抄録
This paper is the second report on behavior of beam-column joint consist of steel beam and steel-hoop-concrete composite column. Triangle stiffners are used in the joint. In the previous paper published in the Transaction of A.I.J., No.416, a mechanical model which can explain the ultimate strength of the panel was proposed. In this model, concrete was replaced by a simple strut. This paper mainly discusses the adequacy of the proposed model by examining the strain of the steel and the hoops in the panel. Three numbers of two dimensional cross shaped beamcolumn joint specimens and a three dimensional specimen were made and tested. The stability of the panel under large deflection and the effect of the priorloading from the beam set in one direction on the behavior of the panel loaded from another direction were also investigated. The following conclusions were obtaind. (1) The restoring force characteristics of the panel is stable and the restoring force almost never degrades. (2) The effect of the prior loading from one direction appears as the decrease of the restoring force when the shear strain of the panel is relatively small, but cannot be observed as the strain becomes large. (3) In case the section of the flange of the cross H-shaped steel is relatively large, it is necessary to consider it as a shear resisting element. The panel moment resisted by the flange can be calculated by eq. (3).
