A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Overload Testing of an Experimental Prestressed Concrete Bridge
An experimental, prestressed concrete I-beam bridge was constructed and tested at The Pennsylvania State University. One span of this two-span, simply supported curved bridge had a conventional, reinforced, composite, cast-in-place concrete deck; the other was constructed with precast, prestressed concrete planks topped with reinforced cast-in-place concrete. Each span was supported by six precast, prestressed concrete I-beams. The structure was instrumented for measuring beam strains and deflections, deck concrete surface strains, and deck reinforcing steel strains. Various methods were also employed to monitor deck deterioration. The behavior of the bridge was studied under static load, repeated load, and overload conditions during a 2-1/2 year test period. Test results indicated no significant differences in the structural behavior of the two spans, implying that current design methods are applicable to bridge decks utilizing precast, prestressed planks. However, present design methods appear to be conservative for both types of construction. Beam strains and deflections, deck strains, and live load moments were all considerably below the values indicated by design computations. Lateral load distribution to the interior beams showed close agreement with design values; however, load distribution to the exterior beams was 53 percent greater than design. Longitudinal wheel load distribution agreed closely with currently accepted theory. Bridge behavior under overload substantiated the linear behavior assumed in current design.
Overload Testing of an Experimental Prestressed Concrete Bridge
An experimental, prestressed concrete I-beam bridge was constructed and tested at The Pennsylvania State University. One span of this two-span, simply supported curved bridge had a conventional, reinforced, composite, cast-in-place concrete deck; the other was constructed with precast, prestressed concrete planks topped with reinforced cast-in-place concrete. Each span was supported by six precast, prestressed concrete I-beams. The structure was instrumented for measuring beam strains and deflections, deck concrete surface strains, and deck reinforcing steel strains. Various methods were also employed to monitor deck deterioration. The behavior of the bridge was studied under static load, repeated load, and overload conditions during a 2-1/2 year test period. Test results indicated no significant differences in the structural behavior of the two spans, implying that current design methods are applicable to bridge decks utilizing precast, prestressed planks. However, present design methods appear to be conservative for both types of construction. Beam strains and deflections, deck strains, and live load moments were all considerably below the values indicated by design computations. Lateral load distribution to the interior beams showed close agreement with design values; however, load distribution to the exterior beams was 53 percent greater than design. Longitudinal wheel load distribution agreed closely with currently accepted theory. Bridge behavior under overload substantiated the linear behavior assumed in current design.
Overload Testing of an Experimental Prestressed Concrete Bridge
R. M. Barnoff (author) / J. A. Orndorff (author) / R. B. Harbaugh (author)
1977
147 pages
Report
No indication
English
Testing prestressed concrete bridge
Engineering Index Backfile | 1952
Testing prestressed concrete bridge
Engineering Index Backfile | 1952
| Engineering Index Backfile | 1956
Testing of a damaged prestressed concrete bridge
| Tema Archive | 1999