The evaluation of the seismic behaviour of underground structures represents one of the most actual seismic geotechnical and structural engineering research topics about the study of the complex phenomena of soil-structural interaction. In the last decades, different types of simplified and numerical approaches have been developed for the correct analysis of the seismic vulnerability of these important infrastructures and a series of laboratory tests for the seismic behaviour characterization of the soils (resonant column test, etc.) and of the coupled soil-structure system (centrifuge test, etc.) have been conducted, especially after the recent strong earthquakes where the underground structures have been subjected to significant damages. In the same way, in the last few years, the International Codes are beginning to pay attention to the concepts of the seismic design of these structures. Despite the significant development of knowledge, described above, still remain open several uncertainties of the correct reproduction of the underground structures behaviour under seismic load. In this paper, the evaluation of the seismic behaviour of a multi-propped retaining structure was conducted, considering the soil-structure interaction effects. The results of the 2D equivalent linear analysis are analysed in terms of bending moment acting on the concrete retaining walls.

2D equivalent linear analysis for the seismic vulnerability evaluation of multi-propped retaining structures

Zucca M.;Tropeano G.;
2019

Abstract

The evaluation of the seismic behaviour of underground structures represents one of the most actual seismic geotechnical and structural engineering research topics about the study of the complex phenomena of soil-structural interaction. In the last decades, different types of simplified and numerical approaches have been developed for the correct analysis of the seismic vulnerability of these important infrastructures and a series of laboratory tests for the seismic behaviour characterization of the soils (resonant column test, etc.) and of the coupled soil-structure system (centrifuge test, etc.) have been conducted, especially after the recent strong earthquakes where the underground structures have been subjected to significant damages. In the same way, in the last few years, the International Codes are beginning to pay attention to the concepts of the seismic design of these structures. Despite the significant development of knowledge, described above, still remain open several uncertainties of the correct reproduction of the underground structures behaviour under seismic load. In this paper, the evaluation of the seismic behaviour of a multi-propped retaining structure was conducted, considering the soil-structure interaction effects. The results of the 2D equivalent linear analysis are analysed in terms of bending moment acting on the concrete retaining walls.
978-993594361-3
L‘évaluation du comportement sismique des structures souterraines représentent un des sujets de recherche les plus courants sismique, géotechnique et de construction, qui concerne l‘étude du phénomène complexe de l‘interaction sol-structure. Pendant les dernières décennies, différents types d‘approches simples et numeriques ont été développés pour une analyse exacte de la vulnérabilité sismique de ces infrastructures importantes et encore une série de tests de laboratoire pour la caractérisation du comportement sismique du sols (test de colonne résonnante etc.) et du système couplé du sol-structure (test de centrifugation etc.) ont été menées, après le fort tremblement de terre où les structures souterraines ont subi des dommages importants. De la même manière, pendant les dèrnieres années, les Codes Internationales ont commencé a prêter plus d‘attention aux concepts de désign sismique de ces structures. Malgré la considèrable connaissance, décrit ci-dessus, il y a quand même de l‘incertitude sur la correcte reproduction du comportement des structures sous charge sismique. Dans cet article, il a été mené l‘evaluation du comportement sismique des structures de soutenement multi-etayé, considérant que les effets de l‘interaction sol-structure. Les resultats de l‘analyse linéaire 2D equivalente sont analysées en termes de moment de flexion agissant sur les murs de soutènement en béton.
Underground structures; Soil-structure interaction; Finite element analysis, Seismic vulnerability.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11584/328831
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