摘要
基于国内外大量理论与试验研究的基础上,通过修正已有文献中提供的碳纤维应力应变计算模型,进一步研究碳纤维增强复合材料fiber reinforced polymer(FRP)约束混凝土的特点,指出FRP约束混凝土的极限应力和应变主要与FRP横向约束强度、纤维的类型、纵向与横向约束包裹方式、矩形截面的转角、所用结构构件等参数有关并提出相应的模型计算公式,上述所采用的计算方法较为简单且全面综合考虑了各参数对模型曲线的影响。最后比较确定FRP约束构件的应力应变模型,表明模型四在一定的条件下能够很好的应用于工程实际中,为指导结构工程师在进行结构构造加固时考虑结FRP的约束性能具有重要的指导作用和工程价值。
Based on a large number of theoretical and experimental studies at home and abroad,the paper further studies the characteristics of CFRP confined concrete by amending the calculation model of stress and strain of carbon fiber provided in the literature,and points out that the ultimate stress of FRP confined concrete and strain are mainly related to the lateral restraint strength of FRP,the type of fiber,the wrapping mode of longitudinal and transverse restraint,the corner of rectangular section,the structural components used and other parameters.The corresponding formula calculation formulas are proposed,which are relatively simple and comprehensive,and the effect of each parameter on the model curve is considered.Finally,the stress-strain model of the FRP restraining component is compared and confirmed,which shows that the model IV can be well applied in engineering practice under certain conditions.It is of great significance and value to guide the structural engineers to consider the restraining performance of the FRP during structural reinforcement.
出处
《萍乡学院学报》
2017年第6期47-50,共4页
Journal of Pingxiang University
