2016年5月下 施工技术 第45卷第10期 CONSTRUCTION TECHNOLOGY 69 D0I:10.7672/8js2016100069 基于徐变效应预应力CFRP布加固组合梁变形分析 霍君华 (辽宁省交通高等专科学校道路与桥梁工程系，辽宁沈阳110122) [摘要]在腐蚀钢与混凝土组合梁受拉区粘贴CFRP布进行加周并对其加固后的徐变效应进行研究.研究了徐变 效应对组合梁变形能力的影响，给出徐变函数数学模型，建立预应力CFRP布加固钢与混凝土组合梁徐变效应分 析模型，研究了组合梁在徐变效应影响下的变形性能.计算结果表明，沿梁长范围内，跨中截面处的变形最大，在 荷载作用后的初始阶段，跨中变形有明显变化，之后各参数值随着时间的增长趋于一定值；跨中变形的增加量随混 凝土强度、预拉力、梁截面宽度、腹板高度的增大而减小. [关键词]加固：CFRP布；钢与混凝土组合梁；徐变效应；变形 [中图分类号]TU502*.6:TU746.3 [文献标识码]A [文章编号]1002-8498(2016)10-0069-04 The Deformation Analysis of Prestressed CFRP Sheets Strengthening Steel-concrete Composite Girders Under the Creep Huo Junhua Department of Road Bridge Liaoning Provincial College of Communications Shenyang Liaoning 110122 China) Abstract:The behavior of damaged steel-concrete posite girders repaired with CFRP sheets under creep was studied.The deformation model of creep function was developed then some analytic models based on visco-elasticity theory were given to the putation procedure of ereep effect such as the deformation.The calculation results along the whole span showed that the values of mid-span deformation are maximum.During the initial stage of loading the values of all these parameters change obviously and later on they approach to constant.The increment of mid-span deformation decreases with the increasing of the concrete strength the prestressing the beam section width and the height of web. Key words:strengthening;CFRP sheets;steel-concrete posite girders;creep effect;deformation 混凝土徐变是指在持续荷载作用...
基于徐变效应预应力CFRP布加固组合梁变形分析.pdf
