• 콘크리트학회논문집
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• 제26권1호
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• pp.79-86
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• 2014

이 연구는 표면매입 보강된 FRP 판과 콘크리트사이의 응력전달기구를 이론적으로 연구한 것으로서 이선형 부착모델을 이용하여 부착거동을 묘사하고 이를 실험 결과와 비교하여 신뢰성있는 해석방법을 제시하였다. 연구로부터, 표면매입된 FRP 판과 콘크리트사이의 계면특성을 고려한 미분방정식에 이선형 부착-미끄러짐 관계곡선을 사용하여 해석할 경우, 모델의 임계값인 최대전단강도와 미끄러짐 변위, 그리고 박락에 의한 연화거동이 시작될 때의 변위값 선정과정이 제시되었다. 또한 제안된 모델을 사용하여 부착길이가 다르게 보강된 표면매입 FRP 판의 미끄러짐 거동을 해석한 결과 실제 거동을 매우 근사하게 묘사할 수 있는 것으로 나타났다.

• Geomechanics and Engineering
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• 제14권3호
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• pp.233-240
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• 2018

Pullout tests are usually employed to determine the ultimate bearing capacity of reinforced soil, and the load-displacement curve can be obtained easily. This paper presents an analytical solution for predicting the full-range mechanical behavior of a buried planar reinforcement subjected to pullout based on a bi-linear bond-slip model. The full-range behavior consists of three consecutive stages: elastic stage, elastic-plastic stage and debonding stage. For each stage, closed-form solutions for the load-displacement relationship, the interfacial slip distribution, the interfacial shear stress distribution and the axial stress distribution along the planar reinforcement were derived. The ultimate load and the effective bond length were also obtained. Then the analytical model was calibrated and validated against three pullout experimental tests. The predicted load-displacement curves as well as the internal displacement distribution are in closed agreement with test results. Moreover, a parametric study on the effect of anchorage length, reinforcement axial stiffness, interfacial shear stiffness and interfacial shear strength is also presented, providing insights into the pullout behaviour of planar reinforcements of MSE structures.