Study Detail View Print

Evaluation of Spliced Sleeve Connections for Precast RC Bridge Piers

General Information

Study Number: TPF-5(257) Status: Closed Contract/Other Number:
Lead Agency: Utah Department of Transportation Last Updated: Jun 7, 2016
Contract Start Date: Est. Completion Date: Contract End Date:
Solicitation Number: 1307
Partners: NY , TX , UT
Contractor(s): University of Utah

Contact Information:

Lead Agency 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
Investigator(s):
  c.pantelides@utah.edu
Phone: 801-585-3991


Financial Summary:

Contract Amount: Total Commitments Received: $110,000.00 100% SP&R Approval: Approved


Commitments by Organization:

Agency Year Commitments Funding Contact Name Contact Number Email Address
New York State Department of Transportation 2012 $50,000.00 Wes Yang 518-457-4660 wes.yang@dot.ny.gov
Texas Department of Transportation 2012 $10,000.00 Ned Mattila 512-416-4727 rtimain@txdot.gov
Utah Department of Transportation 2012 $50,000.00 David Stevens 801-589-8340 davidstevens@utah.gov


Study Description

Background:
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.


Documents:

TitleTypePrivate
Final Report, Oct. 2014 Final Report N
Acceptance Memo Memorandum N
TPF-5(257) Closeout Letter Memorandum N
TPF-5(257) Closeout Funding Spreadsheet Other N
2011 4th Quarter Quarterly Progress Report N
2012 1st Quarter Quarterly Progress Report N
2012 2nd Quarter Quarterly Progress Report N
2012 3rd Quarter Quarterly Progress Report N
2012 4th Quarter Quarterly Progress Report N
2013 1st Quarter Quarterly Progress Report N
2013 2nd Quarter Quarterly Progress Report N
2013 3rd Quarter Quarterly Progress Report N
2013 4th Quarter Quarterly Progress Report N
2014 1st Quarter Quarterly Progress Report N
2014 2nd Quarter Quarterly Progress Report N
2014 3rd Quarter Quarterly Progress Report N
2014 4th Quarter Quarterly Progress Report N


Solicitation Documents:

There are no attached documents at this time.

 
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