| Title |
Uncertainty Analysis of Deflections in Reinforced Concrete Beam Using High-Strength Concrete |
| Keywords |
Beam ; High Strength Concrete ; Deflection ; Variability |
| Abstract |
In recent year, applications of high-strength concrete have increased, and high-strength concrete has now been used in many parts of the world. The growth has been possible as a result of recent developments in material technology and a demand for high-strength concrete. As expected, the prediction and control of deflections may be increasingly important because the size of structural members can be potentially be reduced by the use of high-strength concrete. However, the existing equations and procedures used to predict and control deflections are based on tests using normal-strength concretes. High-strength concretes have mechanical properties that are different from those of normal-strength concrete. It may not be appropriate for high-strength concrete beams in the calculation of immediate deflections as well as long-time deflections. The variability of deflections in normal-strength concrete beams may also be different from that of deflections in high-strength concrete beams. This paper discusses these issues and demonstrates through the developed probabilistic model some differences between the variability of deflections in beams made with normal and high-strength concretes. The results of high-strength concrete beams show that the variability of deflections is higher for higher reinforcement ratio and higher applied moment to cracking moment ratio. |