CFRP-PCPs筋内嵌加固混凝土梁抗弯刚度及截面内力分析

CHARACTERISTICS AND CALCULATION METHODS OF CONCRETE BEAM STRENGTHENED WITH INMOUNTED CFRP-PCPs

进行了8根CFRP-PCPs复合筋内嵌加固混凝土梁的加载试验研究。结果表明,与预应力CFRP材料的其他加固方式相比,采用预应力CFRP-PCPs筋内嵌加固混凝土梁可有效提高加固梁的刚度。依据试验荷载-挠度关系曲线,建立了三直线弯矩-曲率关系模型,并推导出了CFRP-PCPs筋内嵌加固混凝土梁短期刚度与挠度计算公式,将计算值与试验值进行对比,吻合度良好。

Experimental studies on eight reinforced concrete beams strengthened with near-surface mounted（ NSM） CFRP-PCPs reinforcement have been tested with load. Comparing with plastering CFRP to strengthen prestressed,the technique to strengthen concrete beams with near-surface mounted CFRP-PCPs reinforcement has specialties as rigidity. In addition,according to the test load-deflection relation curves,under the the identified trilinear moment-curvature model,deducing the CFRP-PCPs reinforcement embedded in reinforced concrete beam deflection calculation formula,the calculated value was compared with the test results,and the results match well.