対角方向水平力を受ける鋼管塔状立体トラス構造物の力学的挙動について

Abstract

Strength and ductility of latticed steel towers can be considerably affected by the magnitudesas well as the directions of external forces caused by earthquakes and wind.An experimental investigation was carried out in order to examine the properties of overallload-deflection relationship and instability of typical space tubular towers subjected to monotonicor cyclic horizontal loads which act on the tops of the towers in the diagonal directions.The experimental results are compared with the results obtained from the past experiment byusing identical specimens subjected to the horizontal loading along the principal axes of the towersections, and the characteristics of the stress distributions of the towers are discussed. Also, buckling strength of the components are estimated by taking into consideration the actual bound-ary conditions, under combined bending and axial forces.