Static and Dynamic Loading of Pretensioned Concrete Beams
Abstract
A study was made to determine how flexural members should be designed, how to gain the greatest resistance to blast loading, where they should be used, and the best way to destroy structures composed of such members. Nine simply supported pretensioned beams were tested in the blast simulator either statically or dynamically. In the dynamic tests the beams were subjected to long- and short-duration loading. As expected, the load capacity of the beams subjected to short duration loads was greater than that of those subjected to long-duration loads. The deflection time traces showed that no tensile stresses occurred in the top fiber for any of the loads applied and that a permanent deformation can be considered negligible for loads less than 85% of the ultimate load. A method of predicting the static ultimate deflection is presented and applied to one of the beams. The experimental data is compared with the theory. All of the statically tested beams failed in bond near the supports. In the dynamic tests, two beams failed by concrete compression at mid-span, and the rest failed in bond. A solution for dynamic response, which includes damping, is shown and applied to one of the tests.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1962
- Accession Number
- AD0278118
Entities
People
- S. K. Takahashi
Organizations
- Naval Facilities Engineering Service Center