CFRP复合材料加固钢筋混凝土柱偏心受压性能尺寸效应的试验

碳纤维增强树脂（CFRP）复合材料是一种具有轻质、高强和抗腐蚀等优点的新型高性能材料，为了研究尺寸效应对CFRP复合材料布加固钢筋混凝土柱偏心受压性能的影响，本文进行了相关的试验研究。试验共制作了15根尺寸成比例的钢筋混凝土柱试件，试验考虑了构件尺寸、偏心距和CFRP复合材料布加固层数三种因素的影响。试验结果表明:CFRP复合材料布加固钢筋混凝土柱的破坏形态、相对挠度、CFRP复合材料布峰值应变、钢筋峰值应变都存在明显的尺寸效应； CFRP复合材料布加固钢筋混凝土柱的极限荷载随偏心距的增大而减少，尺寸越大，减小趋势越平缓；在相同偏心距下，随着CFRP复合材料布加固钢筋混凝土柱试件截面尺寸的增加，安全储备系数逐渐减小。 

Experimental study on size effect of reinforced concrete columns strengthened with CFRP composite under eccentric loads

Carbon fiber reinforced polymer (CFRP) composite is a new high-performance material with the advantages of light weight, high strength and corrosion resistance. This paper presents the results of experimental studied on the size effect of the eccentric compressive performance of reinforced concrete columns strengthened with CFRP composite sheets. A total of fifteen reinforced concrete columns were designed and tested up to failure under eccentric compressive loads, the columns were geometrically similar to one another. Three factors were taken into consideration in this study, such as the size of column, eccentricity and the layers of CFRP composite sheets. The test results indicate that the failure modes, the relative deflection, the peak strains of CFRP composite and steels are obviously affected by the size of columns. The ultimate load of reinforced concrete columns strengthened with CFRP composite sheets significantly decreases with the eccentricity increases, and the rate of decrease gradually becomes slower with the size increasing. Under the same eccentricity, the safety storage coefficient of reinforced concrete columns strengthened with CFRP composite gradually decreases with the increase of the size.