CFRP增强钢筋混凝土梁柱节点锚固措施  

Anchoring measures for CFRP-strenghtened RC beam-column joints

作　　者：徐俊艳[1] 李贵炳[1] 郑彬彬 史俊伟[1] 董羽[1] XU Junyan;LI Guibing;ZHENG Binbin;SHI Junwei;DONG Yu(School of Management Science and Engineering,Shandong Technology and Business University,Yantai Shandong 264005,China)

机构地区：[1]山东工商学院管理科学与工程学院

出　　处：《中国安全科学学报》2018年第6期122-128,共7页China Safety Science Journal

基　　金：山东省自然科学基金资助(ZR2017MEE019)

摘　　要：对碳纤维增强材料（CFRP）在节点处锚固体系的研究及确定性结论很少,ACI440.2R规范仅给出了概念性的锚固措施;《混凝土结构加固设计规范》虽然提出了定量的锚固措施但缺乏理论支撑和试验支撑。为确定梁柱节点处CFRP具体的锚固措施,对粘贴CFRP加固的钢筋混凝土梁柱节点试件分别采用体内和体外锚固、并采用悬臂梁分级加载的试验方法研究锚固体系的可靠性和有效性。结果表明：现行规范的锚固措施无法保证结构加固后的安全;机械锚固方式锚固CFRP是可靠有效的;夹具的尺寸及刚度对锚固效果有显著影响,夹具的趾部长度不宜超过100 mm;体外锚固不破坏原结构并能提高柱的抗剪能力,在结构加固时宜优先采用。Presently,there are very few researches and definitive conclusions on the anchorage system of CFRP-strenghtened RC beam-column joints. ACI440.2 R emphasized that special attention should be paid to the anchorage of CFRP laminates, and only proposed some conceptual anchorage measures.GB50367-2013 suggested quantitative anchorage measures, which were lack of theoretical and experimental support. To investigate the reliability and effectiveness of an anchorage system,this study tested six CFRP-strenghtened RC beam-column joints with different anchorage systems. The experimental results show that the anchorage measures suggested by the codes cannot ensure the safety of a strenghtened member,that mechanical anchorage system is reliable and effective,that the foot-plate length and stiffness of the anchorage have significant effects on its anchoring effectiveness,and the suitable foot-plate length of the anchorage is no more than 100 mm,and that the external anchorage does not destroy the original structure and can improve the shear capacity of the column,and is preferred in engineering application.

关 键 词：钢筋混凝土(RC) 梁柱节点 碳纤维增强材料(CFRP) 锚固体系 可靠性 有效性 

分 类 号：X948[环境科学与工程—安全科学]