Synonyms
Coherency; Dynamic; Pseudo-static; Seismic analysis; Spatial variability; SVGM
Introduction
The seismic design of structures considers that all ground supports are subjected simultaneously to identical seismic excitation. This assumption is not valid for extended structures since it has been recognized that seismic motion exhibits no negligible variability. This variability, called spatial variability of ground motion (SVGM), must hence be considered in the design of extended structures.
Many questions arise: what is SVGM and how does one model it? Does SVGM increase or decrease internal forces of a structure? Is there any general conclusion that can be drawn while considering SVGM?
This entry aims at answering these questions. The first part of this entry addresses the description of SVGM through models in terms of coherency function. Subsequently, the response of structures subjected to SVGM is derived. At this stage, the concept of pseudo-static and dynamic responses is...
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Abrahamson N, Schneider J, Stepp J (1991) Empirical spatial coherency functions for applications to soil-structure interaction analyses. Earthquake Spectra 7(1):1–27
Benmansour N, Djafour M, Bekkouche A, Zendagui D (2012) Seismic response evaluation of bridges under differential ground motion: a comparison with the new Algerian provisions. Eur J Environ Civil Eng 16(7):1–19
Berrah MK, Kausel E (1992) Response spectrum analysis of structures subjected to spatially varying motions. Earthq Eng Struct Dyn 21(6):461–470
Deodatis G (1996) Non-stationary stochastic vector processes: seismic ground motion applications. Probab Eng Mech 11(3):149–167
Der Kiureghian A (1996) Coherence model for spatially varying ground motions. Earthq Eng Struct Dyn 25(1):99–111
Shinozuka M (1971) Simulation of multivariate and multi dimensional random processes. J Acoust Soc Am 49(1):357–367
Zendagui D, Berrah M, Kausel E (1999) Stochastic de-amplification of spatially varying ground motions. Soil Dyn Earthq Eng 18(6):395–471
Zerva A (2009) Spatial variation of seismic ground motions. Modeling and engineering applications. CRC Press, Boca Raton
Zerva A, Zervas V (2002) Spatial variation of seismic ground motions: an overview. Appl Mech Rev 55(3):271–296
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 Springer-Verlag Berlin Heidelberg
About this entry
Cite this entry
Berrah, M.K., Zendagui, D., Djafour, M. (2015). Spatial Variability of Ground Motion: Seismic Analysis. In: Beer, M., Kougioumtzoglou, I.A., Patelli, E., Au, SK. (eds) Encyclopedia of Earthquake Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35344-4_142
Download citation
DOI: https://doi.org/10.1007/978-3-642-35344-4_142
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-35343-7
Online ISBN: 978-3-642-35344-4
eBook Packages: EngineeringReference Module Computer Science and Engineering