摘要
采用文献中的FRP-混凝土粘结单剪试验的232组试验数据对5个界面粘结强度模型及相应的界面断裂能进行了简化的统计评估;对其中的Dai模型界面断裂能及粘结强度模型进行了修正和重新评估,修正后的模型可以用来较准确地估算界面断裂能及界面粘结强度。6个模型预测界面粘结强度模型计算分析表明:理论与试验值都有较好的线性相关性,但也有一定的分散性;基于非线性断裂力学的界面断裂能可以作为评估粘结强度模型是否合理的一个辅助手段。
Two hundred and thirty two groups of experimental results from published single-lap shear test specimens were used to evaluate the interface fracture energy and bond strength of FRP/concrete bond system.The five existing analytical models were evaluated by means of simplified statistical analysis. The model proposed by Dai was modified and reevaluated, which can predict the interface fracture energy and bond strength accurately. Analysis and calculation show that the six analytical bond strength values have good linear correlation with the experimental data but with different accuracy and dispersion. The evaluation of interface fracture energy based on nonlinear fracture mechanics can be used as an auxiliary means of rationality assessment.
出处
《华东交通大学学报》
2015年第6期54-60,共7页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(11242006
11462005)
关键词
FRP
混凝土
界面
粘结强度
断裂能
FRP
concrete
interface
bond strength
fracture energy
