engleski

Vibrations in buildings induced by small-scale turbines for urban wind harvesting: a case study

Vibrations induced by machinery, traffic and other stochastic frequency-rich sources may cause deformations and cracks on both structural and non-structural elements but also fatigue related problems. Moreover, vibrations in buildings may cause discomfort for people and animals. On the other hand, wind turbines may often be found in urban areas surrounded by buildings or placed a top of a building. Although the turbines support green engineering and production of clean energy, they also produce vibrations that may negatively influence the behaviour of both structures and living beings. This paper aims to investigate effects of vibrations generated by small-scale wind turbines placed on buildings in urban areas. A platform for this research is a soil-structure-wind turbine system, where the structures selected for this case study are typical buildings that can be found in city of Osijek. The aim of this research is to set the stage for a small-scale wind turbine that will harvest green energy in Osijek in near future. Numerical analysis was performed using software SAP2000, while program SeismoSignal was employed for interpretation of analysis results. Parametric analysis provides results in the light of displacement response spectrums and acceleration response spectrums taken from characteristic structural elements on different floors compared with code-based thresholds. In addition, parametric study provides transfer functions calculated by dividing output (structural vibration) and input (vibration of the top of the turbine) signals pointing out amplified frequencies by structural members.

vibrations, building, small-scale wind turbine, case study

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