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UHPC for Accelerated Bridge Construction (DOT Experience)
Mathew Royce PE Director Structures Policy and Innovation Bureau Office of Structures NYSDOT
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UHPC for Accelerated Bridge Construction (DOT Experience) Mathew - - PowerPoint PPT Presentation
UHPC for Accelerated Bridge Construction (DOT Experience) Mathew - - PowerPoint PPT Presentation
1 UHPC for Accelerated Bridge Construction (DOT Experience) Mathew Royce PE Director Structures Policy and Innovation Bureau Office of Structures NYSDOT 2 Compression Behavior 3 Tensile Behavior 4 5 Deck-to-Deck Deck-to-Girder
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Tensile Behavior
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- Deck-to-Deck
- Deck-to-Girder
- Deck Beam-to-Deck Beam
- Column-to-Footing/Cap
- Girder-to-Girder
- Deck-to-Barrier
- Headers for Expansion Joint
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Development Length Tests
# 4 BARS (BLACK & EPOXY) – 3” EMBEDMENT # 5 BARS (BLACK & EPOXY) – 4” EMBEDMENT # 6 BARS (BLACK & EPOXY) – 5” EMBEDMENT
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Simple Lap-Splice Cxn. Smaller Grout Volumes Shortened Bar Lengths Emulates Monolithic
Component
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Precast Deck Panels and Slabs
61 in. 6 in. Closure Pour (UHPC) Deck Bulb Tee Prestressed Girder 41 in.
6 in. UHPC Closure Pour Precast Deck Panel 8 in. 96 in.
Deck Bulb Tee Girders
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Joint Testing by FHWA for Strength Durability and Performance
8 ” THI CK PANEL - # 4 EPOXY COATED HAI RPI N BARS 8 ” THI CK PANEL - # 5 GALV. STRAI GHT BARS ( 6 ” LAP) 8 ” THI CK PANEL - # 5 BLACK STRAI GHT BARS ( 6 ” LAP) 8 ” THI CK PANEL - # 5 BLACK HEADED BAR ( 3 ½ ” LAP) 6 ” THI CK PANEL - # 5 BLACK STRAI GHT BARS ( 6 ” LAP) 6 ” THI CK PANEL - # 5 BLACK HEADED BARS ( 3 ½ ” LAP)
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Test Conclusions
- 1. Joint system emulates or surpasses C I P
monolithic decks hence can be designed similar to CIP decks
- 2. No interface de-bonding during testing was
- bserved
- 3. No de-bonding of reinforcing bars during
testing
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Rte 23 over Otego Creek
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Precast Deck Grout Steel Girder
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Precast Deck Grout Concrete Girder
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Precast Deck UHPC Steel Girder
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Precast Deck UHPC Concrete Girder
D
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Steel Girder Connection Concrete Girder Connection
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- Simple Connection
- No Interference
- Hidden Connection
- Emulates Cast-in-Place
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Composite Connections NYSDOT collaborated with the industry, trade associations and the FHWA in developing and testing Composite Connections between Precast Decks and steel/concrete girders using UHPC. The results are documented in the following report: Composite Connections for Precast Concrete Bridge Decks. NTIS Accession No. PB2012-107569 FHWA Publication No. FHWA-HRT-12-041
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Finished Link Slab
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