38 ノンスリップ型鉄骨露出柱脚の復元力特性モデル

概要

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Generally, an exposed column base consists of anchor bolts and an elastic thick base plate. Restoring force characteristics of the column base are observed to be slip-type due to a gap between a nut of the anchor bolt and the base plate, caused by the plastic elongation of the anchor bolt. A new technique for improving the slip-type behavior has been proposed by the authors. This exposed column base with wedge devices shows non-slip-type restoring force characteristics instead of slip-type ones. In this paper, models of the new restoring force characteristics were proposed and compared with experimental results. The following conclusions were drawn. 1) The restoring force characteristics of all kinds of exposed column bases can be shown as slip-type models. 2) The cyclic characteristics of all kinds of exposed column bases with wedge devices can be shown as non-slip-type models, that is, build-up-from-origin-type ones. 3) Because the models of the characteristics for the column bases with wedge devices can be simply calculated, they can be easily applied to seismic response analysis.
一般社団法人日本建築学会の論文
2005-03-20