【摘要】 基于33个拉拔试件和27个梁式试件的试验结果,对新型FRP筋与不同环境介质(包括混凝土C30、掺纤维与不掺纤维的混凝土C50、R42.5水泥浆以及环氧树脂等)之间的粘结性能进行了较为系统的研究。研究表明,新型FRP筋的粘结强度略低于钢筋;混凝土强度等级对FRP筋的粘结性能影响较大,但是否掺加聚丙烯纤维对其粘结性能影响较小;基于梁式试验的FRP筋粘结强度稍低于基于拉拔试验的FRP筋粘结强度。更多还原

【Abstract】 Based on tests of 33 pull out specimens and 27 beam specimens, bond properties of new type fiber reinforced polymer(FRP) bars in different materials (such as concrete C30, concrete C50 with and without polypropylene fibers, grade 42.5 mortars and epoxy resins) are systematically studied. Studies showed that bond strength of new type FRP bars was a little lower than that of steel bars. Concrete strength had larger influence on bond strength of FRP bars, but the influence of polypropylene fibers in concrete was rather less. In addition, bond strength in beam specimens was a little less than that in pull out specimens.更多还原