Effective Parameters on Seismic Design of Rectangular Underground Structures

Underground structures are a significant part of the transportation in the modern society and in the seismic zones should withstand against both seismic and static loadings. Embedded structures should conform to ground deformations during the earthquake but almost exact evaluation of structure to gr...

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Bibliographic Details
Published in:2008 Seismic Engineering Conference Commemorating the 1908 Messina and Reggio Calabria Earthquake Part One (AIP Conference Porceedings Volume 1020, Part 1) Part 1), 2008-01, Vol.1020 (1), p.719-726
Main Authors: Amiri, G Ghodrati, Maddah, N, Mohebi, B
Format: Article
Language:English
Subjects:
CROSS SECTIONS
DEFORMATION
DEPTH
DESIGN
EARTHQUAKES
FLEXIBILITY
GEOSCIENCES
POISSON RATIO
SEISMIC WAVES
SEISMOLOGY
SOILS
STATIC LOADS
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Summary:Underground structures are a significant part of the transportation in the modern society and in the seismic zones should withstand against both seismic and static loadings. Embedded structures should conform to ground deformations during the earthquake but almost exact evaluation of structure to ground distortion is critical. Several two-dimensional finite difference models are used to find effective parameters on racking ratio (structure to ground distortion) including flexibility ratio, various cross sections, embedment depth, and Poisson's ratio of soil. Results show that influence of different cross sections, by themselves is negligible but embedment depth in addition to flexibility ratio and Poisson's ratio is known as a consequential parameter. A comparison with pseudo-static method (simplified frame analysis) is also performed. The results show that for a stiffer structure than soil, racking ratio decreases as the depth of burial decreases; on the other hand, shallow and flexible structures can suffer greater distortion than deeper ones up to 30 percents.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.2963906