铁道科学与工程学报2017，Vol.14Issue(5)：1011-1018,8.
预应力混凝土梁长期变形表征参数研究
Study on long-term deformation characterization parameters of prestressed concrete beam
摘要
Abstract
In order to establish long-term deflection calculation model of prestressed concrete beam, it is necessary to clarify numerical relationship among long-term deformation characterization parameters, such as long-term deflection coefficient, creep deflection coefficient, and creep coefficient. Through experimental study combined with FEM analysis on long-term deformation of four prestressed concrete beams with span 7.5 m, the fundamental difference and numerical relationship among long-term deformation characterization parameters were studied. The results show that long-term deflection coefficient is not equal to creep coefficient but 1.1 times the creep deflection coefficient; and the numerical relationship between creep coefficient and creep deflection coefficient is effected by Partial Prestressing Ratios, thus for full-prestressed concrete beams, creep coefficient is less than creep deflection coefficient, while creep coefficient is more than creep deflection coefficient for partial-prestressed beams; Finally, an expression of numerical relationship between long-term deflection coefficient and creep coefficient was built.关键词
预应力混凝土梁/长期变形表征参数/长期挠度系数/徐变挠度系数/徐变系数Key words
prestressed concrete beams/long-term deformation characterization parameters/long-term deflection coefficient/creep deflection coefficient/creep coefficient分类
建筑与水利引用本文复制引用
王俊,黄春水,苏聪聪..预应力混凝土梁长期变形表征参数研究[J].铁道科学与工程学报,2017,14(5):1011-1018,8.基金项目
中国博士后科学基金资助项目(2014M562000) （2014M562000）
河南省高等学校青年骨干教师资助项目(2014GGJS-116) （2014GGJS-116）
河南省高等学校重点资助项目(15A560009) （15A560009）
