Direct Displacement-Based Design (DDBD) applied to dual wall-frame buildings and steel concentric braced frames

Abstract

One of the most efficient seismic design methodologies is Direct Displacement Based Design (DDBD) because it considers the inelastic range of the structure. There are several investigations on the application of this methodology in frames, structural wall and bridges, but those related to steel structures with concentric bracing are scarcer. The objective of this investigation is to determine the damping parameters and the seismic responses of a dual concrete building and one of concentrically braced steel frames, to later compare their base loads and displacements. The procedure first determines the design offset for the 1GDL model; then the desired responses are obtained by this displacement. This methodology uses an effective stiffness, which is composed of an elastic and an inelastic state of the structure to determine seismic responses.