SEISMIC RESPONSE ANALYSIS CONSIDERING HYSTERESIS CHARACTERISTIC OF HIGH STRENGTH BOLT CONNECTION OBTAINED FROM LOADING TEST

— Demand of strength for connection of bucklin-restrained brace considering variation of mechanical properties Part2 —

Abstract

Seismic response of the passive controlled structure using buckling-restrained braces (BRB) can be ensured when the BRB connection have sufficient strength. This paper investigates demand of connection strength considering hysteresis characteristics of high-strength bolt connections. Cyclic loading test are conducted to clarify hysteresis characteristics of connection including slip behavior under excessive bearing displacement, and the analytical model of connection is proposed from test results. By using the proposed analytical model, seismic response of steel frames with BRB dumpers are numerically analyzed and the strength of BRB bolt connections necessary to secure sufficient energy dissipation and dumping effect is suggested as connection factor.