高層建物の質量減衰パラメーターによる空力不安定性について

Abstract

This paper describes a wind tunnel study to investigate the effects of wind directions andmass-damping parameters on the response of a square prism with the aspect ratio 4.5 to 1. Thesimultaneous measurements of along and cross wind responses are carried out by a dynamic modelbalance with two degrees of freedom. A series of tests are performed to assess the effects ofchanges in stiffness, mass, damping, and wind direction. These tests are conducted by placing themodel in a turbulent shear layer which is generated in a wind tunnel with the working section 2.5 mwide, 2 m high and 21 m long. The maximum response of a square-section tall building with anusual mass-damping parameter is generally found to occur in the cross wind direction when thewind is blowing perpendicularly onto a face.