碳纤维加固钢筋砼柱承载力的影响因素研究  

INFLUENCING FACTOR ANALYSIS OF THE BEARING CAPACITY OF CFRP REINFORCED CONCRETE COLUMN

作　　者：朱成九[1] 朱爱华[1] 卜少磊 

机构地区：[1]华东交通大学,江西南昌330013 [2]茂尔盛咨询(深圳)有限公司,广东深圳518001

出　　处：《玻璃钢／复合材料》2010年第5期3-6,共4页Fiber Reinforced Plastics/Composites

基　　金：江西省教育厅资助项目(赣教技字[2005]129字)

摘　　要：利用试验数据验证,建立一个有效、精确的有限元模型,使用ANSYS软件计算CFRP加固间距、层数、柱的截面尺寸及长细比的变化对碳纤维加固钢筋砼柱极限承载力的影响。结果表明,在加固层数相同时,柱的承载力随加固间距的增大而减小;应力随着CFRP布层数的增多而提高,CFRP加固层数较少时应力提高幅度相对较大,其极限加固层数为5层,超过此层数则CFRP利用率将变小;在短柱的范围内,CFRP加固后混凝土柱的最大轴向应力的计算结果十分相近,并不随着柱长细比的增加而变化较大;柱尺寸的变化对CFRP约束效果的影响较明显,约束后混凝土柱的承载力提高幅度随着尺寸的增大而减小。It calculates the strengthen space,layer number,column sectional dimension,and the influence of slenderness ratio variation on ultimate bearing capacity of CFRP reinforced concrete column,by building an effective and accurate finite element model.Experimental data verifies that bearing capacity gets smaller with the increase of the strengthen space with equivalent strengthen layers,and that stress increases with the increase of the CFRP distribution layers.Stress increase margin is relatively large while CFRP strengthen layer is less than 5;conversely the utilization rate of CFRP decreases.As for short columns,there is no significant difference in computing results of the maximum axis centripetal force,which does not change greatly with the increase of the slenderness ratio.Influence of the column size variation on CFRP binding effect is remarkable,for the bound bearing capacity increase margin of concrete column decreases as the size increases.

关 键 词：CFRP 钢筋砼柱 承载力 影响因素 

分 类 号：TU375.1[建筑科学—结构工程]