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• Bolted End-Plate Splice Method for Composite Column (BB Splice for PSRC Column)

• 저자: 임종진, 김대경, 이승환, 엄태성

• Abstract: A bolted end-plate splice (BB splice) of L-shaped steel angles for encased composite column (PSRC column) is investigated. End plates are welded to the end of the spliced angles at a shop and are butted to each other with bolt tightening. Due to the bearing surface of end-plate, it is easy to connect column splice and the number of bolts can be reduced with a consideration of tensile resistance of bolts. The deformation and prying action need to be considered for a bolted end-plate splice, because the centroids of the angle and bolt sections do not coincide. Thus, the minimum thickness of end plate is proposed based on the yield line theory, and the tensile strength of the connection decreased by the prying force is estimated. The direct tension tests of bare angle splice and flexural tests of the encased composite column are performed to investigate the strength and failure mode of the connection. In addition, the stress distribution and force transfer mechanism are investigated through the finite element analysis. The proposed design method of bolted end-plate splice agrees well with the experimental and analytical results.