A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Strain and deflection were determined for a 22-ft 3-in. aluminum box culvert during backfilling and under static live load. The structure was instrumented at the crown and haunches with electrical-resistance strain gages on the structural plates and stiffening ribs, and curvature meters on the plates. This instrumentation permitted determination of average bending on five corrugations across a 54-in. wide structural plate. In addition, crown displacement was monitored at five locations with potentiometers. The laboratory testing showed that the structural plates and stiffening ribs were not fully composite in resisting applied loads, with the amount of composite action being less at the haunches than the crown. The structure's response was determined at 18 increments of backfill from the footing to 22 in. over the crown. Response under the final asphalt paving was also measured. For the live-load test, a 32-kip dual-tire truck axle was statically positioned at a number of locations over the crown. These tests were performed on the subgrade and with the finished paving in place. Measured response of the structure is compared with estimates from finite-element analysis and design equations.
Strain and deflection were determined for a 22-ft 3-in. aluminum box culvert during backfilling and under static live load. The structure was instrumented at the crown and haunches with electrical-resistance strain gages on the structural plates and stiffening ribs, and curvature meters on the plates. This instrumentation permitted determination of average bending on five corrugations across a 54-in. wide structural plate. In addition, crown displacement was monitored at five locations with potentiometers. The laboratory testing showed that the structural plates and stiffening ribs were not fully composite in resisting applied loads, with the amount of composite action being less at the haunches than the crown. The structure's response was determined at 18 increments of backfill from the footing to 22 in. over the crown. Response under the final asphalt paving was also measured. For the live-load test, a 32-kip dual-tire truck axle was statically positioned at a number of locations over the crown. These tests were performed on the subgrade and with the finished paving in place. Measured response of the structure is compared with estimates from finite-element analysis and design equations.
Behavior of a Corrugated-Metal Box Culvert
D. B. Beal (author)
1986
53 pages
Report
No indication
English
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