Restoring Force Characteristics of Non-Slip-Type Exposed Column Base with Multi-Rows of Anchor Bolts
exposed column base
restoring force characteristics
multi-rows of anchor bolt
A non-slip-type exposed column base has been proposed by the authors, to improve slip phenomenon of an anchor-bolt-yield-type exposed column base by use of wedge device. Following advantages are obtained from usage of the wedge device. 1) No looseness at the column base occurs after anchor bolts yielding. 2) The column base can be designed as energy absorption damper in small earthquakes as well as huge ones. 3) The wedge device can be applicable for rehabilitation of conventional column bases because of easy installation in existing column bases. In this paper, the self-centering performance of the non-slip-type column base was examined by experiments on the column bases. The following conclusions were drawn. 1) The non-slip-type column base possesses the self-centering performance until the column base being in the elastic limitation of rotation. 2) The column base obtains the self-centering performance again, as the rotation returns the origin after increasing over the elastic limitation.