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...

陡坎地形对地面运动的影响

, PP. 28-32

Keywords: 陡坎地形,地面运动,放大系数,垂直入射地震波

Full-Text   Cite this paper   Add to My Lib

Abstract:

局部不规则地形对地震地面运动有很大影响。本文针对陡坎地形,采用数值模拟方法,探讨了不同坡角情形下,垂直入射不同SV波时陡坎地形对陡坎上侧(坡顶)和陡坎下侧(坡底)的影响程度和影响范围。结果表明(1)陡坎上侧的放大系数大于水平自由地表,陡坎下侧的放大系数则小于水平自由地表;(2)x方向,随着坡角的增大,陡坎上侧的放大系数也增大,而陡坎下侧的放大系数随之减小;z方向,随着坡角的增大,陡坎上、下侧的放大系数都增大;(3)坡角发生变化时,陡坎下侧的影响范围基本不变,而在陡坎上侧,影响范围随坡角的增大有少许增加;(4)由于陡坎的存在,场地表面z方向出现了振动,放大系数随着坡角的增大而增大,放大系数与输入波有关,但是,x方向的放大系数受输入波的影响很小。

References

[1]  景立平,卓旭炀,王祥建.复杂场地对地震波传播的影响[J]. 地震工程与工程振动,2005,25(6):16-23. JING Liping, ZHUO Xuyang, Wang Xiangjian. Effect of complex site on seismic wave propagation[J].Journal of Earthquake Engineering and Engineering Vibration, 2005, 25(6):16-23.(in Chinese)
[2]  Davis L L, West L R.Observed effects of topography on ground motion[J].Bull Seism Soc Amer,1973,63:283-298.
[3]  Clough R W, Chopra A K. Earthquake stress analysis in earth dams[J].Engrg.Mech.,ASCE,1966,92:197- 210,EM2.
[4]  刘晶波,局部不规则地形对地震地面运动的影响[J]. 地震学报, 1996,18(2):239-245 LIU Jingbo. Effects of local irregular topography on seismic ground motion[J].Acta Seismologica Sinica, 1996, 18(2):239-245.(in Chinese)
[5]  车 伟,罗奇峰.复杂地形条件下地震波的传播研究[J].岩土工程学报,2008,30(9):1333-1337. CHE Wei, LUO Qifeng. Seismic wave propagation in complex topography[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(9):1333-1337. (in Chinese)
[6]  周传荣.一些特殊地形对SH波传播的影响[J].地震学报,1983,5(1):55-64. ZHOU Chuanrong. Some special topography: their influences on the propagation of SH-waves[J].Acta Seismologica Sinica,1983,5(1):55-64.(in Chinese)
[7]  祁生文.单面边坡的两种动力反应形式及其临界高度[J].地球物理学报,2006,49(2):518-523. QI Shengwen. Two patterns of dynamic responses of single-free-surface slopes and their threshold height[J].Chinese Journal of Geophysic,2006,49(2):518-523.(in Chinese)
[8]  柴红保,曹 平,林 杭.竖直向上传播剪切波作用下边坡动力响应规律[J].中南大学学报:自然科学版,2011,4(4):1079-1084. CHAI Hongbao, CAO Ping, LIN Hang. Dynamic response laws of slope under vertical shear wave[J]. Journal of Central South University:Science and Technology,2011, 42(4):1079-1084. (in Chinese)
[9]  王 伟.地震动的山体地形效应.哈尔滨:中国地震工程力学研究所,2011. WANG Wei. Effects of hill topography on ground motion. Harbin: Institute of Engineering Mechanics, China Earthquake Administration, 2011. (in Chinese)
[10]  Ashford S A,Sitar N.Analysis of topographic amplification of inclined shear waves in a steep coastal bluff[J]. Bull Seis Soc Am, 1997, 87: 692-700.
[11]  Ashford S A,Sitar N,Lysmer J,et al.Topographic effects on the seismic response of steep[J]. Bull Seis Soc Am, 1997, 87: 701?709.
[12]  廖振鹏,工程波动理论导论[M].北京:科学出版社,2002. LIAO Zhenpeng. Introduction to wave motion theories for engineering, second edition[M]. Beijing: Science Press, 2002:190-213. (in Chinese)
[13]  孔 戈,丁海平,金 星,等,多次透射边界在ANSYS软件中应用[J]. 工程抗震与加固改造,2005,27(2),67-70. KONG Ge, DING Haiping, JIN Xing, et al. The application of multi-transmitting boundary in ANSYS[J]. Earthquake Resistant Engineering and Retrofitting, 2005,27(2): 67-70. (in Chinese)

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133