移动荷载作用下周期性高架铁路的桩-土-结构耦合动力学模型

沙萱; 范增; 陆建飞

doi:10.11779/CJGE2015S2032

移动荷载作用下周期性高架铁路的桩-土-结构耦合动力学模型 English Version

江苏大学土木工程与力学学院,江苏镇江 212013

基金项目: 国家自然科学基金项目（11272137）

详细信息

作者简介:
沙萱(1984- ),女,回族,江苏南京人,硕士研究生,从事岩土工程研究。

计量
- 文章访问数: 0225
- HTML全文浏览量: 0
- PDF下载量: 0301
出版历程
- 收稿日期: 2015-03-25
- 发布日期: 2015-07-24

Coupled dynamic model for pile-soil-periodic-viaduct under moving loading

Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, China

摘要

摘要: 在移动载荷作用下,周期性高架铁路的上部结构、桩基础及地基会产生耦合振动。为了考虑上述耦合作用,建立了桩土边界元模型来确定桩基础的柔度。根据墩和梁的振动方程推导了墩和梁的传递矩阵;根据梁-梁-墩接头处的联结条件,建立了接头处的传递矩阵。为提高精度,采用铁木辛柯梁理论来描述墩和梁的弯曲振动。通过Fourier变换和序列Fourier变换,把周期性高架铁路对单个移动载荷频域内的动力响应表示为响应函数沿代表跨的积分。利用上述墩和梁及接头处的传递矩阵和桩基础的柔度,得出了耦合情形下高架铁路的响应函数。本文的数值结果表明,刚性支撑和桩基础支撑的周期性高架铁路在单个移动载荷作用下的动力响应有明显差别。
- 周期性高架铁路 /
- 移动载荷 /
- 桩-土-结构耦合 /
- 边界元方法 /
- 铁木辛柯梁理论
Abstract: When a periodic viaduct is subjected to moving loadings, the vibrations of the superstructure, pile foundation and soil will be coupled. To investigate the dynamic response of the periodic viaduct considering the pile-soil-structure interaction, a boundary element model for the pile-soil system is established to determine the compliances of the pile foundation. By using the governing equations for piers and beams, the corresponding transfer matrices are derived. According to the joint conditions at the beam-beam-pier (BBP) junction, the transfer matrix at the junction is obtained. To improve the proposed model, the Timoshenko beam theory is used to describe the ?exural vibrations of the piers and beams. By means of the Fourier and the sequence Fourier transforms, the frequency domain response of the periodic viaduct under a single loading is reduced to an integral of the frequency-wavenumber domain response function over the representative span of the viaduct. Employing the transfer matrices of the piers, beams and BBP junctions as well as the compliances of the pile foundation, the response function for the coupled vibration of the viaduct is obtained. The numerical results show that there are obvious differences between the dynamic responses of the rigidly-supported and pile-supported viaducts.
- periodic viaduct /
- moving loading /
- pile-soil-structure coupling /
- boundary element method /
- Timoshenko beam theory

HTML全文

参考文献(11)

[1]	边学成. 高速列车荷载作用下高架桥和地基振动分析[J].振动工程学报, 2006, 19(4): 438-445. (BIAN Xue-cheng. Analysis of viaduct-ground vibrations due to high-speed train moving loads[J]. Journal of Vibration Engineering, 2006, 19(4): 438-445.(in Chinese))
[2]	TAKEMIYA H, BIAN X C. Shinkansen high-speed train induced ground vibrations in view of viaduct-ground interaction[J]. Soil Dynamics and Earthquake Engineering, 2007, 27: 506-520.
[3]	李忠献, 黄健, 张国忱. 考虑土-结构相互作用的车桥系统耦合振动分析[J]. 天津大学学报, 2005, 38(12): 1035-1041. (LI Zhong-xian, HUANG Jian, ZHANG Guo-chen. Coupled vibration analysis of train-bridge systems considering soil-structure interaction[J]. Journal of Tianjin University, 2005, 38(12):1035-1041. (in Chinese))
[4]	DEVESA J. Influence of soil stiffness on the dynamic behavior of bridges travelled by high-speed trains[J]. Structural Engineering International, 2009, 19: 383-394.
[5]	OPPENHEIM A V, WILLSKY A S, NAWAB S H. Signals and systems[M]. New Jersey: Prentice Hall Englewood Cliffs, 1983.
[6]	GRAFF K F. Wave motion in elastic solids[M]. Oxford: Clarendon Press, 1975.
[7]	MANOLIS G D, BESKOS D E. Boundary element methods in elastodynamics[M]. London: Unwin Hyman, 1988 .
[8]	ZHANG X, LU J F. A wavenumber domain boundary element method model for the simulation of vibration isolation by periodic pile rows[J]. Engineering Analysis with Boundary Elements, 2013, 37: 1059-1073.
[9]	CARCIONE J M. Wave fields in real media-wave propagation in anisotropic, anelastic and porous media[M]. Oxford: Elsevier, 2007.
[10]	LU J F, YUAN H Y. The sequence Fourier transform method for the analysis of a periodic viaduct subjected to non-uniform seismic waves[J]. Acta Mechanica, 2013, 224: 2143-2168.
[11]	LU J F, ZHONG L, ZHANG R. Dynamic response of a periodic viaduct to a moving point loading[J]. Archive of Applied Mechanics, 2015, 85: 149-169.

施引文献

资源附件(0)

计量

文章访问数:
HTML全文浏览量: 0
PDF下载量:
被引次数: 0

移动荷载作用下周期性高架铁路的桩-土-结构耦合动力学模型 English Version

作者简介: 沙 萱(1984- ),女,回族,江苏南京人,硕士研究生,从事岩土工程研究。

计量

出版历程

Coupled dynamic model for pile-soil-periodic-viaduct under moving loading

计量

出版历程

目录

作者简介:
沙萱(1984- ),女,回族,江苏南京人,硕士研究生,从事岩土工程研究。