中文摘要：

在考虑不同的裂缝发展情况下曲率沿梁长度方向实际变化的基础上，提出采用“力矩面积法”计算FRP筋混凝土梁的挠度，给出了力矩面积第一定理及力矩面积第二定理的定义，绘制了荷载～挠度曲线。该方法克服了积分法与叠加法的不足，具有概念清楚、计算简单的特点。进行了6根GFRP筋混凝土简支梁的单调试验，将试验结果与计算结果进行对比，表明极限挠度值的计算结果与试验结果最大误差在10％以内，吻合良好。

英文摘要：

Based on the consideration of actual change of curvature along the length of a beam under different crack development conditions, it was put forward to employ the moment-area method to calculate deflection of concrete beams with FRP bars. The definitions of the first and the second theorems of the moment area were proposed. The load-deflection curves were depicted. The proposed method overcame the deficiencies of the integration method and the superposition method and was of the advantages of clear concept and simple calculation. Monotonic loading tests on 6 concrete beams with FRP bars were carried out. A comparison between the test and calculated results shows that the maximum error of the hmit deflection is smaller than 10%, and they exhibit good agreement.