境界層流中における高層建物の空力不安定振動(続) : 種々の長方形断面をもつ高層建物の場合

概要

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It was reported in our previous paper that the aeroelastic instability of a tall square sectioned building occurs in a turbulent flow. This paper describes the characteristics of unsteady aerodynamic forces acting on high-rise buildings with various sections in a turbulent boundary layer. Unsteady aerodynamic forces were severely affected by the side ratio D/B(D:depth, B:breadth) of the buildings. In order to obtain the aerodynamic forces, wind tunnel experiments were conducted by use of the forced oscillation technique. The response curves related to oscillating amplitude and the reduced wind velocity were obtained, which were plotted with the product parameters of the damping ratio and the generalized mass of the buildings. Aeroelastic instability regions for several rectangular sectioned tall buildings were clarified. The aeroelastic instability regions for prisms of D/B≦1 clearly appeared near the resonance wind velocity, while the regions for prisms of D/B≧1 appeared at lower velocities when mass-damping parameter became extremely small.
社団法人日本建築学会の論文
1996-04-30