Abstract
The objective of this study is to determine the tensile properties of normal-strength concrete (NSC) at elevated temperatures through direct tensile tests. The specimens were cast in cylindrical cross sections with extended ends according to RILEM TC 129-MHT. After curing, the specimens were heated in a tubular electric furnace at temperatures up to 800°C (1472°F) and then subjected to direct tension under that temperature. At 800°C (1472°F), there is a strength loss of 73% and elastic modulus reduces by 93%. Peak strain increases with increasing temperature up to 700°C (1292°F) and then shows slight reduction between 700 and 800°C (1292 and 1472°F). Complete tensile stress-strain relationships of NSC are proposed and empirical equations for determining direct tensile strength, peak strain, and elastic modulus at different temperatures are provided. Finite element method is applied to simulate the direct tensile tests using the proposed complete stress-strain relationship. Predictions based on the finite element simulations are in good agreement with the test results.
| Original language | English |
|---|---|
| Pages (from-to) | 641-650 |
| Number of pages | 10 |
| Journal | ACI Materials Journal |
| Volume | 111 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jan 2014 |
Keywords
- Direct tensile test
- Finite element model
- High temperature
- Normal-strength concrete
- Stress-strain relationship
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- General Materials Science