近断层速度脉冲地震动对边坡滑移的影响分析

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (0 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要采用基于小波变换的多向地震动速度脉冲特性鉴定方法，从NGA(next generation attenuation)数据库及汶川地震动记录中选取196条速度脉冲地震动；基于Newmark非耦合滑动模型，考虑土体动力非线性，通过对比近断层脉冲及非脉冲地震动引起的不同参数边坡的滑移特征，分析近断层地震动速度脉冲特性及边坡本身参数对滑动位移值的影响；同时对近断层速度脉冲地震动参数与边坡滑移量的相关性做了对比分析。结果表明：(1) 近断层速度脉冲地震动引起的边坡滑动位移值远大于近断层非脉冲地震动，对长周期边坡影响尤为明显；(2) 相比非脉冲地震动，脉冲地震动引起的边坡滑动时间较短，且主要发生在地震动起始阶段的较短时间内(速度脉冲段)，滑移的坡体具有更大的滑移速度，携带更高的能量，从而对周边环境产生更强的破坏作用；(3) 近断层速度脉冲地震动引起的边坡滑移特征与其速度脉冲特性(持时短、周期长、速度峰值大)密切相关，且峰值地震动速度PGV与边坡滑移量具有高度相关性。最后，通过比较原始速度脉冲地震动及相应的等效脉冲作用下不同参数边坡的滑动位移值，对提取出的等效脉冲预测原始地震动引起的滑动位移的有效性进行分析，并基于此建立脉冲参数–滑动位移曲面。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：边坡工程, 近断层地震动, 速度脉冲, 滑动位移, 边坡, 小波分析

Abstract：Based on the procedure to identify velocity pulse for multi-component ground motions，196 ground motions from NGA(next generation attenuation) database and Wenchuan earthquake are classified as pulse-like ground motions. Newmark decoupled method considering the nonlinear soil property is used to compare the sliding displacements of slopes caused by near-fault pulse-like and non-pulse-like ground motions. Effects of pulse characteristics and slope parameters on sliding displacement are analyzed；and the efficiency of different pulse-like ground motion parameters for predicting the displacement is also investigated. The analyses indicate that the near-fault pulse-like ground motions result in much larger displacement than non-pulse-like ground motions，especially significant effect on long-period slopes. Also，displacements induced by pulse-like ground motion commonly have shorter duration and larger sliding velocity compared with non-pulse-like ground motion. It is shown that sliding displacement characteristics caused by pulse-like ground motion are closely related to its velocity-pulse feature，and peak ground velocity is the most efficient parameter for predicting sliding displacement. The effectiveness of the equivalent wavelet pulse on representing the original pulse-like ground motions in terms of sliding displacement value is investigated. Finally，sliding displacements of slope to pulse-like ground motions is summarized in terms of a response surface.

Key words： slope engineering near-fault ground motions velocity pulse sliding displacement slope wavelet analysis

收稿日期: 2013-03-31

引用本文:

宋健1，2，高广运1，2. 近断层速度脉冲地震动对边坡滑移的影响分析[J]. 岩石力学与工程学报, 2014, 33(2): 317-326.
SONG Jian1，2，GAO Guangyun1，2. SLIDING DISPLACEMENTS OF SLOPES UNDER NEAR-FAULT PULSE-LIKE GROUND MOTIONS. , 2014, 33(2): 317-326.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/I2/317

