500MPa级钢筋在受侧压混凝土中的锚固性能试验研究  

Experimental study on anchorage performance of 500MPa rebar in concrete under lateral pressure

作　　者：刘璐[1] 周一航[1] 付瑞佳[1] 周硕文 Liu Lu;Zhou Yihang;Fu Ruijia;Zhou Shuowen(CABR Technology Co.Ltd,Beijing 100013,China)

机构地区：[1]建研科技股份有限公司,北京100013

出　　处：《建筑科学》2019年第3期90-94,共5页Building Science

基　　金：中国建筑科学研究院院标准规范研究课题(20130122336230020)

摘　　要：进行了23组69个受侧压混凝土中心置筋锚固拉拔试件试验,锚筋采用HRB500高强钢筋,研究了不同侧压比对试件锚固性能的影响。试验结果表明,在侧压比为0.4以下时,随侧压比增大,极限锚固强度整体呈线性增大趋势;侧压比为0.4～1.0时,极限锚固强度值随侧压比增大基本维持不变。通过研究进一步提出受侧压情况下钢筋的锚固长度设计建议。Axial pull-out tests of 69 concrete specimens under lateral pressure are carried out.The specimens are reinforced with HRB500 steel bars.The influence of different lateral pressure ratio on bond-anchorage performance is investigated.The test results indicate that:when the lateral pressure ratio is under 0.4,the maximum anchorage strength grows linearly with the increase of lateral pressure ratio;when the lateral pressure ratio is between 0.4~1.0,the maximum anchorage strength maintains stable with the increase of lateral pressure ratio.Design recommendation for anchorage length of steel bar under lateral pressure is proposed.

关 键 词：受侧压混凝土 500MPA钢筋 锚固性能 拔出试验 

分 类 号：TU3121.1[建筑科学—结构工程]