摘要
FRP(fiber reinforced plastic)材料因其强度高,质量轻,施工方便等优势在土木工程加固领域内的应用越来越广。但是由于FRP材料极限受拉应变低、应力应变关系为线弹性等特点,使得其与钢筋混凝土材料共同工作时强度往往得不到充分发挥;而且极易出现脆性破坏,大大降低了构件的延性。结合作者在邦戈邦都大桥加固方案中所做的实验,着重从破坏类型和构件延性方面说明实验结果。主要从传统的位移延性系数和耗能延性系数,以及一种新的综合性能指标来定性分析和评价CFRP外包加固钢筋混凝土桥面板的延性性能。
By the advantadges of high strength, light weight, and convenient construction, the FRP is applied to a large number of engineering projects. Yet, the low Ultimate tensile strain and the complete linear elastic stress- strain relationship of FRP make it unable to give a full play to strength while working with RC materials. The failure modes and the ductility of FRP basing on the experiment of reinforcement project of Bongo bridge are analyzed. The essay evaluates the ductility of the CFRP reinforced bridge deck by calculating the traditional displacement ductility index , the energy ductility index and a new comprehensive performance index.
出处
《科学技术与工程》
北大核心
2013年第14期4120-4124,共5页
Science Technology and Engineering
关键词
CFRP
荷载-变形曲线
位移延性系数
耗能延性系数
综合性能指标
CFRP load-displacement curve comprehensive performance indexdisplacement ductility indexenergy ductility index
