000009840 001__ 9840
000009840 005__ 20141205153159.0
000009840 04107 $$aeng
000009840 046__ $$k2008-10-12
000009840 100__ $$aDe Oliveira, Carlos
000009840 24500 $$aFull-Scale Experimental Validation of Standardized Seismic-Resistant Cast Steel Brace Connectors

000009840 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009840 260__ $$b
000009840 506__ $$arestricted
000009840 520__ $$2eng$$aAlthough concentrically braced frames are an efficient and popular choice for the lateral force resisting systems of mid- to low-rise steel frames, their bracing connections may be prone to premature failure unless complex design and fabrication procedures are undertaken. Frames utilizing Hollow Structural Section (HSS) braces, slotted to receive a concentric welded gusset plate, are particularly susceptible to connection fracture due to stress concentrations arising from the shear lag phenomenon at the net-section. To address this issue, a cast steel connector was developed at the University of Toronto that provides a bolted connection between a circular hollow section (CHS) brace and a typical corner gusset plate. Unlike standard, fabricated, slotted-tube type connections, the cast connector is designed such that shear lag in the brace member is virtually eliminated. Thus, there is no need for cumbersome reinforcing plates in the connection region. The connector was designed using solid modeling software and finite element analysis, and cast using ASTM A958 grade steel, which is very similar to most wrought grades. This paper presents the results of a series of full-scale brace tests in which four moderately slender, compact, cold-formed CHS brace assemblies were cyclically loaded to failure. Each of the brace assemblies employed a different size of CHS and cast steel connector, with the latter in turn bolted to a typical corner gusset plate. Each of the tests followed the buckling restrained brace protocol specified in the American Institute of Steel Construction (AISC) Seismic Provisions. All of the braces survived several cycles beyond the protocol and failed in tension at the center of the brace. In each test the cast steel connectors showed no sign of yielding, illustrating that the use of a cast steel connector is a viable means of connecting CHS brace members for seismic applications.

000009840 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009840 653__ $$aDuctile concentrically braced frames, seismic resistant connections, hollow structural section bracing, cast steel

000009840 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009840 720__ $$aDe Oliveira, Carlos$$iChristopoulos, Constantin$$iPacker, Jeffrey$$iTremblay, R.$$iGray, Michael
000009840 8560_ $$ffischerc@itam.cas.cz
000009840 8564_ $$s2491664$$uhttps://invenio.itam.cas.cz/record/9840/files/11-0106.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 11-0106.
000009840 962__ $$r9324
000009840 980__ $$aPAPER