Development of Stress-Strain Relationship Considering Strength and Age of Concrete

Title & Authors
Development of Stress-Strain Relationship Considering Strength and Age of Concrete
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Abstract
Many investigators have tried to represent the nonlinear behavior of stress-strain relationship of concrete using mathematical curves. Most of empirical expressions for stress-strain relationship, however, have focused on old age concrete, and were not able to represent well the behavior of concrete at an early age. Where wide understanding on the behavior of concrete from early age to old age is very important in evaluating the durability and service life of concrete structures. In this paper, effect of 5 different strength levels and ages of from 12 hours to 28 days on compressive stress-strain relationship was observed experimentally and analytically. Tests were carried out on $\small{\phi}$100$\small{{\times}}$200mm cylindrical specimens water-cured at 20$\small{{\pm}}$3$\small{^{\circ}C}$. An analytical expression of stress-stain relationship with strength and age was developed using regression analyses on experimental results. For the verification of the proposed model, the model was compared with present and existing experimental data and some existing models. The analysis shows that the proposed model predicts well experimental data and describes well effect of strength and age on stress-strain relationship.
Keywords
stress-strain relationship;strength;age;early ages (of concrete);compressive strength;
Language
Korean
Cited by
References
1.
ACI Journal, Proceedings, 1985. vol.82. 6, pp.797-804

2.
ACI Materials Journal, 1995. vol.92. 6, pp.617-624

3.
ACI Journal, Proceedings, 1982. vol.79. 6, pp.484-490

4.
Computers and Structures, 1993. vol.48. 5, pp.819-825

5.
Research Report No. 82-10, 1982. pp.255

6.
ACI Journal, Proceedings, 1982. vol.79. 1, pp.13-27

7.
ACI Journal, Proceedings, 1964. vol.61. 3, pp.345-350

8.
ACI Journal, Proceedings, 1955. vol.52. 4, pp.455-480

9.
Douglas McHenry International Symposium on Concrete and Concrete Structures, 1987. vol.SP-55. pp.161-185

10.
ACI Journal, Proceedings, 1978. vol.75. 11, pp.603-611

11.
Progress Report, National Science Foundation Grant No. PPR 78-22878, 1979. pp.29