Shear friction stress-slip relationship of masonry element interfaces of concrete brick and mortar was experimentally evaluated and generalized on the basis of the Coulomb failure criteria and test results. The main parameters investigated were the compressive strength of mortars and applied normal stresses in compression. The shear friction stress-slip curve of masonry elements was insignificantly affected by the compressive strength of mortars, whereas the shear friction strength and slip amount at the peak strength tended to increase with the increase in the applied compressive stresses. From the measured shear friction strength, the cohesion and friction angle at the interfaces of masonry elements could be fitted at 0.5 MPa and 31.4°, respectively. The proposed model exhibited a reasonable agreement with test results; as a result, it has great potential to be applied as a fundamental reference for nonlinear finite element analysis to assess the structural performance of masonry walls.
조적요소에서 콘크리트 벽돌과 모르타르 경계면에서 전단마찰 응력-미끄러짐 관계를 실험적으로 평가하고 이에 기반 하여 모델을 제시하였다. 주요 실험변수는 모르타르 압축강도와 작용 압축응력이다. 실험결과 조적 요소의 전단마찰 응력-미끄러짐 관계에 대한 모르타르 압축강도의 영향은 미미한 반면 조적 요소의 전단마찰 내력 및 최대 전단마찰 응력 시 미끄러짐 양은 작용 압축응력에 비례하여 증가하는 경향을 보였다. 실험결과로부터 콘크리트 벽돌과 모르타르 경계면에서 점착력은 약 0.5 MPa, 마찰각은 약 31.4°로 제시될 수 있었다. 제안된 전단마찰 응력-미끄러짐 관계 모델은 조적요소의 전단마찰 거동을 비교적 잘 모사함으로서 조적벽체의 비선형 유한요소 해석 등의 기초 자료로 활용할 수 있을 것으로 기대된다.
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- Publisher :Korea Concrete Institute
- Publisher(Ko) :한국콘크리트학회
- Journal Title :Journal of the Korea Concrete Institute
- Journal Title(Ko) :콘크리트학회 논문집
- Volume : 31
- No :1
- Pages :21-27