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王   静¹，张天宇¹，高荣丽²，李海云¹，李   然¹

 

 

(1.石家庄铁道大学 土木工程学院，石家庄 050043；2.中铁建安工程设计院有限公司，石家庄 050000)

摘要：对17组普通混凝土和超高性能混凝土（UHPC）与双相体不锈钢筋黏结性能的中心拉拔试验，综合考虑试件的混凝土强度等级、钢筋直径、相对保护层厚度及相对锚固长度等影响因素，分别研究两种不同类型混凝土与双相体不锈钢筋之间的黏结性能。结果表明：普通混凝土试件破坏现象为钢筋拔出破坏，UHPC试件破坏现象为钢筋拔出破坏、混凝土劈裂破坏和钢筋拔断破坏。混凝土强度等级越高、相对保护层厚度越大及相对锚固长度越长均能增强混凝土与不锈钢筋的黏结性能。在相同条件下，UHPC强度高，内部存在钢纤维，限制了侧向膨胀，极大增强了与不锈钢筋的握裹能力。因此，UHPC与不锈钢筋的黏结性能要明显好于普通混凝土。

关键词：双相体不锈钢钢筋；UHPC；普通混凝土；黏结性能

中图分类号：TU375.1

文章编号：1005-8249（2025）06-0128-08

DOI：10.19860/j.cnki.issn1005-8249.2025-06-022

 

 

 

 

 

WANG Jing¹,ZHANG Tianyu¹,GAO Rongli²,LI Haiyun¹,LI Ran¹

 

 

(1.School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China；

 

2.China Railway Jian’an Engineering Design Institute Co.,Ltd.,Shijiazhuang 050000,China)

 

Abstract：This study investigated the bond performance between duplex stainless steel rebar and two types of concrete,ordinary concrete and ultra high performance concrete (UHPC),using 17 sets of center pull-out tests.Key parameters including concrete strength grade,rebar diameter,relative cover thickness,and relative anchorage length.The results show that ordinary concrete specimens failed primarily by rebar pullout,whereas UHPC specimens exhibited three failure modes:rebar pullout,concrete splitting,and rebar fracture.Enhanced bond performance was observed with higher concrete strength grade,larger relative concrete cover thickness,and longer relative anchorage length.Under identical conditions,UHPC demonstrated significantly superior bond capacity with stainless steel rebar compared to ordinary concrete,attributable to its ultra high strength and steel fibers that restrict lateral expansion.Thus,UHPC exhibits markedly better bond behavior with duplex stainless steel rebar than ordinary concrete.

 

Key words：duplex stainless steel reinforcement;ultra-high performance concrete;ordinary concrete;bonding performance

 

作者简介：王  静(2000—)，女，硕士研究生，研究方向:高性能混凝土结构设计及理论。

通信作者：高荣丽(1977—)，女，硕士，高级工程师，研究方向:结构设计及理论。

收稿日期：2024-11-19