|
Title |
Evaluating Structural Performance of High-Strength Concrete Corbels Containing Steel and Polypropylene Fibers
|
|
Keywords |
내민받침 ; 강섬유 ; 폴리프로필렌 섬유 ; 고강도콘크리트 ; 헤디드 바 corbels ; steel fibers ; polypropylene fibers ; high strength concrete ; headed bars |
|
Abstract |
In this study, high strength concrete corbels reinforced with steel fibers and polypropylene fibers, and subjected to the vertical and horizontal loads were constructed and tested. The results showed that performance in terms of load carrying capacities, stiffness, ductility, crack width, and number of cracks was improved, as the steel fibers and polypropylene fibers were added. The polypropylene fiber reinforced concrete corbels resulted in higher ductility in presence of horizontal loads, but showed larger crack width than the steel fiber reinforced concrete corbels. And, the heads of the headed bars provided excellent end anchorage of the main tension tie reinforcement. Experimental results presented in this paper are also compared with various prediction models proposed by codes and researchers. The refined strut-and-tie model showed more accurate and conservative predictions in presence of horizontal loads, and the truss model proposed by Fattuhi provides fairly good predictions for fiber reinforced concrete corbels.
|