| Autor: |
Sagar, R. Vidya, Raghu Prasad, B. K., Kumar, S. Shantha |
| Předmět: |
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| Zdroj: |
Proceedings of the Institution of Civil Engineers: Bridge Engineering; Dec2012, Vol. 165 Issue 4, p233-244, 12p |
| Abstrakt: |
Reinforced concrete beam specimens were tested under incremental cyclic loading and the acoustic emission released during the fracture process of concrete was used to compute the acoustic emission-based b-values. The b-value based on Gutenberg–Richter formula was calculated from the frequency–amplitude plots of acoustic emission released. The strains in steel and concrete were compared with the corresponding b-value at various stages of loading to assess damage occurred in reinforced concrete beam specimens. The code of practice IS 456:2000 has defined limits for serviceability and collapse. A brief review of the application of acoustic emission testing to concrete structures is given. It is observed that the b-value reaches its minimum near the peak load and reaches maximum during micro cracking while it tends to decrease when micro cracks coalesce and start forming major and visible cracks. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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