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- Title
Investigation of prefabricated bridge systems using reduced-scale models.
- Authors
Au, Alexander; Lam, Clifford; Tharmabala, Bala
- Abstract
In 2001, the Bridge Office of the Ministry of Transportation of Ontario, Canada, initiated a research project to investigate the use of prefabricated bridge technology as an innovative approach to bridge construction and rehabilitation. Two potential prefabricated systems were investigated: prefabricated composite slab-on-girder beam elements connected with cast-in-place concrete closure strips and full-depth prefabricated concrete deck-slab panels laid across new or existing girders and connected with cast-inplace inplace concrete closure segments. The proposed systems are applicable to bridges that use steel or concrete girders and trusses as longitudinal load carrying members. This paper presents the findings of a series of laboratory tests that were performed on scale models to study the overall structural behavior of the bridge systems under service loads, the long-term load effect on the longitudinal cold joints, and the ultimate punching-load capacity of the concrete deck slab. The test specimens were subjected to a minimum of 7 million load cycles, after which ultimate-strength tests were conducted on the deck slabs. Overall, the test results demonstrated the excellent performance and integrity of the prefabricated bridge systems under the applied test loads.
- Subjects
ONTARIO; PREFABRICATED bridges; PRECAST concrete construction; CIVIL engineering; BRIDGE design &; construction; STRUCTURAL engineering; STRUCTURAL frames; BARS (Engineering); INFRASTRUCTURE (Economics)
- Publication
PCI Journal, 2008, Vol 53, Issue 6, p67
- ISSN
0887-9672
- Publication type
Article
- DOI
10.15554/pcij.11012008.67.95