摘要
构件刚度的变化可以较全面地反映构件的整体力学性能。本文以碳纤维加固规范及国内外相关理论研究成果为依据,结合试验研究,通过理论分析的方法,研究了碳纤维布加固损伤钢筋混凝土吊车梁抗弯刚度及在疲劳荷载作用下,构件在整个寿命周期内刚度随时间的变化情况。对比分析数据与试验数据发现:构件刚度的损伤发展有明显的三阶段变形规律;本文理论计算得到的数据与试验数据吻合较好,说明本文给出的关于CFRP加固损伤钢筋混凝土梁的疲劳刚度的理论计算方法可以满足工程设计对精度的要求。
The change of the beam＇s stiffness can reflect the behavior of the beam. Based on the technical specification for strengthening structures with CFRP and other related studies and tests, the flexural stiffness of the damaged crane beam were calculated, and the change of the stiffness during the fatigue cycle were analyzed as the parameter of cycle time. By comparing the analytical results with the experimental results, we can conclude that the damage curve of the beam follows the threephase distortion, and the analytical method is valid when it is used to compute the flexural stiffness of common RC beams and beams strengthened by CFRP.
出处
《实验力学》
CSCD
北大核心
2007年第5期472-476,共5页
Journal of Experimental Mechanics
基金
江苏省自然科学基金资助项目(BK2004064)
江苏省博士后基金(070100813)
关键词
结构加固
刚度
疲劳刚度
碳纤维布
structure strengthen
stiffness
fatigue stiffness
CFRP
