Vol. 2, No. 1, 2011

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An experimental model of buckling restrained braces for multi-performance optimum design

Noemi Bonessio, Giuseppe Lomiento and Gianmario Benzoni

Vol. 2 (2011), No. 1, 75–90
Abstract

This paper presents the formulation of an analytical model of buckling restrained braces (BRBs) and its implementation into a structural optimization procedure in order to design the protection system of an existing structure. The procedure, based on a multi-performance approach, provides the minimum cost design solution, through sizing and topology optimization of the BRBs, for the retrofit of an existing structure. An analytical formulation for the BRBs is developed in order to introduce an efficient characterization of these devices into the structural optimization procedure. The prediction provided by the proposed analytical model is compared with the results of an experimental test campaign and the bilinear model.

Keywords
buckling restrained braces, experimental tests, analytical model, performance-based design, structural optimization
Milestones
Received: 9 August 2011
Accepted: 5 October 2011
Published: 10 November 2011
Authors
Noemi Bonessio
Department of Structural Engineering
University of California San Diego
La Jolla, CA 92093-0085
United States
Giuseppe Lomiento
Department of Structural Engineering
University of California San Diego
La Jolla, CA 92093-0085
United States
Gianmario Benzoni
Department of Structural Engineering
University of California San Diego
La Jolla, CA 92093-0085
United States