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

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5 • 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

6 Development Length Tests # 4 BARS (BLACK & EPOXY) – 3” EMBEDMENT # 5 BARS (BLACK & EPOXY) – 4” EMBEDMENT # 6 BARS (BLACK & EPOXY) – 5” EMBEDMENT

7  Simple Lap-Splice Cxn.  Smaller Grout Volumes  Shortened Bar Lengths  Emulates Monolithic Component

8 6 in. 96 in. Precast Deck Panels 8 in. UHPC Closure Pour and Slabs Precast Deck Panel 61 in. 6 in. Deck Bulb Tee Girders Closure Pour (UHPC) 41 in. Deck Bulb Tee Prestressed Girder

9 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)

10 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 observed 3. No de-bonding of reinforcing bars during testing

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13 Rte 23 over Otego Creek

14 Precast Deck Grout Steel Girder A Precast Deck UHPC Steel Girder B Precast Deck Grout Concrete Girder C Precast Deck UHPC Concrete Girder D

15 Steel Girder Connection Concrete Girder Connection

16 • Simple Connection • No Interference • Hidden Connection • Emulates Cast-in-Place

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Composite Connections 19 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 19

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35 Finished Link Slab

36 Finished Link Slab