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Design Considerations and Pull-Out Behavior of Mechanical Anchor of Reinforcement
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 Title & Authors
Design Considerations and Pull-Out Behavior of Mechanical Anchor of Reinforcement
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 Abstract
In RC structure, sufficient anchorage of reinforcement is necessary for the member to produce the full strength. Generally, conventional standard hook is used for the reinforcement's anchorage. However, the use of standard hook results in steel congestion, making fabrication and construction difficult. Mechanical anchor offers a potential solution to these problems and may also ease fabrication, construction and concrete placement. In this paper, the required characteristics and the design considerations of mechanical anchor were studied. Also, the mechanical anchor was designed according to the requirements. To investigate the pull-out behavior and properness of mechanical anchorage, pull-out tests were performed. The parameters of tests were embedment length, diameter of reinforcement, concrete compressive strength, and spacing of reinforcements. The strengths of mechanical anchor were consistent with the predictions by CCD method. The slip between mechanical anchor and concrete could be controlled under 0.2mm. Therefore, the mechanical anchor with adequate embedment could be used for reinforcement's anchorage. However, it was observed that the strength of mechanical anchors with short spacing of reinforcements was greatly reduced. To apply the mechanical anchor in practice (e.g. anchorage of the beams reinforcements in beam-column joint), other effects that affect the mechanical anchor mechanism, such as confinement effect of adjacent member from frame action or effects of shear reinforcement, should be considered.
 Keywords
mechanical anchor;pull-out test;anchorage;CCD method;CCD;
 Language
Korean
 Cited by
1.
철근콘크리트 기둥에서 반복횡력에 대한 헤드형 횡보강근의 구속효과에 대한 실험연구,서수연;함주호;

한국구조물진단유지관리공학회 논문집, 2012. vol.16. 5, pp.1-10 crossref(new window)
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