Actualités > Soutenance de Santosh Yadav (10 décembre 2021, en ligne)

Vous êtes chaleureusement conviés à la soutenance de thèse de Santosh Yadav, doctorant du laboratoire 3SR / UGA co-encadré par l’Unité de recherche AE&CC, qui se déroulera le vendredi 10 décembre à 14h dans Amphi Kilian (1381 Rue de la Piscine, 38610 Gières, France).

La soutenance sera diffusée en direct via le lien ci-dessous :
https://univ-grenoble-alpes-fr.zoom.us/j/96549125919?pwd=d3VIM01tVlJqbmRPeGVuN29iYUdyQT09
Webinar ID: 965 4912 5919
Passcode: 656883

Vous êtes priez de vous connecter quelques minutes avant le début de
la soutenance et de désactiver vos micros ainsi que vos webcams.

Titre de la thèse :

Experimental analysis of the seismic vulnerability of earth masonry reinforced with horizontal bands

Directeur et co-directeur :
– Yannick SIEFFERT | Maître de conférences , Université Grenoble Alpes | Laboratoire 3SR.
– Philippe GARNIER | Chercheur, ENSA de Grenoble | Unité de recherche AE&CC – équipe CRAterre.
– Florent VIEUX–CHAMPAGNE | Maître de conférences, Université Grenoble Alpes | Laboratoire 3SR.

Composition du jury :
– Jean–Claude MOREL | Professeur, ENTPE 
– Jean–Emmanuel AUBERT | Professeur, Université de Toulouse
– Rohit JIGYASU | Chef de projet, ICCROM
– Dina D’AYALA | Professeur, University College London
– Prem Nath MASKEY |  Professeur, Tribhuvan University

Thèse préparée au sein de l’Université Grenoble Alpes, dans le cadre de École doctorale Ingénierie – matériaux mécanique énergétique environnement procédés production, en partenariat avec Laboratoire Sols, Solides, Structures et Risques.

 Résumé de la thèse (en anglais) :

 

Earthquake is one of the major natural disasters taking the lives of thousands of people around the world. Such losses can be minimized by an application of a proper intervention approach. One of the traditional techniques is the application of horizontal seismic bands. Due to limited research in the past, the performance and effectiveness of such bands were not quantifiable. To address the scientific challenge faced in the field related to the use of different materials as seismic bands, a multi-scale experimental approach is used in this study. The building typology is referred from Nepal in this study; however, this is relevant to many other countries, where earthen masonry structures are practiced. A multi-scale approach is used for the experimental campaign to study the behavior of two types of materials (timber and reinforced concrete) when used as a seismic band. The materials used for the test are adobe, extruded adobe, and mud mortar. The material properties are characterized experimentally. Five wallets are tested under quasi-static cyclic loading- three walls using adobe and two using extruded adobe brick. Finally, three 1:2 reduced scale models are tested with dynamic shake table tests.

The results from quasi-static cycle tests provide the fundamental structural behavior properties of the masonry wall, with and without a seismic band. Three reduced scale dynamic tests on the house model highlight the benefit of having the seismic band and comparing the behavior using two materials as a seismic band regarding the natural frequency, damping, energy dissipation, crack propagation control, and others. The structural behavior is enhanced with the application of the seismic band, and there are some advantages in the performance of the RC band structure over
the timber seismic band.