Model updating of a dynamic model of a composite steel-concrete railway viaduct based on experimental tests

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Joel Malveiro (Autor) Outra; Diogo Ribeiro (Autor) Outra; Carlos Sousa (Autor) FEUP; Rui Calçada (Autor) FEUP

Revista

Título: Engineering Structures

Vol. 164

Páginas: 40-52

ISSN: 0141-0296

Editora: Elsevier

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 22 Citações

INSPEC

Outras Informações

ID Authenticus: P-00N-Q9D

DOI: 10.1016/j.engstruct.2018.02.057

Abstract (EN): This paper presents a procedure to obtain the physical properties of the finite-element (FE) model of a railway viaduct, suitable for the estimation of the deck slab's dynamic response during the passage of trains. This procedure is based on experimental results and involves two phases. The first phase consists in the calibration, using a genetic algorithm, to calculate the optimal values for the most influential physical properties, which maximise the agreement between the experimental modal parameters and the ones provided by the FE model. The experimental modal parameters are determined through a dynamic test under forced random vibration. The second phase consists in the modification of the value of two physical properties, the horizontal stiffness of the supports and the modal damping coefficients. These properties have to be adjusted as they lead to different dynamic performances of the structure, depending on whether the structure is subjected to low intensity ambient vibration actions, or subjected to high intensity loads during the passage of trains. The adjustment is based on the slab's dynamic response (displacements, strains and accelerations) measured during the passage of real trains.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13