On the topological optimization of horizontal links in eccentrically braced frames

Abstract

This paper presents an implementation of structural optimization algorithms for the design of horizontal links of Eccentrically Braced Frames (EBFs) when subjected to monotonic shear loading. The objective is to study optimized geometries that open new design paths for these types of elements. With the advent of new additive manufacturing techniques such as WAAM (wire and arc additive manufacturing), energy dissipators may become one of the strategic applications for 3D printing of steel structures. For this purpose, an optimization procedure based on a displacement-controlled lateral load (push-over) applied to a single-storey EBF has been created using Abaqus FEA and Abaqus Optimization Module (ATOM). The performance of the optimized links has been compared with the performance of original links in terms of initial stiffness, yield strength, maximum strength and energy dissipation. The results show a set of promising geometrical configurations for horizontal links. Further research lines related to cyclic loading, anisotropic behaviour and advanced loading protocols are suggested.