Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
Effect of rigid versus flexible supports on the design of a bridge through topology optimization
Submission Author:
Josue Labaki , SP
Co-Authors:
Iago Cavalcante, Renato Picelli, Xiaodong Huang, Josue Labaki
Presenter: Josue Labaki
doi://10.26678/ABCM.MECSOL2022.MSL22-0123
Abstract
This article investigates the consequences of considering rigid or flexible supports in the design of a bridge through topology optimization. Flexible supports consist of elastic piles embedded in a homogeneous soil layer, which are modeled via a coupled finite- and boundary-element scheme. This represents the support case that actual bridges can experience in civil engineering practice. The rigid support case is obtained by simply imposing zero-displacement at the supported nodes of the finite element mesh of the bridge. The bridge is modeled with a non-design deck, under uniformly distributed vertical loads, which is a reasonable approximation to its working condition. Topology optimization in this analysis is performed with the classical Bi-directional Evolutionary Structural Optimization (BESO) method. The objective function is the minimization of the compliance of the bridge, subject to a given volume reduction. The results show that considering rigid or pile supports has a significant effect on the resulting optimal topology, as well as on the achievable compliance of the bridge.
Keywords
Topology optimization, Soil-Structure Interaction, BESO
