高强钢筋与混凝土锚固性能研究  

Anchoring Behavior Between High-Strength Steel Bar and Concrete

作　　者：丁红岩[1] 刘源[1] 李海瑞[1] 郭耀华[1] 刘麟玮[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2016年第4期376-384,共9页Journal of Tianjin University：Science and Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA051705);国家自然科学基金资助项目(51379142)

摘　　要：为了得到高强钢筋HTB650与混凝土的锚固性能,对36个黏结锚固试件和30个两侧贴焊短筋的机械锚固试件进行拔出试验.试验考虑了相对锚固长度、混凝土强度、相对保护层厚度、配箍率和钢筋强度对锚固性能的影响.试验结果表明,高强钢筋黏结锚固的破坏形式不同于机械锚固.两者的极限黏结强度随着相对锚固长度、混凝土强度、相对保护层厚度、配箍率和钢筋强度而改变,变化趋势基本一致.通过回归分析,得出高强钢筋与混凝土之间黏结锚固与机械锚固的极限黏结强度计算公式.In order to obtain the anchoring behavior between high-strength steel bar HTB650 and concrete, pullout tests were done on 36 bonding anchorage specimens and 30 machinery anchorage specimens with short welded steel on both sides. The effects of relative anchorage length, concrete strength, relative thickness of protective lay, stirrup ratio and steel strength were considered in the tests. Test results show that the failure modes of bonding anchorage are different from those of machinery anchorage. Both trends of the ultimate bonding strength are basically the same, following the changes of relative anchorage length, concrete strength, relative thickness of protective lay, stirrup ratio and steel strength. Through regression analysis, the formulas were obtained for ultimate bonding strength of bonding anchorage and machinery anchorage between high-strength steel bar and concrete.

关 键 词：高强钢筋 锚固性能 黏结锚固 机械锚固 拔出试验 

分 类 号：TU375[建筑科学—结构工程]