 219–234.
[3]	FINN W D L, GOHL W B. Response of model pile groups to strong shaking[C]// Proceedings of the Conference on Piles Under Dynamic Loads. New York, 1992: 27–55.
[4]	KAYNIA A M, NOVAK M. Response of pile foundations to Rayleigh waves and obliquely body wave[J]. Earthquake Engineering and Structural Dynamics, 1992, 21: 303–318.
[5]	MAKRIS N. Soil-pile interaction during the passage of Rayleigh waves. An analytical solution[J]. Earthquake Engineering and Structural Dynamics, 1994, 23(2): 153–167.
[6]	王立忠, 冯永正, 柯瀚, 等. 瑞利波作用下成层地基中单桩的横向振动分析[J]. 振动工程学报, 2001, 14(2): 205–209. (WANG Li-zhong, FENG Yong-zheng, KE Han, et al. Lateral dynamic response of single pile in multiple layers soil during the passage of Rayleigh waves [J]. Journal of Vibration Engineering, 2001, 14(2): 205–209. (in Chinese))
[7]	王海东, 尚守平. 瑞利波作用下径向非均质地基中的单桩竖向响应研究[J]. 振动工程学报, 2006, 19(2): 258–264. (WANG Hai-dong, SHANG Shou-ping. Research on vertical dynamic response of single-pile in radically inhomogeneous soil during the passage of Rayleigh waves[J]. Journal of Vibration Engineering, 2006, 19(2): 258–264. (in Chinese))
[8]	王海东, 尚守平. 瑞利波作用下考虑桩土相互作用的单桩竖向动力响应计算研究[J]. 工程力学, 2006, 23(8): 74–78. (WANG Hai-dong, SHANG Shou-ping. Computational research on vertical dynamic response of single-pile considering pile-soil interaction during passage of Rayleigh waves[J]. Engineering Mechanics, 2006, 23(8): 74–78. (in Chinese))
[9]	刘林超, 闫启方, 杨骁. SH简谐波作用下桩土横向动力相互作用解析分析[J]. 公路交通科技, 2010, 27(10): 25–28. (LIU Lin-chao, YAN Qi-fang, YANG Xiao. Analysis on pile-soil lateral dynamic interaction under SH harmonic wave excitation[J]. Journal of Highway and Transportation Research and Development, 2010, 27(10): 25–28. (in Chinese))
[10]	刘林超, 杨骁. 基于基于严格平面应变模型的土中群桩水平振动研究[J]. 工程力学, 2010, 42(7): 168–174. (LIU Lin-chao, YANG Xiao. Lateral vibration of pile groups in soil based on plane strain model[J]. Engineering Mechanics, 2010, 42(7): 168–174. (in Chinese))
[11]	余俊, 尚守平, 李忠, 等. 饱和土中端承桩水平振动动力响应分析[J]. 岩土工程学报, 2009, 31(3): 408–415. (YU Jun, SHANG Shou-ping, LI Zhong, et al. Dynamical characteristics of an end bearing pile embedded in saturated soil under horizontal vibration[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(3): 408–415. (in Chinese))

施引文献

资源附件(0)

计量

文章访问数: 1060
HTML全文浏览量: 0
PDF下载量: 430
被引次数: 0

考虑波动效应的SH简谐地震波作用下单桩水平振动研究 English Version

作者简介: 闫启方(1979– )，女，河南驻马店人，硕士，讲师，主要从事桩基动力学等方面的研究与教学工作。

计量

出版历程

Lateral vibration of a single pile under SH harmonic seismic wavesconsidering three-dimensional wave effect

计量

出版历程

目录

作者简介:
闫启方(1979– )，女，河南驻马店人，硕士，讲师，主要从事桩基动力学等方面的研究与教学工作。