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http://dx.doi.org/10.22645/udi.2018.12.30.021

Anchorage performance tests of SD700 hooked bar and headed bar with a anchorage length of 20db  

Kim, Ho Young (영남대학교 건설시스템공학과)
Sim, Hye Jung (인천대학교 도시과학대학 건축학과)
Publication Information
Journal of Urban Science / v.7, no.2, 2018 , pp. 21-27 More about this Journal
Abstract
With the increase of the skyscraper center, the development of large-diameter and high-strength reinforcing bars is being carried out to solve the dense reinforcement. In case of the steel reinforced concrete with a small cross section such as beam-column joints, the development length becomes short when straight bars are used. Therefore, it is possible to solve the problem that the development length becomes short by using the bearing strength of the hooked bar and headed bar. In this study, the exterior beam-column joint test of SD700 hooked bar and headed bar with anchorage length of 20db was conducted to extend the development length limitation of hooked bar and headed bar. As a result of the evaluation of the anchorage strength using the design equation by KCI, the average of the [measured value]/[predicted value] ratio was 1.31 for the hooked reinforcing bars. In the case of headed bars, the average of the [measured value]/[predicted value] ratio was 1.12. In addition, in order to compare the anchorage performance of the hooked bar and the headed bar, the measured values were divided by the square root of the compressive strength of the concrete to compare the anchorage strength. Under the same conditions, the anchorage strength of headed bars was 8.5% higher than the hooked bars.
Keywords
Exterior beam-column joint; Hooked bar; Headed bar; Development length;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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