Rehabilitation RC Structure Using Eccentric Metallic Bracing and parametric study to Shear Link Thickness

Abstract

Many existing buildings designed before the seismic code need effective bracing system to improves performance,  the eccentric bracing can improve

the resistance and ductility, and improve energy dissipation , compensate the lack of stiffness that may occur when deformation increases, beside many of important Advantages such as light weight, ease of installation and maintenance after exposure to strong shocks, and can contribute in  torsion reduce in many irregular horizontally school buildings.

The capacity curves of the studied building was found by applying pushover to it before and after bracing by using different thicknesses of the shear link, and determining the performance point and performance level.

Proposed system increased stiffness, the maximum deformation, and the energy dissipation due to its high efficiency, which reduced the demand and the level of damage and improved the performance in the studied direction. It was performed by using a shear link of 5 cm thickness, as it increased to become an immediate occupancy level, while it remained at the level of life safety by using the two thicknesses 4 and 7.5 cm which are less than and more than 5 cm, thus achieving the best performance of the braced construction.