全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

地下洞室断面形状随机性对平面SH波散射的影响

DOI: 10.13197/j.eeev.2014.01.1.hey.001, PP. 1-7

Keywords: 地下洞室,断面形状,平面SH波,散射,波函数展开法,半解析解,蒙特卡洛方法

Full-Text   Cite this paper   Add to My Lib

Abstract:

采用波函数展开法及边界离散的方法给出了任意断面形状的地下洞室对平面SH波散射的半解析解,利用蒙特卡罗方法随机模拟产生了30组洞室断面样本,通过对30组地下洞室在平面SH波入射下地表动力响应的统计分析,研究了洞室断面形状随机性对地表响应的影响。研究表明,洞室断面形状随机性对波的散射具有重要影响。当洞室断面半径的变异系数为0.1时,地表位移响应幅值变异系数可达0.97。当入射频率较低时,变异系数比较小;而随着频率的升高,变异系数逐渐增大。当波垂直入射时,变异系数较小;当波水平入射时,变异系数最大;当波斜入射时,变异系数介于二者之间。当洞室埋深较小时,变异系数较大;随着埋深增加,变异系数逐渐减小。

References

[1]  Pao Y H, Mow C C. Diffraction of elastic waves and dynamic stress concentrations[M]. New York: Crane Russak and Company, Inc, 1973.
[2]  Lee V W. On deformations near circular underground cavity subjected to incident plane SH-waves[C]// Proceedings of the Application of Computer Methods in Engineering Conference, Los Angeles, USA, 1977, 951-962.
[3]  Lee V W, Trifunac M D. Response of tunnels to incident SH-waves[J]. Journal of Engineering Mechanics Division, ASCE, 1979, 105: 643-659.
[4]  林 宏, 刘殿魁. 半无限空间中圆形孔洞周围SH波的散射[J]. 地震工程与工程振动, 2002, 22(2): 9-16. LIN Hong, LIU Diankui. Scattering of SH-wave around a cavity in half-space[J]. EARTHQUKE ENGINEERING AND ENGINEERING DYNAMICS, 2002, 22(2): 9-16. (in Chinese)
[5]  Liang J W, Luo H, Lee V W. Diffraction of plane SH waves by a semi-circular cavity in half-space[J]. Earthquake Science, 2010, 23(1):5-12.
[6]  Luo H, Lee V W, Liang J W. Anti-plane (SH) waves diffraction by an underground semi-circular cavity: analytical solution[J]. Earthquake Engineering and Engineering Vibration, 2010, 9(3):385-396.
[7]  Kobayashi S, Nishimura N. Analysis of dynamic soil-structure interactions by boundary integral equation method[M]. Numerical Methods in Engineering, Paris: Pluraris, 1983, 353-362.
[8]  Manolis G D, Beskos D E. Boundary Element Methods in Elastodynamics[M]. London: Unwin Hyman, 1988.
[9]  Luco J E, De Barros F C P. Dynamic displacements and stresses in the vicinity of a cylindrical cavity embedded in a half-space[J]. Earthquake Engineering and Structural Dynamics, 1994, 23: 321-340.
[10]  Shinozuka M, Deodatis G.Simulation of stochastic processes by spectral representation[J]. Applied Mechanics Review, 1991, 44 (4): 191-204.
[11]  林永星. 地下隧洞及夹塞区断面形状对平面SH波散射的影响[D]. 天津:天津大学, 2007. LIN Yongxing.Influcnce of the underground couity and inclusion?s cross-section-shape on scattering and diffraction of plane SH-waves[D].Tianjin:Tianjin University,2007.(in Chinese)
[12]  Moeen-Vaziri N, Trifunac M D. Scattering and diffraction of plane SH-waves by two-dimensional inhomogeneities[J]. Soil Dynamics and Earthquake Engineering, 1988, 7(4): 179-188.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133