Authorial method of evaluating vibrational comfort of occupants of high-rise buildings based on aeroelastic model tests / Aleksander Pistol, Łukasz Flaga, Piotr Krajewski, Andrzej Flaga // W: EURODYN ... więcej

Authorial method of evaluating vibrational comfort of occupants of high-rise buildings based on aeroelastic model tests / Aleksander Pistol, Łukasz Flaga, Piotr Krajewski, Andrzej Flaga // W: EURODYN 2020 : Proceedings of the XI International Conference on Structural Dynamics, Athens, Greece, 23-26 November 2020. Vol. 1 [Dokument elektroniczny] / eds. M. Papadrakakis, M. Fragiadakis, C. Papadimitriou. – Greece : Institute of Structural Analysis and Antiseismic Research. School of Civil Engineering. National Technical University of Athens (NTUA), 2020. – S. 1968-1987 : fot., plany, rys., tab., wykr. – Tryb dostępu: https://generalconferencefiles.s3-eu-west-1.amazonaws.com/eurodyn_2020_ebook_procedings_vol1.pdf. – Bibliogr. 5 poz., Abstr. – ISBN 978-618-85072-2-7 (set). – ISBN 978-618-85072-0-3 (vol I)

Wind-induced vibrations are an issue not only for the structure safety, but also for the comfort of its occupants, especially in residential buildings. This paper provides the setup, methodology and results ... więcej

Wind-induced vibrations are an issue not only for the structure safety, but also for the comfort of its occupants, especially in residential buildings. This paper provides the setup, methodology and results of wind tunnel aeroelastic model tests of twin high-rise (95 m high) residential buildings located in Warsaw, Poland. The aim of the tests was to assess the degree in which vibrations may be uncomfortable or harmful to the occupants of these buildings. The evaluation of vibrational comfort was conducted according to the general rules provided in ISO 6897. Measurements during both the tuning and the wind tunnel tests were performed with a system of accelerometers which allowed for direct measurement of structure accelerations, comparable with threshold values provided in the standard. The tests for each building were performed for 12 different angles of wind attack. Main non-dimensional dynamic numbers considered in the analysis were the ratios of corresponding natural frequencies in model and reallife scales, Strouhal numbers, mass scales and logarithmic decrements of damping. A mathematical model was developed which allowed for addressing the problem of coupling between the vibrations in the two main directions for angles of wind attack that are not perpendicular to the main axes of the building. As the buildings are located in dense urban development with many even taller neighbors, the influence of aerodynamic interference was crucial for the tests. Moreover, performing the tests on two buildings with a similar shape allows for comparison and assessment of the scale of influence of this interference. Besides the direct results which could be applied by the designers, these tests show the practical aspects of scaling and dimensional analysis for model tests of complicated physical phenomena, which can be used for solving actual technical and engineering problems.