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Published in: Geotechnical and Geological Engineering 5/2022

12-01-2022 | Original Paper

Influence of Earthquake Characteristics on Pervious Concrete Column Improved Ground

Authors: R. S. V. Rashma, B. R. Jayalekshmi, R. Shivashankar

Published in: Geotechnical and Geological Engineering | Issue 5/2022

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Abstract

In this paper, the influence of earthquake characteristics on the seismic performance of ground improved with pervious concrete columns in place of conventional stone columns is presented. Two scaled earthquake ground motions with different seismic characteristics are applied to the finite element models of ground with and without column inclusions. Total stress analysis is also conducted and compared with effective stress analysis on maximum response profile along the depth of column improved ground. The study is further extended to sandwiched liquefiable soil deposits of varying thickness. It is noted that the average lateral displacement reduction of the pervious concrete column improved ground is 90% when compared to unimproved sand strata when subjected to two different earthquake excitations. It is found that the generation of excess pore pressure reaches near zero values when the permeability of pervious concrete column is greater than 0.3 m/s irrespective of the characteristics of the earthquake events. From total stress analysis and effective stress analysis, it is observed that for column improved ground, in addition to pore pressure build-up, the maximum response profile is highly influenced by significant duration and frequency of seismic excitation. The pervious concrete column performed better in homogeneous sand deposit as well as sandwiched liquefiable soil of varying thickness when subjected to different seismic excitations with different characteristics.

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Metadata
Title
Influence of Earthquake Characteristics on Pervious Concrete Column Improved Ground
Authors
R. S. V. Rashma
B. R. Jayalekshmi
R. Shivashankar
Publication date
12-01-2022
Publisher
Springer International Publishing
Published in
Geotechnical and Geological Engineering / Issue 5/2022
Print ISSN: 0960-3182
Electronic ISSN: 1573-1529
DOI
https://doi.org/10.1007/s10706-022-02050-8

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