| Title |
Prediction of Flexural Capacity of Steel Fiber-Reinforced Ultra High Strength Concrete Beams |
| Keywords |
steel fiber;ultra high strength concrete;flexural capacity;beam;inverse analysis;강섬유;초고강도 콘크리트;휨강도;보;역해석 |
| Abstract |
The method to evaluate the flexural capacity of steel fiber-reinforced ultra high strength concrete beams was proposed in this study. An experimental program was set up and fourteen beams have been tested. Test results were compared with predictions by design code and by the proposed method, respectively. It was found that predictions by using ACI 544 Committee recommendations considerably underestimate the flexural capacity. Underestimation of flexural capacity resulted from that of tensile stress block. Three-point bending test data of notched prism specimens and their inverse analysis results were incorporated into modeling of tension stress block. The ratio of the predicted to the experimental flexural capacity was in the range of 0.98 to 1.14. The present study represents that the proposed method allows more realistic prediction of flexural capacity of steel fiber-reinforced ultra high strength concrete beams. |