Structural Performance of Precast/Prestressed Bridge Double-Tee Girders Made of High-Strength Concrete, Welded Wire Reinforcement, and 18-mm-Diameter Strands
- 1 October 2013
- journal article
- research article
- Published by American Society of Civil Engineers (ASCE) in Journal of Bridge Engineering
- Vol. 18 (10), 1053-1061
- https://doi.org/10.1061/(asce)be.1943-5592.0000458
Abstract
This paper presents the development of high-strength precast prestressed double-Tee girders for bridge construction. These girders use high-strength concrete (103 MPa), Grade 550 welded wire reinforcement, and 18-mm-diameter Grade 1860 prestressing strands at 51- by 51-mm spacing. The double-Tee section was used to simplify girder production and erection and to maximize span-to-depth ratio, which improves the construction economy and speed. To evaluate the efficiency of the developed girders, two full-scale 15.24-m long, 1.21-m wide, and 0.5-m deep single-Tee girders were fabricated by a precast producer and tested at the University of Nebraska structural laboratory. Transfer length measurements, development length testing, flexure capacity testing, and vertical and horizontal shear testing were conducted for each specimen. Test results have shown that the proposed high-strength bridge double-Tee girder can be designed using current LRFD bridge design specifications. Preliminary design charts for different girder sizes were presented to demonstrate the efficiency of these girders for short- and medium-span bridges.Keywords
This publication has 7 references indexed in Scilit:
- Bottom Flange Confinement Reinforcement in Precast Prestressed Concrete Bridge GirdersJournal of Bridge Engineering, 2012
- Modeling Structural Performance of Second-Generation Ultrahigh-Performance Concrete Pi-GirdersJournal of Bridge Engineering, 2012
- Mechanical and Bond Properties of 18-mm- (0.7-in.-) Diameter Prestressing StrandsJournal of Materials in Civil Engineering, 2012
- Use of 0.7-in.- diameter strands in pretensioned bridge girdersPCI Journal, 2011
- Welded-wire reinforcement versus random steel fibers in precast, prestressed concrete bridge girdersPCI Journal, 2011
- Development of the northeast extreme tee (NEXT) beam for accelerated bridge constructionPCI Journal, 2010
- Stress-Strain Modeling of 270 ksi Low-Relaxation Prestressing StrandsPCI Journal, 1992