高强不锈钢筋与UHPC的粘结锚固性能研究  

Study on bonding and anchoring properties of stainless steel bar and UHPC

作　　者：李海云 吴文辉 侯楠 李然 邓瑞婷 赵晶 LI Haiyun;WU Wenhui;HOU Nan;LI Ran;DENG Ruiting;ZHAO Jing(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Xingtai branch of Xuyang Engineering Co.,Ltd.,Xingtai 054000,China;Guangzhou Metro Design and Research Institute Co.,Ltd.,Guangzhou 510000,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]旭阳工程有限公司邢台分公司,河北邢台054000 [3]广州地铁设计研究院股份有限公司,广东广州510000

出　　处：《西安建筑科技大学学报（自然科学版）》2023年第5期633-642,共10页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：河北省建设科技研究项目指导性计划项目(2021-2066)。

摘　　要：为了研究不锈钢筋与超高性能混凝土(ultra-high performance concrete,UHPC)的粘结性能,制作了12组36个试样进行中心拉拔试验,研究了保护层厚度、锚固长度、配箍率、钢筋直径及钢筋品种对不锈钢筋与UHPC的粘结锚固性能的影响.研究不锈钢与UHPC在锚固段的粘结应力分布,分析导致试件劈裂破坏的原因.通过统计回归对钢筋混凝土粘结强度表达式进行了修正,得到了更加适用于不锈钢筋UHPC粘结强度计算公式.结果表明,修正的粘结强度表达式可较为准确地求出不锈钢筋与UHPC的粘结强度.In order to study the bonding properties of stainless steel rebar and ultra-high performance concrete(UHPC),12 groups of 36 specimens were made for central pull-out test.The effects of protective layer thickness,anchorage length,stirrup ratio,steel bar diameter and steel bar variety on the bond performance between stainless steel bars and UHPC were studied.The bond stress distribution of stainless steel and UHPC in the anchorage section was studied,and the cause of splitting failure of the specimen was analyzed.The expression of reinforced concrete bond strength was revised through statistical regression,and a more suitable formula for UHPC bond strength of stainless steel bars was obtained.The results show that the modified bond strength expression can accurately calculate the bond strength between stainless steel bars and UHPC.

关 键 词：不锈钢筋 超高性能混凝土 粘结强度 拉拔试验 

分 类 号：TU375.1[建筑科学—结构工程]