Evaluation of Spliced Sleeve Connections for Precast RC Bridge Piers

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General Information
Study Number: TPF-5(257)
Lead Organization: Utah Department of Transportation
Solicitation Number: 1307
Partners: NY, TX, UT
Contractor(s): University of Utah
Status: Closed
Est. Completion Date:
Contract/Other Number:
Last Updated: Jun 07, 2016
Contract End Date:
Financial Summary
Contract Amount:
Total Commitments Received: $110,000.00
100% SP&R Approval: Approved
Contact Information
Lead Study Contact(s): David Stevens
davidstevens@utah.gov
Phone: 801-589-8340
FHWA Technical Liaison(s): Wen-huei (Phil) Yen
Wen-huei.Yen@fhwa.dot.gov
Phone: 202-493-3056
Organization Year Commitments Technical Contact Name Funding Contact Name Contact Number Email Address
New York State Department of Transportation 2012 $50,000.00 Harry White Wes Yang 518-457-4660 wes.yang@dot.ny.gov
Texas Department of Transportation 2012 $10,000.00 Lloyd Wolf Ned Mattila 512-416-4727 ned.mattila@txdot.gov
Utah Department of Transportation 2012 $50,000.00 Jason Richins David Stevens 801-589-8340 davidstevens@utah.gov

Study Description

NCHRP Project 12-74 developed and validated design methodologies, design and construction specifications, and example connection details for precast bent cap systems using emulative and hybrid connections for integral and non-integral systems for seismic regions. This was achieved through an experimental and analytical program focused on a select set of connection details. Seven bent cap to column component tests were conducted including a cast-in-place control specimen, a full ductility grouted duct specimen, one cap pocket full ductility and one limited ductility specimen, and three hybrid full ductility specimens. One girder to bent cap component test was conducted on the integral connection detail.

The present project considers connections between reinforced concrete precast columns and precast footings or precast columns and precast bent caps using splice sleeve connections for seismic regions. This involves the use of steel hardware to splice the bars in-situ with high strength grout and is thus different than the connections studied in NCHRP Project 12-74. Splice sleeve connections have been studied in the past but only in the context of reinforced concrete buildings. Previous tests included connections between wall panels (both horizontal and vertical joints), and connections at beam mid-span, beam near column end, and beam-column joints.

Objectives

Although the splice sleeve connection has been used in buildings, there is currently no data for use of this connection in bridges located in seismic regions. The increased use of Accelerated Bridge Construction for constructing reinforced concrete bridge bents makes the investigation of the splice sleeve connection an important topic. The project aims at performing quasi-static cyclic tests to verify the capacity of the splice sleeve connection in seismic regions for connecting precast concrete elements such as footings to columns and columns to a cap beam.

Scope of Work: The project involves quasi-static cyclic testing of substructures for typical precast concrete bridge elements using splice sleeve connections that utilize large diameter bars. Primary longitudinal reinforcement for the footing, column and the bent cap will be designed based on capacity protection measures and force-transfer mechanism requirements as presented in the AASHTO Seismic Guide Specification (AASHTO 2009). Shear reinforcement near the joint region and joint shear reinforcement will be designed in accordance with the assumed force transfer mechanism of AASTHO (2009).

The tasks for this project are:

¿ Tests of three precast reinforced concrete column to footing splice sleeve connections. The 8 ft long column will consist of an 18 in. square cross-section with six #8 mild steel bars. The footing will be 6 ft by 3 ft in plan and 2 ft thick.

¿ Tests of three precast reinforced concrete column to bent cap splice sleeve connections. The 5 ft long column will consist of a 18 in. square section with six #8 mild steel bars. The bent cap will be 10 ft long with a 22 in. square cross-section.

Scope of Work

The project involves quasi-static cyclic testing of substructures for typical precast concrete bridge elements using splice sleeve connections that utilize large diameter bars. Primary longitudinal reinforcement for the footing, column and the bent cap will be designed based on capacity protection measures and force-transfer mechanism requirements as presented in the AASHTO Seismic Guide Specification (AASHTO 2009). Shear reinforcement near the joint region and joint shear reinforcement will be designed in accordance with the assumed force transfer mechanism of AASTHO (2009).

