高温后植筋黏结滑移力学性能试验  

Experimental study on bond-slip behavior of embedded bar at high temperature

作　　者：袁广林[1] 刘林[1] 闫玉红[1] 

机构地区：[1]中国矿业大学建筑工程学院,江苏徐州221008

出　　处：《河海大学学报（自然科学版）》2008年第3期358-362,共5页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(50478100)

摘　　要：对在不同受热温度和不同加载制度下混凝土构件中2种锚固长度植筋的黏结滑移力学性能进行了试验.植筋的锚固长度分别为7倍和15倍植筋直径,受热温度分别为50℃,80℃,150℃和200℃.加载制度考虑单向拉拔和反复加载.分析了加载制度、锚固长度和加热温度对植筋试件的极限黏结应力和极限滑移的影响.结果表明,不同条件对植筋试件的黏结滑移力学性能有显著影响.根据试验结果给出了高温后植筋试件黏结应力的计算方法.Under two different loading systems, pull-out loading and repeated loading, the bond-slip behavior of bars embedded in concrete with anchorage lengths of 7 and 15 times the bar diameter at 50℃, 80℃, 150℃ and 200℃ was studied. The influence of the loading system, anchorage length and temperature on the extreme bond stress and extreme slide of concrete specimens were analyzed and proved to be significant. Based on the results of the experiment, a calculation method was developed for the bond stress of specimens after being heated.

关 键 词：植筋 黏结滑移 锚固长度 高温 

分 类 号：TU317.3[建筑科学—结构工程]