FRP-混凝土组合桥面板单调静力性能的试验研究  

Monotonic Loading Experiment Analysis of FRP-concrete Composite Bridge Decks

作　　者：古徐莉[1] 薛伟辰[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《华北水利水电学院学报》2012年第6期78-82,共5页North China Institute of Water Conservancy and Hydroelectric Power

基　　金：国家"973"计划项目(2012CB026200);交通部西部交通建设科技项目(200631882244)

摘　　要：采用抗剪连接件将FRP板与混凝土板连接起来共同承担外部荷载,即形成了FRP-混凝土组合桥面板.开展了采用FRP开孔板连接件和环氧树脂2种方式连接的FRP-混凝土组合桥面板的单调静力性能试验,重点对其破坏形态、承载力、变形、滑移等进行研究.研究结果表明:组合桥面板的破坏均以FRP板与混凝土板的连接界面破坏为标志;采用FRP开孔板连接件连接的组合桥面板,在FRP板与混凝土板界面处的滑移增量随荷载增大逐渐加大,最大滑移量为0.55 mm,而采用环氧树脂连接的组合板在整个加载过程几乎没有滑移;采用环氧树脂连接的桥面板比采用FRP开孔板连接件连接的桥面板的抗弯承载力高22%,极限跨中挠度比后者小13.4%,这主要是由于FRP开孔板连接件滑移较大所致.FRP-conerete composite bridge deck is the one which connects FRP slab and concrete slab together by shear connectors to bear the external loads. A FRP-eoncrete composite bridge deck with FRP perfobond shear connector and a FRP-concrete composite bridge deck bonded with epoxy resin are loaded monotonously in the experiment, the failure pattern, bearing capacity, deformation and slip are mainly studied. The results show that the damage of the connection interface marks the failure of the two FRP-concrete compos- ite bridge deck specimens; the interface slip increment of the specimen with FRP perfobond shear connector increases gradually with the increasing loads, and the maximum of the slip i： 9.55 ram, on the contrary, the specimen bonded with epoxy resin almost has no slip in the whole loading process; comparing to the specimen with FRP perfobond shear connector, bearing capacity of the specimen bonded with epoxy resin is 22% larger, and the limit deflection is 13.4% smaller, which are resulted from the interface slip of FRP perfobond shear connector.

关 键 词：FRP-混凝土组合桥面板 单调静力性能 试验 抗弯承载力 滑移 变形 

分 类 号：TU377[建筑科学—结构工程]