The tasks for this project are:

¿ Tests of three precast reinforced concrete column to footing splice sleeve connections. The 8 ft long column will consist of an 18 in. square cross-section with six #8 mild steel bars. The footing will be 6 ft by 3 ft in plan and 2 ft thick.

¿ Tests of three precast reinforced concrete column to bent cap splice sleeve connections. The 5 ft long column will consist of a 18 in. square section with six #8 mild steel bars. The bent cap will be 10 ft long with a 22 in. square cross-section.

Comments

This project is the first phase of a larger effort to establish seismic connections for precast concrete structural elements used in Accelerated Bridge Construction. It is expected that once this first phase is complete, full-scale tests of bridge bents utilizing splice sleeve connections for large diameter bars will be carried out in the second phase.

Documents Attached
Title File/Link Type Privacy Download
Final Report, Oct. 2014 12-8775 Final Report-Grouted Splice Sleeve.pdf Final Report Public
Acceptance Memo Acceptance Memo signed.PDF Memorandum Public
TPF-5(257) Closeout Letter TPF-5(257) Closeout Letter - Signed.pdf Memorandum Public
TPF-5(257) Closeout Funding Spreadsheet TPF-5(257) Closeout Funding Spreadsheet.pdf Other Public
2011 4th Quarter 2011 4th Quarterly Report.docx Quarterly Progress Report Public
2012 1st Quarter 2012 1st quarterly report.pdf Quarterly Progress Report Public
2012 2nd Quarter 2012 2nd Quarterly Report.docx Quarterly Progress Report Public
2012 3rd Quarter 2012 3rd Quarterly Report.docx Quarterly Progress Report Public
2012 4th Quarter 2012 4th Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2013 1st Quarter 2013 1ST Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2013 2nd Quarter 2013 2nd Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2013 3rd Quarter 2013 3rd Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2013 4th Quarter 2013 4th Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2014 1st Quarter 2014 1st Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2014 2nd Quarter 2014 2nd Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2014 3rd Quarter 2014 3rd Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2014 4th Quarter 2014 4th Quarterly Report TPF-5(257)-rev.docx Quarterly Progress Report Public

Evaluation of Spliced Sleeve Connections for Precast RC Bridge Piers

General Information
Study Number: TPF-5(257)
Lead Organization: Utah Department of Transportation
Solicitation Number: 1307
Partners: NY, TX, UT
Contractor(s): University of Utah
Status: Closed
Est. Completion Date:
Contract/Other Number:
Last Updated: Jun 07, 2016
Contract End Date:
Financial Summary
Contract Amount:
Total Commitments Received: $110,000.00
100% SP&R Approval:
Contact Information
Lead Study Contact(s): David Stevens
davidstevens@utah.gov
Phone: 801-589-8340
FHWA Technical Liaison(s): Wen-huei (Phil) Yen
Wen-huei.Yen@fhwa.dot.gov
Phone: 202-493-3056
Commitments by Organizations
Organization Year Commitments Technical Contact Name Funding Contact Name Contact Number Email Address
New York State Department of Transportation 2012 $50,000.00 Harry White Wes Yang 518-457-4660 wes.yang@dot.ny.gov
Texas Department of Transportation 2012 $10,000.00 Lloyd Wolf Ned Mattila 512-416-4727 ned.mattila@txdot.gov
Utah Department of Transportation 2012 $50,000.00 Jason Richins David Stevens 801-589-8340 davidstevens@utah.gov

Study Description

Study Description

NCHRP Project 12-74 developed and validated design methodologies, design and construction specifications, and example connection details for precast bent cap systems using emulative and hybrid connections for integral and non-integral systems for seismic regions. This was achieved through an experimental and analytical program focused on a select set of connection details. Seven bent cap to column component tests were conducted including a cast-in-place control specimen, a full ductility grouted duct specimen, one cap pocket full ductility and one limited ductility specimen, and three hybrid full ductility specimens. One girder to bent cap component test was conducted on the integral connection detail.

The present project considers connections between reinforced concrete precast columns and precast footings or precast columns and precast bent caps using splice sleeve connections for seismic regions. This involves the use of steel hardware to splice the bars in-situ with high strength grout and is thus different than the connections studied in NCHRP Project 12-74. Splice sleeve connections have been studied in the past but only in the context of reinforced concrete buildings. Previous tests included connections between wall panels (both horizontal and vertical joints), and connections at beam mid-span, beam near column end, and beam-column joints.

