【摘要】 为研究不同环境中植筋性能的变化规律,进行了普通水环境和盐水环境下植筋试件的拉拔试验,得到了植筋试件的极限承载力、荷载-滑移曲线,分析了不同环境对植筋试件力学性能的影响,得到了植筋试件在不同环境不同锚固长度下力学性能随时间的变化规律。研究表明,在普通水环境中植筋试件的极限承载力、粘结刚度、延性及平均粘结应力随作用时间的增长均有所增加,而在盐水环境中植筋试件的极限承载力、粘结刚度、延性及最大平均粘结应力随作用时间的增长则有所退化。试验结果可为实际工程相似情况下的植筋施工提供参考。更多还原

【Abstract】 In order to investigate the change law of properties of bonded rebar in different environments,pull-out test of bonded rebar specimens under ordinary water immersion and salt water immersion were conducted.The ultimate bearing capacity and pull-slip curves of bonded rebar specimens were obtained,with which the influence of different environments on mechanical properties of bonded rebar specimens was analyzed. The properties of bonded rebar specimens under different environments and different anchorage lengths were gained. The research indicated that the ultimate bearing capacity,the bond stiffness,the ductility and the average bond stress of bonded rebar specimens under ordinary water immersion increased with the increase of time,but went down under salt water immersion. The results of this research can offer a reference to the practical bonded rebar construction under the similar situation.更多还原