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Title |
A Study on Shear Capacity and Behavior of Large Sized Concrete Anchorage System
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Keywords |
대형앵커시스템 ; 거동특성 ; 전단성능 ; CCD 방법 Large sized anchorage system ; Behavior ; Shear strength ; CCD method |
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Abstract |
In this study, 24 prototype specimens were tested to find out the shear behavior and strength of large anchorage system exceeding 50mm(2") in anchor bolt diameter(do) and 635mm(25") in effective embedment depth(hef) not addressed by ACI349-06 Appendix B. Test variables are anchor bolt diameter(do= 63.5, 76.2, 88.9mm), effective embedment depth(hef=635, 762mm), and edge distance(c1=381, 508, 762mm). Concrete compressive strength is constant(fck=38MPa). Test results (Vtest) were overestimated by Vaci06(shear strength by ACI 349-06) and Vccd(shear strength by CCD method). In large anchorage system exceeding 50mm(2") of anchor bolt diameter(do) and 635mm(25") of anchor bolt effective embedment depth(hef), the bolt diameter variation and effective embedment depth(hef) has no influence on the shear strenth, But, according to the analysis results of the feature ratio on edge distance(c1) and anchor bolt diameter, the feature ratio become smaller, which means anchor bolt diameter is bigger, predicted ratio of test results and predicted equation is larger. It was found that anchor bolt diameter is immediate cause of deterioration in the shear capacity of large anchorage system. To improve and extend the validity of current design recommendations further theoretical and numerical work is needed.
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