CAJ | 학술논문

根据弯曲和拉伸组合作用下的单根纤维的受力状态，提出了细观变位约束模型以求解承受轴拉的随机各向分布纤维增强混凝土的力学性能。将单根随机纤维的理论解在三维空间进行积分运算，有效描述了受拉纤维混凝土开裂后的受力过程，并给出了复合材料拉伸应力与裂纹张开位移、纤维倾斜角的函数关系，绘制的合成纤维混凝土曲线与试验结果有较好的一致性。
근거만곡화랍신조합작용하적단근섬유적수력상태，제출료세관변위약속모형이구해승수축랍적수궤각향분포섬유증강혼응토적역학성능。장단근수궤섬유적이론해재삼유공간진행적분운산，유효묘술료수랍섬유혼응토개렬후적수력과정，병급출료복합재료랍신응력여렬문장개위이、섬유경사각적함수관계，회제적합성섬유혼응토곡선여시험결과유교호적일치성。
According to the forced state of single randomly oriented fiber under the combined action of bending and stretching, using the meso-scale variable engagement model to get the mechanical properties of the fiber reinforced con-crete under tensile loading is put forward. Meanwhile, the obtained theory value of the single fiber is done the integral on 3-D space, the forced state of the fiber concrete under tensile stress after cracking is discussed. And the functional rela-tionship of tensile stress and crack opening displacement of the fiber concrete as well as inclined angle of fiber is de-scribed. The analytical results show that the model can preliminarily simulate the elastic pullout behaviour of inclined syn-thetic crack-bridging fiber, and the curve is consistent with the experimental result.