在役桥梁预应力混杂纤维布加固后静载试验研究  

Research on the Static Load Tests of a Bridge in Service after Strengthening with Pre-stressed C/GFRP Sheets

作　　者：蔡晨宁[1] 欧世坤[1] 杨杰[1] 闫维明[2] 艾军[1] 

机构地区：[1]南京航空航天大学土木工程系,江苏南京210016 [2]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《新技术新工艺》2015年第5期96-100,共5页New Technology & New Process

基　　金：北京工业大学工程抗震与结构诊治北京市重点实验室开放项目;江苏省交通科学研究计划资助项目(2012Y10)

摘　　要：预应力混杂CFRP/GFRP纤维布加固是一种新型的主动预应力加固技术,为深入研究加固效果,结合某既有桥梁加固工程,在其空心板底面采用预应力混杂CFRP/GFRP纤维布加固,并进行了加固前后的静载对比试验研究。结果表明,采用该加固方法可显著降低空心板应力,增加抗弯刚度,有效抑制混凝土开裂。Using pre-stressed C/GFRP sheets to strengthen structure is an initiative prestressed reinforcement technology. To make an intensive study of the effect of reinforcement, an aging hollow slab bridge is strengthened with pre-stressed C/GFRP sheets, and a research on comparison of the static load tests before and after strengthening is done. The results show that this technology could effectively reduce stress of the hollow slabs and improve the bear capacity. The cracking of concrete can be restrained.

关 键 词：预应力 混杂纤维布 桥梁加固 静载试验 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]