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NEES Project Warehouse

Collaborative Developments for Seismic Rehabilitation of Vulnerable Braced Frames
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Experiment-8: NCBF2: UW Non-Seismic Concentrically Braced Frame (NCBF) with Bolted Continuous Shear Tab and Ductile HSS Brace
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DOI:10.4231/D3ST7DX9M
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 continuous bolted shear tab connections at brace-beam-column intersections. The connections were deficient with respect to the 2010 AISC Seismic Provisions but the brace was a highly ductile HSS. Connection deficiencies included gusset-to-beam weld fracture (evaluated using the balanced design procedure), beam-to-shear tab bolt shear, gusset plate-to-shear tab bolt shear, 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: October 02, 2013 - October 02, 2013
Facility: University of Washington, WA, United States
Equipment:
Specimen Type: Braced Frame
Material: Columns Columns (view)
Shear Tab Shear Tab (view)
Bolts Bolts (view)
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Sensors: Optotrak
LabView
Drawings:
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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). "NCBF2: UW Non-Seismic Concentrically Braced Frame (NCBF) with Bolted Continuous Shear Tab and Ductile HSS Brace", Network for Earthquake Engineering Simulation (distributor), Dataset, DOI:10.4231/D3ST7DX9M