Wind-Induced response of skybridges

Abstract

Today, more buildings with green areas or sky gardens are found in cities. Singapore is one of the countries pioneering in this kind of project where the high-rise buildings are linked by pedestrian bridges. In the design of these skybridges, wind-induced response plays an important role. However, only a limited study on wind effects of skybridges has being done. In this study, a comprehensive procedure has been proposed to investigate the wind effects on a skybridge. Using semi-rigid aeroelastic models to simulate the buildings, the relative movements between the two buildings are measured by Laser Positioning System (LPS). From which, the movement of the skybridge are computed. Furthermore, to determine the vertical motion of the skybridge due to wind, an elegant method is proposed, whereby the auto and cross power spectral densities on the skybridge are measured, and the vertical response of the bridge modeled as a plate structure is determined by random vibration theory.