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Experimental Investigation on the Seismic Performance of Horizontally Curved Bridges
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Complete - 08/20/2013

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Multiple Shake Table Experiment of a Curved Bridge with Live Load
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DOI:10.4231/D3MG7FV94
Experiment Type: Shake Table
Description: Current bridge design specifications have few requirements concerning the inclusion of live load in the seismic design of bridges for perhaps two reasons: 1) the likelihood of the full design live load occurring at the same time as the design earthquake is deemed to be very low, and 2) adverse behavior in an earthquake due to live load has not been observed in practice. However, with increasing congestion in major cities, the occurrence of the design earthquake at the same time as the design live load is now more likely than in the past. But little is known about the effect of live load on seismic response and this paper describes an experimental project that investigates this behavior. The experimental work included shake table testing of a 2/5th-scale model of a three-span, horizontally curved, steel girder bridge loaded with a series of representative trucks. The model spanned four shake tables each synchronously excited with scaled ground motions from the 1994 Northridge Earthquake. Observations from the experimental work show the presence of the live load had a beneficial effect on performance of this bridge, but this effect diminished with increasing amplitude of shaking. During the design earthquake, the bridge with live load was essentially elastic whereas the bridge without live load suffered some yielding and the maximum displacement at the top of the column was approximately 35% less in the live load case. Parameters used to measure performance included column displacement, abutment shear force, and degree of concrete spalling in the plastic hinge zones.
Dates: September 13, 2011 - September 15, 2011
Facility: University of Nevada-Reno, NV, United States
Equipment: View Details
Specimen Type: Bridge Test 2 - Live Load: Concrete Material
Material: Concrete Column Concrete Column (view)
Sensors: Experiment6_SensorList
Drawings: more...
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Documentation:
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Tags (keywords):
  1. seismic
  2. live load
  3. horizontally curved bridge
Cite this work:
Hartanto Wibowo, Danielle Sanford, Ian Buckle, David Sanders (2013). "Multiple Shake Table Experiment of a Curved Bridge with Live Load", Network for Earthquake Engineering Simulation (distributor), Dataset, DOI:10.4231/D3MG7FV94