CHARACTERISTIC INVESTIGATION AND CYCLIC SLIP EXPERIMENT OF HSFG BOLTED JOINTS WHICH WERE DAMAGED BY EARTHQUAKE

Abstract

The major slip of high-strength friction grip (HSFG) bolted joint is the limit state on design, but it has more load carrying capacity after the slipping. When the South Hyogo earthquake was occurred in 1995, there were many bolted joints at which slip phenomena appeared, then the problem was the way of evaluating their load carrying capacity and repairing. This paper shows the characteristic investigation and the cyclic slip experiment of HSFG bolted joints that were damaged by earthquake. As results, the change of bolt tension, slip coefficient and slip load carrying capacity by cyclic slip tests are showed and the effect of energy absorption of HSFG bolted joints in big earthquake is discussed.