FRP-混凝土组合桥面板疲劳性能试验研究  

EXPERIMENTAL STUDY ON THE FATIGUE BEHAVIOR OF FRP-CONCRETE COMPOSITE DECKS

作　　者：杨勇[1,2] 刘玉擎[3] 范海丰[3] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]华侨大学土木工程学院,福建泉州362021 [3]同济大学桥梁工程系,上海200092

出　　处：《工程力学》2011年第6期66-73,共8页Engineering Mechanics

基　　金：国家"863"科技计划项目(2006AA11Z103);国家自然科学基金项目(50978109)

摘　　要：在静力试验研究基础上,对一新型FRP-混凝土组合桥面板试件进行了高周疲劳试验研究,在疲劳试验各主要时刻停机进行了静载试验研究。疲劳试验研究主要考察了组合桥面板在疲劳循环荷载下组合板刚度、底板FRP应变、混凝土应变以及裂缝形态等受力行为发展过程,并采用光纤位移传感器对疲劳试验过程中组合板试件的最大动挠度、最小动挠度及各主要时刻停机后组合板残余挠度等动力响应进行了精确测量。疲劳试验研究结果表明,该文所研究的FRP-混凝土组合桥面板试件在经历310万次疲劳循环加载后无明显刚度和强度退化,具有良好抗疲劳性能。试验测量结果表明,该文所采用的光纤位移传感器测试技术测量效果较好,适用于疲劳荷载下试件动态挠度和残余挠度的精确适时测量。Fatigue experiment of one specimen of a new type FRP-concrete composite deck was conducted to study its fatigue behaviors,and during the fatigue experiment a series of static experiments at key time point were also conducted.During fatigue experiment process,the failure modes,the deflection and developing process of concrete strains,steel plate strains,cracking as well as slippage of interface of the composite decks were all studied in detail.Especially,the dynamical response including maximum deflection,minimum deflection and remnant deflection of this specimen were accurately measured with an optical fiber deformation transducer.From the experimental study,the flexural rigidity and bearing-capacity of the specimen didn＇t decreased significantly after undergone 3.1 million load cycles,from which it could be found that this type composite deck could behave well under fatigue load environment.it were also verified that the optical fiber deformation transducer measuring system could be used in accurately measuring dynamical deflections of bridge decks and bridge girders both in the laboratory and in the situ.

关 键 词：FRP-混凝土组合桥面板 疲劳性能 疲劳试验 动态挠度 光纤传感位移计 

分 类 号：TU398[建筑科学—结构工程]