H形鋼を用いた十字形集合材の弾塑性安定に関する実験および多線型解析

Abstract

An experimental study was made of the behavior of cruciform frames, using mild steelmodels with wide flange sections. A varying horizontal force was applied to a frame modelunder a constant vertical load on the columns. From the horizontal force-displacement relation, a considerable reduction was observed in the restoring force due to the column loads, indicatingthe importance of the unstable character due to dead loads on the horizontal restoring force intall buildings.Theoretical assessment was also made rigorously to the restoring-force characteristies, on thebasis of trilinear moment-curvature relation. The analysis takes account of the shearing defor-mation of the members and of large rigidity at the beam-to-column connection.