地铁列车荷载作用下轨道系统及饱和土体动力响应分析

doi:10.13722/j.cnki.jrme.2014.1209

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摘要为研究地铁列车运行引起的轨道系统及饱和土体动力响应问题，建立了地铁列车–轨道结构–衬砌–饱和土体耦合分析模型，其中列车荷载用一系列符合列车几何尺寸的移动常荷载或移动简谐荷载模拟，轨道结构中的钢轨和浮置板简化为无限长弹性Euler梁。基于弹性理论和Biot多孔介质理论，采用2.5维有限元法分别模拟衬砌和饱和土体，结合轨道与衬砌仰拱处的力和位移连续条件，实现浮置板轨道系统与衬砌及周围饱和土体的耦合，并通过快速Fourier逆变换(IFFT)进行波数展开获得三维时域–空间域内的动力响应。研究结果表明，随着常荷载移动速度和移动简谐荷载自振频率的提高，地表振动水平显著增大；移动常荷载产生的地表响应最大值在荷载正上方，其空间衰减率保持恒定；移动简谐荷载产生的地基振动大于移动常荷载产生的地基振动，响应最大值在列车运行线路两侧一定范围内；在移动简谐荷载作用下，钢轨速度谱与地表速度谱分布在以简谐荷载自振频率为中心的一段范围内。

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关键词 ：饱和土, 2.5维有限元, 地铁振动, 浮置板轨道

Abstract：The underground railway coupling analysis model was established and used to study the dynamic response of track systems and saturated soil. The model was divided into four parts，the moving train，floating-slab tracks，liner and saturated ground. The train load was simulated by a series of moving constant or harmonic load in accordance with the geometry of a real train. The tracks consisted of an upper Euler-Bernoulli beam to account for the rails and a lower Euler-Bernoulli beam to account for the slab. By adopting the method of 2.5D FEM，the elastic theory and the Biot’s theory were used to simulate the liner and saturated porous medium respectively. The floating-slab tracks and soil medium were coupled by the boundary conditions at the tunnel invert. The three-dimensional time-space domain dynamic response was obtained from the fast inverse Fourier transform (IFFT). Computed results show that with increasing train velocity and self-vibration frequency of the moving harmonic load，the dynamic responses of the ground surface increase obviously. The maximum ground surface responses generated by the moving constant load are located directly over the tunnel centerline with a constant space attenuation rate. The dynamic responses of ground surface induced by moving harmonic load are larger than those induced by moving constant load and become the strongest at certain distances from the tunnel centerline. The distribution of velocity spectrum for the rail and ground surface is centered on self-vibration frequency of the harmonic load.

Key words： saturated soil 2.5D FEM underground railway vibration floating-slab tracks

引用本文:

袁宗浩1，2，蔡袁强1，2，3，曾晨1，2. 地铁列车荷载作用下轨道系统及饱和土体动力响应分析[J]. 岩石力学与工程学报, 2015, 34(07): 19-19.
YUAN Zonghao1，2，CAI Yuanqiang1，2，3，ZENG Chen1，2. DYNAMIC RESPONSE ANALYSIS OF TRACK SYSTEM AND UNDERGROUND RAILWAY TUNNEL IN SATURATED SOIL SUBJECTED TO A MOVING TRAIN LOAD. , 2015, 34(07): 19-19.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.1209 或 http://www.rockmech.org/CN/Y2015/V34/I07/19

