FRP-圆钢管混凝土柱受剪性能试验研究  

Experimental study on shear resistance performance of concrete filled circular FRP-steel tube columns

作　　者：李杉[1] 卢亦焱[1] 李娜[1] 黄银燊[1] 李晓瑾[1] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《建筑结构学报》2012年第11期107-114,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(50678136);湖北省青年杰出人才基金项目(2004ABB014)

摘　　要：通过12根FRP-圆钢管混凝土试件和1根圆钢管混凝土对比试件的抗剪试验,研究环向包裹FRP布时圆钢管混凝土柱的受剪性能,分析了剪跨比、轴压比、含钢率、混凝土强度、FRP布层数等对FRP-圆钢管混凝土柱受剪性能的影响。研究结果表明,从开始加载至FRP布断裂,FRP布和钢管保持协同工作,FRP-圆钢管混凝土柱具有良好的变形能力。剪跨比和含钢率显著影响FRP-圆钢管混凝土柱的受剪承载力,FRP-圆钢管混凝土柱受剪承载力随剪跨比的增大而减小,随含钢率的增大而增大。增加FRP布层数、提高混凝土强度和增大轴压比均可小幅度提高FRP-圆钢管混凝土柱的受剪承载力。在试验研究的基础上,提出了FRP-圆钢管混凝土柱受剪承载力计算式,得出的计算结果与试验结果吻合较好。A total of 12 concrete filled circular FRP-steel tube （CFFST） columns and 1 concrete filled circular steel tube （CFST） columns were tested under shear load. The effects of shear span ratio, axial-compression ratio, steel ratio, concrete strength, layers of FRP sheet on the shear resistance performance of CFFST columns were investigated. The results indicate that the steel tube and FRP sheet can work together circumferentially. CFFST columns have good deformation capacity. With the shear span ratio increasing, CFFST columns show a significant decreasing trend in shear capacity. With the steel ratio increasing, CFFST columns show a significant increasing trend in shear capacity. With the increasing of FRP sheet layers, concrete strength and axial-compression ratio, CFFST columns have a small increase in shear capacity. Based on the results, a formula was proposed to calculate the shear capacity of CFFST columns. The calculated results have a good agreement with experimental results.

关 键 词：纤维增强聚合物(FRP) 圆钢管混凝土柱 静力试验 受剪承载力 

分 类 号：TU398.9[建筑科学—结构工程]