000018841 001__ 18841
000018841 005__ 20170118182243.0
000018841 04107 $$aeng
000018841 046__ $$k2017-01-09
000018841 100__ $$aBerman, Jeffrey
000018841 24500 $$aSeismic Vulnerability and Rehabilitation of Older Concentrically Braced Frames

000018841 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018841 260__ $$b
000018841 506__ $$arestricted
000018841 520__ $$2eng$$aConcentrically braced frames (CBFs) are one of the most common lateral-force-resisting systems in steel construction. In the US, they have been used to resist earthquake loading extensively but many were built prior to 1988, before the codification of capacity-based design and other provisions which ensure ductility. These older CBFs are considered nonductile CBFs (NCBFs), and an infrastructure review of 12 NCBFs from the US was conducted to quantify the frequency and severity of global and local deficiencies relative to special CBF (SCBF) requirements, but the consequences of these deficiencies are unclear. An experimental research program was devised to advance the understanding of NCBF brace and connection deficiencies and potential retrofit schemes. This paper presents a case study of three (3) of the 18 singlediagonal-brace NCBF specimens tested; the case study specimens all had double-angle gusset-plate connections. The results demonstrate the poor behavior of a typical NCBF and two (2) partial retrofit schemes which enhanced the deformation capacity of the system. The exceptional performance of the retrofits highlights the importance of designing schemes which do not punish yield mechanisms while mitigating vulnerable failure modes.

000018841 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018841 653__ $$asteel; braced frames; connections; nonductile; rehabilitation

000018841 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018841 720__ $$aBerman, Jeffrey$$iBallard, Ryan$$iJohnson, Molly$$iSloat, Daniel$$iLehman, Dawn$$iRoeder, Charles$$iSwatosh, Marsha$$iSen, Andrew
000018841 8560_ $$ffischerc@itam.cas.cz
000018841 8564_ $$s947090$$uhttps://invenio.itam.cas.cz/record/18841/files/2332.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2332.
000018841 962__ $$r16048
000018841 980__ $$aPAPER