"Incidence de l`armature de confinement sur la performance parasismique des poteaux en beton arme "

Abstract

"In earthquakes that occurred recently, many reinforced concrete structures were severely damaged or completely destroyed. In this context a study was conducted in trying to devalue the different capacities of deformation and resistance, and estimate the level of ductility and energy dissipated for braced structures by self- stable skeleton in reinforced concrete (R+4, R+2) at 2 and 3 bays, in the efficacy of the parameters of containment is modeled under the term transverse reinforcement, they governed the deformation capacity of the columns. Our work aims to evaluate the ratio of these frames of the confinement, they are analyzed by regulatory expressions recommended with RPA code 2003 version (zone 2 and zone 3) and those advocated by some codes of notoriety (EC8 and NZS) .. ………………………………………………………………………………... We evaluate the real capacity sectional linear elements; rectangular Column and beam style T. The resulting deformations of a relative movement and plastic rotations obtained are concentrated at the plastic hinges at their ends. This concept is widely used by guides or evaluation of seismic vulnerability of buildings procedures. We idealize the real curves of sections by limits prescribed in FEMA 356. ……………………. By Pushover analysis is obtained close to the actual state of the structure behavior, which gives us the training and development of plastic hinges, head displacements, the capacity curves...etc.……..……………………………………………………………………………. This analysis allowed us to assess the level of performance and the capacities obtained strength end ductility, specify the level of damage and failure mechanisms that detect weak bonds of the structure.……………..………………………………………………………….. It is concluded at the end that the capacity of local ductility of the structures studied is satisfied for all the recommended codes, but the problem lies in the structural behavior from the point view of resistance, because the variation in the number of level affects the structural behavior. And the inclusion of table the compression in the beams (section of T) which states the ratio of resistant end moments of a node: high beam and low column."