Improved Connection Details for Adjacent Prestressed Bridge Beams

Roberts-Wollmann, Carin; Cousins, Thomas; Halbe, Kedar; Field, Carrie; Virginia Polytechnic Institute and State University. Dept. of Environmental Engineering

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Improved Connection Details for Adjacent Prestressed Bridge Beams

2015-03-01
By Roberts-Wollmann, Carin ; Cousins, Thomas ; Halbe, Kedar ; ...

[PDF-2.08 MB]

English

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Creators:

Roberts-Wollmann, Carin ; Cousins, Thomas ; Halbe, Kedar ; Field, Carrie

Roberts-Wollmann, Carin ; Cousins, Thomas ; Halbe, Kedar ; Field, Carrie Less -
Corporate Creators:

Virginia Polytechnic Institute and State University. Dept. of Environmental Engineering
Corporate Contributors:

United States. Federal Highway Administration ; United States. Dept. of Transportation. Research and Innovative Technology Administration ; Virginia. Dept. of Transportation

United States. Federal Highway Administration ; United States. Dept. of Transportation. Research and Innovative Technology Administration ; Virginia. Dept. of Transportation Less -
Subject/TRT Terms:

[+]

Box Beams Cracking Grout High Performance Concrete Prestressed Concrete Bridges Reinforcing Bars Research Hub Splicing Structural Connection Ultra High Performance Concrete
Publication/ Report Number:

CAIT-UTC-001
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Rutgers University. Center for Advanced Infrastructure and Transportation
NTL Classification:

NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures
Abstract:

Bridges with adjacent box beams and voided slabs are simply and rapidly constructed, and are well suited to short to medium spans. The traditional connection between the adjacent members is a shear key ﬁlled with a conventional non-shrink grout. With time and traﬃc, many of the joints show signs of cracking and leaking, and eventually, corrosion of the reinforcing and prestressing steel within the beams. The overarching goal of this project was to develop an improved detail for the connection between adjacent members using Ultra-High Performance Concrete (UHPC) or Very High Performance Concrete (VHPC). The speciﬁc objective of the research presented in this report was to determine the appropriate splice length for No. 4 and No. 6 uncoated reinforcing bars used in a UHPC or VHPC connection. A total of 15 beams were tested to determine the appropriate splice lengths for uncoated No. 4 and No. 6 bars in UHPC and VHPC. The 12 in tall by 10 in wide by 8.5 ft beams were precast with conventional concrete, with a block-out pocket to accommodate a splice. The tension bars were spliced in the pocket, which was then ﬁlled with either VHPC or UHPC. The beams were tested to place the splice location in a region of constant moment, and were loaded monotonically to failure. It was found that for an uncoated No. 4 bar in UHPC or VHPC a splice length of 4 in is adequate to develop the yield strength of the bar, but a length of 5 in is recommended to insure ductility. For a No. 6 bar in UHPC a splice length of 5 in is adequate to develop the yield strength, but 6 in is recommended to insure ductility.
Format:

PDF
Funding:

DTRT12-G-UTC16
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:cf9b0708cffb970f5a56e12267eab6886d5c707f651a88fee2163b6fceea23a2
Download URL:

https://rosap.ntl.bts.gov/view/dot/29017/dot_29017_DS1.pdf
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Improved Connection Details for Adjacent Prestressed Bridge Beams

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