Objectives

Although the splice sleeve connection has been used in buildings, there is currently no data for use of this connection in bridges located in seismic regions. The increased use of Accelerated Bridge Construction for constructing reinforced concrete bridge bents makes the investigation of the splice sleeve connection an important topic. The project aims at performing quasi-static cyclic tests to verify the capacity of the splice sleeve connection in seismic regions for connecting precast concrete elements such as footings to columns and columns to a cap beam.

Scope of Work: The project involves quasi-static cyclic testing of substructures for typical precast concrete bridge elements using splice sleeve connections that utilize large diameter bars. Primary longitudinal reinforcement for the footing, column and the bent cap will be designed based on capacity protection measures and force-transfer mechanism requirements as presented in the AASHTO Seismic Guide Specification (AASHTO 2009). Shear reinforcement near the joint region and joint shear reinforcement will be designed in accordance with the assumed force transfer mechanism of AASTHO (2009).

The tasks for this project are:

¿ Tests of three precast reinforced concrete column to footing splice sleeve connections. The 8 ft long column will consist of an 18 in. square cross-section with six #8 mild steel bars. The footing will be 6 ft by 3 ft in plan and 2 ft thick.

¿ Tests of three precast reinforced concrete column to bent cap splice sleeve connections. The 5 ft long column will consist of a 18 in. square section with six #8 mild steel bars. The bent cap will be 10 ft long with a 22 in. square cross-section.

Scope of Work

The project involves quasi-static cyclic testing of substructures for typical precast concrete bridge elements using splice sleeve connections that utilize large diameter bars. Primary longitudinal reinforcement for the footing, column and the bent cap will be designed based on capacity protection measures and force-transfer mechanism requirements as presented in the AASHTO Seismic Guide Specification (AASHTO 2009). Shear reinforcement near the joint region and joint shear reinforcement will be designed in accordance with the assumed force transfer mechanism of AASTHO (2009).

The tasks for this project are:

¿ Tests of three precast reinforced concrete column to footing splice sleeve connections. The 8 ft long column will consist of an 18 in. square cross-section with six #8 mild steel bars. The footing will be 6 ft by 3 ft in plan and 2 ft thick.

¿ Tests of three precast reinforced concrete column to bent cap splice sleeve connections. The 5 ft long column will consist of a 18 in. square section with six #8 mild steel bars. The bent cap will be 10 ft long with a 22 in. square cross-section.

Comments

This project is the first phase of a larger effort to establish seismic connections for precast concrete structural elements used in Accelerated Bridge Construction. It is expected that once this first phase is complete, full-scale tests of bridge bents utilizing splice sleeve connections for large diameter bars will be carried out in the second phase.

Title File/Link Type Private
Final Report, Oct. 2014 12-8775 Final Report-Grouted Splice Sleeve.pdf Final Report Public
Acceptance Memo Acceptance Memo signed.PDF Memorandum Public
TPF-5(257) Closeout Letter TPF-5(257) Closeout Letter - Signed.pdf Memorandum Public
TPF-5(257) Closeout Funding Spreadsheet TPF-5(257) Closeout Funding Spreadsheet.pdf Other Public
2011 4th Quarter 2011 4th Quarterly Report.docx Quarterly Progress Report Public
2012 1st Quarter 2012 1st quarterly report.pdf Quarterly Progress Report Public
2012 2nd Quarter 2012 2nd Quarterly Report.docx Quarterly Progress Report Public
2012 3rd Quarter 2012 3rd Quarterly Report.docx Quarterly Progress Report Public
2012 4th Quarter 2012 4th Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2013 1st Quarter 2013 1ST Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2013 2nd Quarter 2013 2nd Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2013 3rd Quarter 2013 3rd Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2013 4th Quarter 2013 4th Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2014 1st Quarter 2014 1st Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2014 2nd Quarter 2014 2nd Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2014 3rd Quarter 2014 3rd Quarterly Report TPF-5(257).docx Quarterly Progress Report Public
2014 4th Quarter 2014 4th Quarterly Report TPF-5(257)-rev.docx Quarterly Progress Report Public

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