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NEES Project Warehouse

Collaborative Developments for Seismic Rehabilitation of Vulnerable Braced Frames
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Experiment-9: NCBF3-1: UW Non-Seismic Concentrically Braced Frame (NCBF) with Bolted Split Shear Tab and Non-Ductile HSS Brace
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DOI:10.4231/D3HD7NT5M
Experiment Type: Large Scale
Description: This specimen consisted of a single-bay one-story concentrically braced frame with single-diagonal bracing. The frame was intended to be representative of existing non-seismic concentrically braced frames (NCBFs) with split bolted shear tab connections at brace-beam-column intersections. The braces and connections were deficient with respect to the 2010 AISC Seismic Provisions. The HSS brace did not meet the compactness limit for highly ductile members required for SCBFs (b/t = 22.8 > 13.2). Connection deficiencies included beam-to-shear tab bolt bearing and shear, gusset plate-to-shear tab bolt shear, gusset plate-to-beam weld fracture (evaluated using the balanced design procedure), brace net section rupture, and brace block shear rupture. AWS E71-T11 weld metal, which does not meet minimum toughness requirements for demand critical welds, was used. The specimen was loaded quasistatically through a load beam bolted to the north beam using a reversed cyclic increasing amplitude loading protocol. Traditional physical sensors and optical sensors were installed on the specimen. Portions of the specimen were whitewashed to detect yielding.
Dates: November 18, 2013 - November 18, 2013
Facility: University of Washington, WA, United States
Equipment:
Specimen Type: Braced Frame
Material: Columns Columns (view)
Brace Brace (view)
Gusset Plates Gusset Plates (view)
more...

Sensors: Optotrak
LabView
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Data:
Trial ( ? ) Repetition ( ? ) Interactive ( ? ) UnprocessedConvertedCorrectedDerived
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Tags (keywords):
  1. Full scale testing
  2. NCBF
  3. quasi-static
  4. Braced Frame
  5. connection
Cite this work:
Ryan Ballard, Charles Roeder, Dawn Lehman, Jeffery Berman (2015). "NCBF3-1: UW Non-Seismic Concentrically Braced Frame (NCBF) with Bolted Split Shear Tab and Non-Ductile HSS Brace", Network for Earthquake Engineering Simulation (distributor), Dataset, DOI:10.4231/D3HD7NT5M