HFRP约束长龄期混凝土柱轴压性能的试验研究  

Experimental Study on Mechanical Property of Long-age Concrete Columns Confined by HFRP Under Axial Compression

作　　者：邓宗才[1] 阚德新[1] 王力[1] 李建辉[1] 

机构地区：[1]北京工业大学城市与工程防灾减灾省部共建教育部重点实验室,北京100124

出　　处：《北京工业大学学报》2011年第9期1367-1371,共5页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(50678011)

摘　　要：为了研究龄期和混杂纤维布种类对加固混凝土柱抗压性能的影响规律,对碳、芳纶、玻璃、玄武岩和聚乙烯纤维层间混杂HFRP(hybrid fiber reinforced polymer)布约束长龄期混凝土柱的破坏形态、承载力和变形性能进行了试验.结果表明:1)当养护龄期均为2 a(或者3 a)时,大部分HFRP布约束混凝土柱抗压强度比未约束混凝土柱提高1.19～1.83倍,HFRP约束可以显著提高长龄期混凝土柱的抗压承载力;2)对于约束混凝土柱,当养护龄期超过28 d后,继续进行自然养护对其承载力的影响较小;3)当养护龄期均为2 a(或者3 a)时,HFRP布可以显著改善长龄期混凝土柱的变形性能,变形延性系数提高0.8～3.5倍.In order to study the effects of natural curing ages and types of fiber reinforced plastic on the compressive behaviore of concrete, the mechanical properties of long-age concrete columns confined by laminated hybrid fiber sheets, which made by carbon fiber, aramid fiber, glass fiber, basalt fiber and polyethylene fibers, under axial compression were researched experimentally in this paper, failure configuration, bearing capacity and deformation behavior were all studied. The results show that when curing ages are 2 a （or 3 a） , HFRP sheets significantly increase the bearing capacity of long-age concrete columns, which compressive strengths are increased by 1.19 - 1.83 times. The natural curing age has little effect on the bearing capacity of concrete columns confined by HFRP after 28 d. And when curing ages are 2 a （or 3 a）, HFRP sheets significantly improve the deformation behavior of long-age concrete columns, the displacement ductility indices are increased by 0. 8 - 3.5 times.

关 键 词：FRP纤维增强聚合物 混杂 长龄期 混凝土 单轴压缩 

分 类 号：TU375.3[建筑科学—结构工程]