采用JQW03单纤维压缩弯曲仪对细度相近的超细羊毛、羊绒进行弯曲压缩性能测试,通过对测试得到的峰值力、等效弯曲模量、抗弯刚度和弯曲压缩曲线进行对比分析,得出超细羊毛和羊绒纤维在弯曲压缩性能上的差异。实验结果表明:羊绒纤维的峰...采用JQW03单纤维压缩弯曲仪对细度相近的超细羊毛、羊绒进行弯曲压缩性能测试,通过对测试得到的峰值力、等效弯曲模量、抗弯刚度和弯曲压缩曲线进行对比分析,得出超细羊毛和羊绒纤维在弯曲压缩性能上的差异。实验结果表明:羊绒纤维的峰值力、抗弯刚度和等效弯曲模量均小于超细羊毛纤维,超细羊毛弯曲压缩过程所受的弯曲载荷在0.25 m N左右,而羊绒所受的弯曲载荷在0.25 m N以下,即在同样的条件下,羊绒更容易被压弯,也就是羊绒纤维比超细羊毛纤维柔软;羊毛的弯曲压缩曲线较平缓,羊绒纤维的弯曲压缩曲线出现多峰。展开更多
Concrete Filled FRP （Reinforced Polymeric Plastic） Tubes （CFFT） and Reinforced Concrete Filled FRP Tubes （RCFFT） are known to have the capability to enhance structural performance in terms of structural stabilit...Concrete Filled FRP （Reinforced Polymeric Plastic） Tubes （CFFT） and Reinforced Concrete Filled FRP Tubes （RCFFT） are known to have the capability to enhance structural performance in terms of structural stability, ductility, as well as chemical resistance when compared with conventional concrete members. In this study, the authors evaluate the structural performance of the CFFT and the RCFFT through flexural tests for the purpose of applying the members as flexural ones. Moreover, the compressive behavior of the CFFT and the RCFFT members was investigated to examine their confinement effects. Based on the experimental and analytical results of the compressive behavior of the members, equations for estimating the ultimate compressive strengths of the CFFT and the RCFFT were proposed. In addition, the degree of improvement on the flexural performance of the RCFFT member strengthened by the FRP was analyzed from the flexural tests.展开更多
文摘采用JQW03单纤维压缩弯曲仪对细度相近的超细羊毛、羊绒进行弯曲压缩性能测试,通过对测试得到的峰值力、等效弯曲模量、抗弯刚度和弯曲压缩曲线进行对比分析,得出超细羊毛和羊绒纤维在弯曲压缩性能上的差异。实验结果表明:羊绒纤维的峰值力、抗弯刚度和等效弯曲模量均小于超细羊毛纤维,超细羊毛弯曲压缩过程所受的弯曲载荷在0.25 m N左右,而羊绒所受的弯曲载荷在0.25 m N以下,即在同样的条件下,羊绒更容易被压弯,也就是羊绒纤维比超细羊毛纤维柔软;羊毛的弯曲压缩曲线较平缓,羊绒纤维的弯曲压缩曲线出现多峰。
文摘Concrete Filled FRP （Reinforced Polymeric Plastic） Tubes （CFFT） and Reinforced Concrete Filled FRP Tubes （RCFFT） are known to have the capability to enhance structural performance in terms of structural stability, ductility, as well as chemical resistance when compared with conventional concrete members. In this study, the authors evaluate the structural performance of the CFFT and the RCFFT through flexural tests for the purpose of applying the members as flexural ones. Moreover, the compressive behavior of the CFFT and the RCFFT members was investigated to examine their confinement effects. Based on the experimental and analytical results of the compressive behavior of the members, equations for estimating the ultimate compressive strengths of the CFFT and the RCFFT were proposed. In addition, the degree of improvement on the flexural performance of the RCFFT member strengthened by the FRP was analyzed from the flexural tests.
