塑性铰区采用FRC柱试验研究及正截面承载力分析

采用简化的纤维增强混凝土应力应变关系，根据截面变形的平截面假定和截面力的平衡方程，推导出塑性铰区采用纤维增强混凝土柱在不同极限状态时的曲率。根据各极限状态点曲率，求得截面上各分布力，对截面形心轴取距，到塑性铰区采用FRC柱的开裂、屈服、峰值和极限点的弯矩表达式。与试验结果对比表明，计算值与试验值吻合较好。

Experimental analysis of normal section bearing capacity for reinforced concrete columns with fiber reinforced concrete in plastic hinge region

Based on simplified stress-strain relationship of fiber reinforced concrete and the plane section assumption and equilibrium equation, the curvature of reinforced concrete columns with fiber reinforced concrete in plastic hinge region under different ultimate state was derived. Then, the distribution force in the cross section was obtained by calculating the curvature under different ultimate states. By taking the distance of the cross section centroid axis, the moment expressions of reinforced concrete columns with fiber reinforced concrete in plastic hinge region at crack load point, yield load point, peak load point and ultimate load point were attained. The calculated values agree well with the experimental results.