Structural seismic fragility analysis of RC frame with a new family of Rayleigh damping models

Pierre Jehel (1) , Pierre Léger (2) , Adnan Ibrahimbegovic (3)

1 MSSMat - Laboratoire de mécanique des sols, structures et matériaux
2 Département de Génie Civil - École Polytechnique de Montréal
3 LMT - Laboratoire de Mécanique et Technologie

Structural seismic vulnerability assessment is one of the key steps in a seismic risk management process. Structural vulnerability can be assessed using the concept of fragility. Structural fragility is the probability for a structure to sustain a given damage level for a given input ground motion intensity, which is represented by so-called fragility curves or surfaces. In this work, we consider a moment-resisting reinforced concrete frame struc- ture in the area of the Cascadia subduction zone, that is in the South-West of Canada and the North-West of the USA. According to shaking table tests, we first validate the capability of an inelastic fiber beam/column element, using a recently developed concrete constitutive law, for representing the seismic behavior of the tested frame coupled to either a commonly used Rayleigh damping model or a proposed new model. Then, for each of these two damping models, we proceed to a structural fragility analysis and in- vestigate the amount of uncertainty to be induced by damping models.

Mots clés: Earthquake; Damping; Inelastic time-history analysis; Structural fragility; Fiber beam element; Reinforced concrete frame structure

Domaines: Mécanique des structures [physics.class-ph]; Mécanique des solides [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]; Structures

Pierre Jehel, Pierre Léger, Adnan Ibrahimbegovic. Structural seismic fragility analysis of RC frame with a new family of Rayleigh damping models. Manolis Papadrakakis, George Stefanou, Vissarion Papadopoulos. Computational Methods in Stochastic Dynamics - Vol. 2, 26, Springer, pp.267-291, 2013, Computational Methods in Applied Sciences, 978-94-007-5134-7. ⟨10.1007/978-94-007-5134-7⟩. ⟨hal-00730603⟩