BEHAVIOR OF THE LINK COUPLING BEAM ON THE ECCENTRICALLY BRACED FRAME

Long links on eccentrically braced frames (EBF) have lower performance than short and intermediate links. Failure of long occurs faster that medium due to the influence bending moment, which is more dominant at ends link shear forces. The objective this research improve by delaying failure buckling fracture flange web ends. According AISC 341, cross-sectional capacity outside beam greater link. addition coupling beams retention elements in middle, with classification as or links, so can be avoided. In paper, we extend approach increase stiffness extending toward inside throughout This new element called (LCB). test was classified into two tests, standard beam. results showed there a significant all LCBs compared Performance shown parameters strength plastic rotation. It obtained highest LCB nominal ratio (V n ) between range 1.0–1.25. Keywords: Link Coupling Beam, Shear Strength, Plastic Rotation, Overstrength DOI： https://doi.org/10.35741/issn.0258-2724.58.4.54