[2]	江义，杨迪雄，李刚. 近断层地震动向前方向性效应和滑冲效应对高层钢结构地震反应的影响[J]. 建筑结构学报，2010，31(9)：103-110.(JIANG Yi，YANG Dixiong，LI Gang. Effects of forward directivity and fling step of near-fault ground motions on seismic responses of high-rise steel structure[J]. Journal of Building Structures，2010，31(9)：103-110.(in Chinese))
[4]	BRAY J D，RODRIGUEZ-MAREK A. Characterization of forward-directivity ground motions in the near-fault region[J]. Soil Dynamics and Earthquake Engineering，2004，24(5)：815-828. " target="_blank">
[5]	AGRAWAL A K，and HE W L. A closed-form approximation of near-fault ground motion pulses for flexible structures[C]// Proceedings of the 15th ASCE Engineering Mechanics Conference. New York：Columbia University，2002. " target="_blank">
[1]	KALKAN E，KUNNATH S K. Effects of fling step and forward directivity on seismic response of building[J]. Earthquake Spectra，2006，22(2)：367-390. " target="_blank">
[3]	SOMERVILLE P G. Development of an improved representation of near-fault ground motions[C]// SMIP 98：Seminar on Utilization of Strong Motion Data. Oakland，CA：[s. n.]，1988：1-20. " target="_blank">
[6]	MAVROEIDIS G P，PAPAGEORGIOU A S. A mathematical representation of near-fault ground motions[J]. Bulletin of the Seismological Society of America，2003，93(3)：1 099-1 131. " target="_blank">
[7]	BAKER J W. Quantitative classification of near-fault ground motions using wavelet analysis[J]. Bulletin of the Seismological Society of America，2007，97(5)：1 486-1 501. " target="_blank">
[8]	谢俊举，温增平，李小军，等. 基于小波方法分析汶川地震近断层地震动的速度脉冲特性[J]. 地球物理学报，2012，55(6)：1 963- 1 972.(XIE Junju，WEN Zengping，LI Xiaojun，et al. Analysis of velocity pulses for near-fault strong motions from the Wenchuan earthquake based on wavelet method[J]. Chinese Journal of Geophysics，2012，55(6)：1 963-1 972.(in Chinese))
[9]	GORUM T，FAN X，WESTEN C J，et al. Distribution pattern of earthquake-induced landslides triggered by the 12 May 2008 Wenchuan earthquake[J]. Geomorphology，2011，133(3/4)：152-167. " target="_blank">
[10]	MALLAT S G. A wavelet tour of signal processing[M]. San Diego：Academic Press，1999. " target="_blank">
[14]	MAKDISI F I，SEED H B. Simplified procedure for estimation dam and embankment earthquake induced deformations[J]. Journal of the Geotechnical Engineering Division，ASCE，1978，104(GT7)：849-868. " target="_blank">
[15]	RATHJE E M，BRAY J D. An examination of simplified earthquake induced displacement procedures for earth structures[J]. Canadian Geotechnical Journal，1999，36(1)：72-87. " target="_blank">
[16]	RATHJE E M，BRAY J D. Nonlinear coupled seismic analysis of earth structure[J]. Journal of Geotechnical and Geoenvironmental Engineering，2000，126(11)：1 002-1 215. " target="_blank">
[17]	李红军，迟世春，林皋. 基于黏着滑动耦合动力分析的Newmark 滑块位移法[J]. 岩石力学与工程学报，2007，26(9)：1 787-1 793. (LI Hong-jun，CHI Shi-chun，LIN Gao. An improved Newmark sliding block method based on stick-slip coupled dynamic response[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(9)：1 787-1 793.(in Chinese)) " target="_blank">
[18]	KOTTKE A R，RATHJE E M. Technical Manual for Strata[R]. Berkeley，California：University of California，2008. " target="_blank">
[20]	胡进军，谢礼立. 地震破裂的方向性效应相关概念综述[J]. 地震工程与工程振动，2011，31(4)：1-8.(HU Jinjun，XIE Lili. Review of rupture directivity related concepts in seismology[J]. Journal of Earthquake Engineering and Engineering Vibration，2011，31(4)：1-8.(in Chinese)) " target="_blank">
[11]	HOWARD J K，TRACY C A，BURNS R G. Comparing observed and predicted directivity in near-source ground motion[J]. Earthquake Spectra，2005，21(4)：1 063-1 092. " target="_blank">
[12]	SHAHI S K，BAKER J W. An empirically calibrated framework for including the effects of near-fault directivity in probabilistic seismic hazard analysis[J]. Bulletin of the Seismological Society of America，2011，101(2)：742-755.
[13]	NEWMARK N M. Effects of earthquakes on dams and embankments[J]. Geotechnique，1965，15(2)：139-160. " target="_blank">
[19]	DARENDELI M B，STOKOE K H. Development of a new family of normalized modulus reduction and material damping curves[R]. Austin，Texas：University of Texas，2001. " target="_blank">