抄録
The purpose of these experiments is to give some data on the load-deflection curve for the base of the three-dimensional elasto-plastic analysis and to investigate the behavior of the steel space building frames. One story, one span and one bay small-sized steel space frames with the Joint Block type connections are tested under alternately repeated horizontal load. These frames are designed to fail by the column mechanism. The main variables are put on the eccentricity of space frames, the axial force ratio of column and the orientation of horizontal load. Based on the experimental results and these evaluation, several conclusions may be summarized as follows (1) The obvious plastic flow and the strain-hardening region are recognized at the virgin load-deflection curve. (2) Regardless of the eccentricity of space frames, the load-deflection hysteresis loops of space frames are stable and show the Masing's shape. (3) The elastic stiffness and the plastic collapse load of space frames are decreased by the existence of eccentricity. (4) Good agreement between the experimental and analytical results is found. (5) The Joint Block type connections are regarded as the rigid connections.