[2]	FORREST J A，HUNT H E M. A three dimensional tunnel model for calculation of train-induced ground vibration[J]. Journal of Sound and Vibration，2006，294(4-5)：678-705. " target="_blank">
[4]	SHENG X，JONES C J C，THOMPSON D J. Prediction of ground vibration from trains using the wavenumber finite and boundary element methods[J]. Journal of Sound and Vibration，2006，293：575-586. " target="_blank">
[6]	DEGRANDE G，CLOUTEAU D，OTHMAN R，et al. A numerical model for ground-borne vibrations from underground railway traffic based on a periodic finite element- boundary element formulation[J]. Journal of Sound and Vibration，2006，293(3/5)：645-666. " target="_blank">
[8]	HUNG H H，YANG Y B. Analysis of ground vibrations due to underground trains by 2.5D finite infinite element approach[J]. Earthquake Engineering and Engineering Vibration，2010，9(3)：327-335. " target="_blank">
[10]	Biot M A. Theory of propagation of elastic waves in a fluid-saturated porous solid. Part I：low-frequency range[J]. Journal of the Acoustical Society of America，1956，28(2)：168-178. " target="_blank">
[12]	黄晓吉，扶名福，徐斌. 移动环形荷载作用下饱和土中圆形衬砌隧洞动力响应研究[J]. 岩土力学，2012，33(3)：892-898.(HUANG Xiaoji，FU Mingfu，XU Bin. Dynamic response of a circular lining tunnel in saturated soil due to moving ring load[J]. Rock and Soil Mechanics，2012，33(3)：892-898.(in Chinese))
[14]	高广运，何俊峰，李佳. 地铁运行引起的饱和土地基动力响应[J]. 浙江大学学报(工学版)，2010，44(10)：1 925-1 930.(GAO Guangyun，HE Junfeng，LI Jia. Dynamic response induced by running subway in saturated ground. Journal of Zhejiang University (Engineering Science，2010，44(10)：1 925-1 930.(in Chinese)) " target="_blank">
[16]	HUSSIEN M F M，H E M HUNT. Modelling of floating-slab tracks with continous slabs under oscillating moving loads[J]. Journal of Sound and Vibration，2006，297(1/2)：37-54. " target="_blank">
[19]	SHI L，SUN H L，CAI Y Q，et al. Validity of fully drained，fully undrained and u-p formulations for modeling a poroelastic half-space under a moving harmonic point load[J]. Soil Dynamics and Earthquake Engineering，2012，42：292-301. " target="_blank">
[1]	METRIKINE A V，VROUWENVELDER A C W M. Surface ground vibration due to a moving rain in a tunnel：two-dimensional model[J]. Journal of Sound and Vibration，2000，234(1)：43-66. " target="_blank">
[3]	BALENDRA T，CHUA K H，LO K W，et al. Steady-state vibration of subway-soil-building system[J]. Journal of Engineering Mechanics，1989，115(1)：145-162. " target="_blank">
[5]	刘维宁，夏禾，郭文军. 地铁列车振动的环境响应[J]. 岩石力学与工程学报，1996，15(增刊)：586-593.(LIU Weining，XIA He，GUO Wenjun. Study of vibration effects of underground trains on surrounding environments[J]. Chinese Journal of Rock Mechanics and Engineering，1996，15(S)：586-593.(in Chinese)) " target="_blank">
[7]	HUNG H H，CHEN G H，YANG Y B. Effect of railway roughness on soil vibrations due to moving trains by 2.5 D finite/infinite element approach[J]. Engineering Structures，2013，57：254-266. " target="_blank">
[9]	BIAN X C，JIN W F，JIANG H G. Ground-borne vibrations due to dynamic loadings from moving trains in subway tunnels[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics and Engineering)，2012，13(11)：870-876. " target="_blank">
[11]	LU J F，JENG D S. Dynamic response of a circular tunnel embedded in a saturated poroelastic medium due to a moving load[J]. Journal of Vibration and Acoustics，2006，128(6)：750-756. " target="_blank">
[13]	刘干斌，谢康和，施祖元. 黏弹性饱和多孔介质中圆柱孔洞的频域响应[J]. 力学学报，2004，36(5)：557-563.(LIU Ganbin，XIE Kanghe，SHI Zuyuan. Frequency response of a cylindrical cavity in poro-viscoelastic saturated medium[J]. Acta Mechanica Sinica，2004，36(5)：557-563.(in Chinese))
[15]	高广运，何俊峰，杨成斌，等. 2.5维有限元分析饱和土地基列车运行引起的地面振动[J]. 岩土工程学报，2011，33(2)：234-241. (GAO Guangyun，HE Junfeng，YANG Chengbin，et al. Ground vibration induced by trains moving on saturated ground using 2.5 D FEM[J]. Chinese Journal of Geothechnical Engineering，2011，33(2)：234-241.(in Chinese))
[17]	HUSSIEN M F M，H E M HUNT. A numerical model for calculating vibration due to a harmonic moving load on a floating-slab track with discontinuous slabs in an underground railway tunnel[J]. Journal of Sound and Vibration，2009，321(1-2)：363-374. " target="_blank">
[18]	LU J F，JENG D S. A half-space saturated poro-elastic medium subjected to a moving point load[J]. Internationl Journal of Solids and Stuctures，2007，44(2)：573-586. " target="_blank">
[20]	蔡袁强，王玉，曹志刚. 移动荷载作用下饱和土地基上板式轨道动力响应[J]. 振动工程学报，2011，24(1)：48-54.(CAI Yuanqiang，WANG Yun，CAO Zhigang. Dynamic response of slab track and saturated soil subjected to a moving train load[J]. Journal of Vibration Engineering，2011，24(1)：48-54.(in Chinese)) " target="_blank">