WUF-W 모멘트 접합부의 비탄성 반복 하중 실험

Abstract

The objective of this study is to evaluate the seismic performance of Welded Unreinforced Flange-Welded web (WUF-W)moment connections designed according to requirements of the current seismic codes. The effects of beam depth and panel zone strength on plastic rotation capacity of WUF-W moment connections were described in these tests. In total, four full-scale one-sided test specimens were considered and quasi-static cyclic testing was conducted. From the test results, it was found that test specimens having deep beam fractured in the beam flange before achieving total interstory drift angle of 0.04 radian required for Special Moment Frames (SMF) system in ANSI/AISC-341, while shallow beam specimens performed well, achieving total interstory drift angle of at least 0.04 radians. Also, WUF-W moment connections fabricated using access hole details specified in the provision are prone to premature fracture in the beam flange before satisfying the requirement of beam-to-column connections used in SMF system due to the increase of the strain demand at the toe of the beam flange..