高性能混凝土与钢筋及纤维组合体长期变形试验研究  

Long-term Deformation Test Study on the Composite of HPC,Reinforcement and Fiber

作　　者：黄卫兰[1] 陈程 陈灿明[1] 陆采荣[1] 唐崇钊[1] 

机构地区：[1]南京水利科学研究院水利部水科学与水工程重点实验室,江苏南京210029 [2]江苏省苏科建设技术发展有限公司,江苏南京210008

出　　处：《公路工程》2013年第2期210-213,共4页Highway Engineering

摘　　要：以五河口特大桥主梁C60混凝土为对象,研究了高性能混凝土龄期及掺聚酯纤维和内置钢筋对长期变形的影响。试验结果表明,研制的C60混凝土早期强度和弹模较高、徐变度相对较低,可有效减小结构的预应力损失和桥梁的长期变形;试件内置钢筋和掺入纤维后组合体变形特征符合线性分析原理。The C60 concrete of Wuhekou Grand Bridge girder is the object of study. The effect of HPC age, mixed polyester fibers and built-in reinforcements on long-term deformation is studied. The test results show ： The early strength and Young＇ s modulus of developed C60 concrete are higher and its spe- cific creep lower, and it can effectively reduces the structural prestress loss and the bridge＇ s long-term deformation; After placing the built-in reinforcements and mixing the fibers in the test specimens, the composite＇ s deformation characteristics are accordant with the principle of linear analysis.

关 键 词：混凝土 徐变 掺纤维 内置钢筋 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]