碳纤维布结合体外预应力筋加固桥梁的试验及应用  

Experiment and Application of Bridge Strengthened with CFRP and External Pre-Stress Steel

作　　者：陆伟[1] 刘幸[1] 张迷迷[2] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072 [2]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2007年第4期59-64,共6页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：教育部博士点基金资助项目(20050491004)

摘　　要：开展了7片T梁的碳纤维布加固、体外预应力筋加固、二者结合加固(国内首次)的对比试验,结果表明二者结合加固的方法能更大程度地提高构件承载力、减小挠度,在加载过程中碳纤维布和体外预应力筋先后发挥作用.通过312国道信阳公跨铁立交桥加固工程的实例分析可以看出,二者结合加固能有效降低旧桥主拉应力、减小裂缝宽度.图23,表3,参8.The text was carried out comparative experiment to apply various methods to strength seven T girders,which are CFRP, external pre-stress steel and their combination method,the result showed that the combination method improve the bearing capacity and reduce the deflection in some degree. During the loading, CFRP play the role first,then the external pre-stress steel. It also draws that the combination method can reduce principal tensile stress and width of the crack through the engineering practice： a cloverleaf junction on the 312 national highway in Xinyang. 23 figs., 3tabs., 8refs.

关 键 词：碳纤维布 体外预应力筋 桥梁加固 

分 类 号：TU378.8[建筑科学—结构工程]