玻璃纤维增强复合材料筋肋参数优化试验研究

利用拉拔试验对玻璃纤维增强复合材料(GFRP)带肋筋与混凝土的粘结性能进行试验研究，并对筋的肋参数进行优化。自行设计了 30种不同肋参数的GFRP带肋筋，试验变量包括筋直径、肋高度和肋间距。在此基础上，制作了90个标准拉拔试件，分别测试了 GFRP带肋筋的粘结强度和加载端滑移，得到了相应的粘结-滑移曲线；根据肋参数的优化准则对各种GFRP带肋筋的粘结-滑移曲线进行分析，确定GFRP带肋筋的最佳肋参数。试验结果表明:肋参数对GFRP带肋筋与混凝土的粘结性能影响显著；GFRP带肋筋的最佳肋间距为筋直径的1倍，最佳肋高度为筋直径的6 %，即最佳肋高度与最佳肋间距的比值为0.06。 

Experimental study on optimization of rib geometries for glass fiber reinforced composite rebars

This paper present s the test result s of the experimental study on 30 different rib geomet ries of the glass fiber reinforced composite ( GFRP) ribbed rebars. 90 standard pull2out specimens were used to study the bond be2havior of GFRP ribbed rebars to concrete. The test variables were the rebar diameter , the rib spacing and the rib height . For each rebar , the bond st rength and the slip at the loaded end were obtained , and the corresponding bond2 slip relationship curves were analyzed. Using the optimum criterion , design recommendations were made concerning optimum rib geomet ries of GFRP ribbed rebars with superior bond2 slip characteristics. The test result s show that the bond behavior between GFRP ribbed rebars and concrete varies obviously with the rib geomet ries : the optimal rib spacing of GFRP ribbed rebars is 1 times the rebar diameter , the optimal rib height is 6 % of the rebar diameter , and the optimal ratio of rib height to rib spacing is 0. 06.