TY - GEN
T1 - Full-scale cyclic testing of an ordinary concentrically-braced frame
AU - Bradley, C.
AU - Fahnestock, L. A.
AU - Hines, E. M.
AU - Sizemore, J.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
N2 - Steel concentrically-braced frames (CBFs) are used extensively as lateral-force-resisting systems for low to mid-rise buildings in moderate seismic regions of the United States, such as the East Coast and Midwest. CBFs are economical because they are stiff, strong, and relatively simple to design, fabricate, and erect. Although good structural performance of CBFs for typical gravity and wind loading is well-established, there is little evidence-either from experimental research or field observation-related to CBF performance when subjected to design-basis earthquake demands. CBFs in moderate seismic regions are often not specifically detailed to achieve ductile inelastic response, so the effect of brittle limit states is largely unknown. As a result of this situation, a research project was initiated to investigate the seismic performance of CBFs in moderate seismic regions. This paper summarizes one aspect of the project: a full-scale cyclic test of a one-bay two-story Ordinary Concentrically Braced Frame-focusing on the sequence of limit states and associated system behavior. The test frame exhibited ductile response characterized by brace compression buckling and tension yielding up to nearly 1.5% frame drift and then experienced sudden strength loss due to weld fractures.
AB - Steel concentrically-braced frames (CBFs) are used extensively as lateral-force-resisting systems for low to mid-rise buildings in moderate seismic regions of the United States, such as the East Coast and Midwest. CBFs are economical because they are stiff, strong, and relatively simple to design, fabricate, and erect. Although good structural performance of CBFs for typical gravity and wind loading is well-established, there is little evidence-either from experimental research or field observation-related to CBF performance when subjected to design-basis earthquake demands. CBFs in moderate seismic regions are often not specifically detailed to achieve ductile inelastic response, so the effect of brittle limit states is largely unknown. As a result of this situation, a research project was initiated to investigate the seismic performance of CBFs in moderate seismic regions. This paper summarizes one aspect of the project: a full-scale cyclic test of a one-bay two-story Ordinary Concentrically Braced Frame-focusing on the sequence of limit states and associated system behavior. The test frame exhibited ductile response characterized by brace compression buckling and tension yielding up to nearly 1.5% frame drift and then experienced sudden strength loss due to weld fractures.
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U2 - 10.1061/9780784479117.061
DO - 10.1061/9780784479117.061
M3 - Conference contribution
AN - SCOPUS:84929232836
T3 - Structures Congress 2015 - Proceedings of the 2015 Structures Congress
SP - 702
EP - 713
BT - Structures Congress 2015 - Proceedings of the 2015 Structures Congress
A2 - Ingraffea, Nathan
A2 - Libby, Mark
PB - American Society of Civil Engineers
T2 - Structures Congress 2015
Y2 - 23 April 2015 through 25 April 2015
ER -