Abstract
In this paper the results of experimental studies with respect to deformation of the base plate itself which was specified in Report 1 are mainly shown. In those experiments welded and riveted specimens were used as reported in the preceding report; one of each was given simple bending and the other was acted upon by eccentric loading. Two columns were connected to each other on the back surface of each base plate with four finished bolts which represented the anchor bolts. The results of experiments are shown in the following: 1) The rotation of column anchorage including the deformation between the column and its base plate and the deformation of both the base plate itself and the connecting bolts, showed an almost equal tendency in both cases of the simple bending and eccentric loading. 2) The difference of deformation was remarkably influenced by the difference of moment under the equal axial forces. 3) In the case of simple bending, the deformation of riveted base plate was about two times that of welded specimens, but in the case of eccentric loading, the former was greater than the latter by 20%. 4) The deformation of base plate itself was almost inversely proportional to its flexural rigidity.
