- Author
- Knab, L. I. | Clifton, J. R.
- Title
- Cumulative Damage of Reinforced Concrete Subjected to Repeated Impact.
- Coporate
- National Bureau of Standards, Washington, DC Defense Nuclear Agency, Washington, DC
- Journal
- Cement and Concrete Research, Vol. 12, 359-370, 1982
- Distribution
- AVAILABLE FROM National Technical Information Service (NTIS), Technology Administration, U.S. Department of Commerce, Springfield, VA 22161. Telephone: 1-800-553-6847 or 703-605-6000; Fax: 703-605-6900. Website: http://www.ntis.gov
- Keywords
- reinforced concretes; impact testing; damage; penetration
- Abstract
- This study was performed to develop methods of measuring the cumulative damage of steel reinforced concrete slabs subjected to repeated impact. Cumulative damage was monitored by measuring the crater depth and the reduction in ultrasonic pulse velocity across the impact region. Crater depth generally increased with increasing number of impacts and therefore was determined to be a reasonable indicator of cumulative damage. The percent reduction in velocity generally increased with increasing number of impacts up to about 40 percent or more of the total number of impacts to failure.