r27-sp42 bridge beams - kickoff meetingnsel.cee.illinois.edu/new/idotfeb26/tom_presentation.pdf ·...
TRANSCRIPT
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R27-SP42 Bridge Beams - Kickoff
MeetingJanuary 30, 2020
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Bridge Location
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Bridge Location
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Bridge Location
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IDOT Structure No. 020-3087
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IDOT Structure No. 020-3087
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IDOT Structure No. 020-3087
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IDOT Structure No. 020-3087
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IDOT Structure No. 020-3087
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Beam in Newmark Structural Engineering Laboratory
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Beam in Newmark Structural Engineering Laboratory
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Beam in Newmark Structural Engineering Laboratory
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Rebound Hammer Testing
• Compare concrete
quality at ends vs
midspan
• Rebound hammer
test results show
similar concrete
quality along the
length
• Supports to stay at
beam ends.
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• 3 point bending
• On NON-skewed supports
• Displacement control
• Deliverable: force and
displacement response for
loading to failure
• Force from actuator/load
cells
• Displacement from two
midspan potentiometers
• Non-contact displacement:
• Krypton system for
measuring displacements.
Test Setup
3d model link
https://app.sketchup.com/app?hl=en-US
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• Determine an upper bound on
force & displacement required
of test setup.
• Reponse2000
• 5ksi concrete
• 0.108 in2/strand
• 250 ksi PS strands
• 18.9 kip preload (no
losses)
• Mult ≈ 366 kip*ft
• Pult ≈ 52.5 kip
• Δult ≈ 6 in
• Actuator is 300 kip ±15” stroke
Bounding Analysis
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Beam supports
Test Setup
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Bearings for beam supports:
5” roller on each end, 6”x1” plate between roller and beam.
Wide flange for load distribution across mid-span
(TBD)
Test Setup
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• NTP on 11/16/19
• Kickoff meeting in Springfield on 12/17/19
• Scheduled for testing the week of 18th-21st
• 19th preferable for IDOT
Schedule
From the
signed work
agreement:
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• Krypton system
• Identification and tracking of points in
space and time
• Targets along each side at 1/8th points
• Mounted to blocks hot glued to beam
• Camera location? (TBD)
Discussion
Krypton