Vulnerability assessment of buildings based on the pseudo-dynamic testing method with sub-structuring: application to progressive collapse

Essais pseudo-dynamiques avec sous-structuration pour l'analyse de vulnérabilité des bâtiments : application à la perte de portance

Jean-Baptiste Charrié (1) , D. Bertrand (2, 1, 3) , Cédric Desprez , Stéphane Grange (2, 3, 1)

1 GEOMAS - Géomécanique, Matériaux et Structures
2 M2S - Mécanique des Matériaux et des Structures
3 INSA Lyon - Institut National des Sciences Appliquées de Lyon

Due to various natural or anthropogenic hazards, buildings’ structural members can lose their bearing capacities which can lead to the building’s progressive collapse. The latter subject is of growing interest regarding the socio-economic context [1]. Academic research on progressive collapse took off in the early 2000s, with the 9/11 attacks on the Twin Towers (NY, 2001) [1]. Analyses on large structures are mainly done numerically. On the other side, most experiments are lead on smaller structural elements. Until now, these experiments have been limited by dimensions, dynamic forces and real-time control capabilities. In earthquake engineering, the pseudo-dynamic method (PsD) is often used [2]. Experimental tests are performed quasi-statically on a structural part, while the inertial forces are computed within a time integration scheme. An extension of the method is the sub-structured PsD trials, which consists of inserting the tested part in a larger finite element mesh. Sub-structuring enables accounting for the whole structure’s effect on the tested part [3]. The paper presents a first experimental campaign, which validated the interest of the approach on a simple structural part. Another experimental campaign is underway, on larger structural members to further comfort the method’s validity to study progressive collapse.

Mots clés: Progressive collapse; Pseudo-dynamic testing; Sub-structuring; Reinforced concrete modeling; Dynamic behavior

Mots clés: Perte de portance; Pseudo-dynamique; sous-structuration; modélisation béton armé; comportement dynamique

Domaines: Sciences de l'ingénieur [physics]

Jean-Baptiste Charrié, D. Bertrand, Cédric Desprez, Stéphane Grange. Vulnerability assessment of buildings based on the pseudo-dynamic testing method with sub-structuring: application to progressive collapse. 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, M. Papadrakakis; M. Fragiadakis, Jun 2023, Athens, Greece. ⟨hal-04258693⟩