Eventos Anais de eventos
CONEM 2022
XI Congresso Nacional de Engenharia Mecânica - CONEM 2022
Topology optimization of tunnel reinforcements using an IBEM-FEM coupling model
Submission Author:
Aldemar Pontes de Siqueira Neto , PI , Brazil
Co-Authors:
Aldemar Pontes de Siqueira Neto, Renato Picelli, Josue Labaki
Presenter: Aldemar Pontes de Siqueira Neto
doi://10.26678/ABCM.CONEM2022.CON22-0055
Abstract
This paper considers the problem of finding optimal tunnel reinforcement distribution in the soil-structure interaction problem of a deep excavated tunnel. Topologies that result in the smallest compliance of the tunnel-soil system under prescribed restrictions for material usage are sought through the classical Bi-directional Evolutionary Structural Optimization (BESO) method. The buried tunnel is modeled via a combination of superposition of influence functions, in the sense of the Indirect Boundary Element Method (IBEM) to model the soil as an unbounded domain, together with an enclosed, optimizable portion, modeled with classical finite elements. The paper considers the cases of different in situ stresses, centered and eccentric vertical loads applied to the tunnel floor, as well as various values of reinforcement stiffness.
Keywords
Tunnel Reinforcement, Topology optimization, BESO, coupled methods, IBEM Boundary Element Method
