000018403 001__ 18403
000018403 005__ 20170118182220.0
000018403 04107 $$aeng
000018403 046__ $$k2017-01-09
000018403 100__ $$aKim, Sung-Yong
000018403 24500 $$aSeismic Retrofit of Welded Steel Moment Connections With Highly Composite Slabs

000018403 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018403 260__ $$b
000018403 506__ $$arestricted
000018403 520__ $$2eng$$aIn the 1994 Northridge earthquake, connection damage initiated from the beam bottom flange was prevalent. The presence of a concrete slab and resulting composite action was speculated as one of the critical causes of the prevalent bottom flange fracture. Close review of past experimental studies recently conducted by the author clearly indicated that conventional seismic steel moment connections with highly composite slabs were much more vulnerable to the bottom flange fracture. In this study, seismic retrofit schemes are presented for welded steel moment connections with highly composite floor slabs typical of existing steel moment frames in Korea. Because top flange modification of existing beams is not feasible due to the presence of a concrete floor slab, bottom flange modifications by using welded triangular or straight haunches, and by beam web strengthening with heavy shear tab were cyclically tested and analyzed. Test results of this study showed that the retrofit schemes used is effective in eliminating the detrimental effects associated with high composite action and can ensure excellent connection plastic rotation exceeding 4% rad. Side effects as a result of each retrofit scheme as well as design recommendations are also presented.

000018403 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018403 653__ $$aSeismic retrofit; Welded steel moment connection; Slab effect; Heavy shear tab; Straight haunch; Triangular haunch

000018403 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018403 720__ $$aKim, Sung-Yong$$iLee, Cheol-Ho
000018403 8560_ $$ffischerc@itam.cas.cz
000018403 8564_ $$s444430$$uhttps://invenio.itam.cas.cz/record/18403/files/1382.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1382.
000018403 962__ $$r16048
000018403 980__ $$aPAPER