軸力と任意方向水平力を受けるH形鋼柱材の弾塑性性状に関する実験的研究

抄録

Wide-flange steel beam-columns are tested under constant vertical and two-dimensional monotonic or cyclic horizontal loads in order to make clear the three-dimensional inelastic behavior, and to grasp new problems which do not appear in the plane frames. As the experimental parameters, the direction of the horizontal load and vertical load ratio are selected. Experimental behavior is investigated and experimental results of maximum horizontal loads are compared with the results computed by strength formulae. Rigid plastic analysis is performed to investigate the state of collapse mechnism. The summaries are as follows ; 1) For beam-columns subjected to monotonic biaxial bending, it seems that displacement v is limited to a certain value, different from in case of uniaxial bending.2) Mechanism curves estimate the general tendency after the maximum load attained. 3) As to the cyclic behavior, H-^^-__υ loops start to drift away from original point in one direction when the displacement amplitude becomes large. 4) Load-deflection relations become more stable as the angle θ becomes large. 5) Strength formulae used in the plastic design of steel structure are conservative. 6) Maximum Strenth of beam-columus subjected to biaxial bending can be predicted by using eqs. (11), (13) and (14).