高変形能高力ボルトを用いた長締め半剛結柱基部接合部の力学的挙動に関する解析的検討

抄録

In this research, high strength and high ductility long bolts with waisted shank are applied to the semi-rigid column anchor connection as a type of long bolted tensile connections. The mechanical behavior of the semi-rigid column anchor connection with the waisted shank long bolts is investigated by a FEM analysis considering the contact/non-contact behavior between the bottom base plate and the footing concrete. Discussed in the paper is the effect of the long high strength bolts with waisted shank on the ultimate strength and the behavior up to the ultimate state of the anchor connection of the column specimens subjected to bending. The performance of the column anchor connections with high strength bolts with waisted shank is compared with that of the connections with normal high strength bolts. The connection with high strength bolts with waisted shank can increase the ultimate horizontal displacement of the top of the column specimens with this type of anchor connection and improve energy absorption capacity due to the high deformability compared with the column specimens with the anchor connection by normal high strength bolts.