纤维增强塑料筋混凝土板的变形研究

摘要

通过纤维增强塑料筋混凝土四边简支双向板的冲切性能试验,得到试验双向板的荷载-挠度曲线以及挠度分布图.试验表明,在冲切破坏发生之前,试验双向板的变形主要是弯曲变形；冲切纤维增强塑料筋混凝土双向板荷载-挠度曲线的主要影响因素的分析成果,为纤维增强塑料筋加强混凝土结构在工程中的应用和对混凝土板冲切问题的深入研究可提供试验依据.%By punching shear test on eight two-way fiber reinforced polymer (FRP) concrete slabs which were simply supported on four sides and subjected to off-center concentrated load,we obtained the load-deflection characteristics of the test slabs and the deflection distribution.Test results showed that the deformations of the test slabs before punching shear failure was caused by bending moments.Main factors influencing the punching load-deflection curves under off-center concentrated load were concrete strength,reinforcement ratio of FRP bars,location of concentrated load,etc.The test results are beneficial to the application of FRP bars in engineering and the indepth research on punching shear performace of concrete slabs.