000019946 001__ 19946
000019946 005__ 20170118182347.0
000019946 04107 $$aeng
000019946 046__ $$k2017-01-09
000019946 100__ $$aLin, Fuxiong
000019946 24500 $$aIn-Plane Seismic Frame Action Effects on Buckling-Restrained Brace Welded End Connection Performance

000019946 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019946 260__ $$b
000019946 506__ $$arestricted
000019946 520__ $$2eng$$aIn-plane buckling-restrained brace (BRB) end rotation induced by frame action is a commonly observed phenomenon in buckling-restrained braced frames (BRBFs). However, its effect on BRB end connection performance has not yet been clear. In this study, the frame action of non-moment-resisting braced frame was summarized based on previously observed BRBF responses. Four BRB end deformation modes for quick determination of BRB end rotational demand are proposed considering different BRB arrangements, the story where BRBs locate, and the boundary condition of corner gussets connected with column base. Key factors affecting BRB end rotation and BRB end moment are examined theoretically by parametric analysis. Subassemblage tests of four BRB specimens under horizontal cyclic loading were conducted by adopting two loading frames to impose the expected frame action effects. It shows that the BRB end rotation subjected the BRB ends to significant flexural moments, leading to premature yielding of the BRB ends or end zone buckling. The frame action effects and the flexural rigidity of BRB ends were found to have significant influence on BRB end connection performance. The triggering moment induced by the BRB end rotation was the main contributor to BRB end moment. However, the moment amplification effect induced by the flexure of BRB end zones became prominent especially for small flexural rigidity of BRB ends.

000019946 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019946 653__ $$abuckling-restrained brace; frame action; connection; rotation; end moment

000019946 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019946 720__ $$aLin, Fuxiong$$iWang, Zhan$$iZhao, Junxian
000019946 8560_ $$ffischerc@itam.cas.cz
000019946 8564_ $$s3310484$$uhttps://invenio.itam.cas.cz/record/19946/files/4775.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4775.
000019946 962__ $$r16048
000019946 980__ $$aPAPER