Comparative study of methods for analysing the seismic behaviour of a masonry chimney

Costa, Alexandre A.;Saraiva Esteves Pacheco De Almeida, João;Rosière, Loick;Valter, Lopes;Guedes, João Miranda
(2023) Revista Portuguesa de Engenharia de Estruturas — Vol. III, n° 2, p. 79-88 (2023)

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Abstract
The preservation of industrial chimneys, as part of the industrial heritage, requires a detailed survey of their geometric, mechanical, static and dynamic characteristics, to perform a correct assessment of their structural seismic behaviour, and evaluate reinforcement needs. This paper presents a study on an industrial chimney located in the city of Porto with the aim of: (i) identifying its dynamic behaviour, resorting to in-situ techniques using free and forced vibration, and PCB and MEMS type accelerometers; (ii) determining its seismic behaviour, using linear numerical simulation techniques with shell elements, and material and geometric non-linear simulation with beam elements with fibre sections, through SAP2000 and SeismoStruct structural analysis programs, respectively. The study concludes on the effectiveness of each of the 2 types of accelerometers and dynamic excitation techniques in the study of industrial chimneys, and underlines the importance of non-linear simulations when identifying the seismic behaviour of this type of structures.
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