摘要
目的研究双相体不锈钢筋的粘结锚固性能,解决因钢筋锈蚀引起的混凝土结构耐久性问题.方法对11组66个双相体不锈钢筋与混凝土的粘结锚固试件进行中心拔出试验,分析双相体不锈钢筋与混凝土的粘结锚固特点和影响粘结锚固性能的主要因素及变化规律.结果基于试验数据,统计回归出了双相体不锈钢筋粘结强度计算公式;在结构可靠度分析的基础上,采用中心点法推导出了双相体不锈钢筋混凝土构件的临界锚固长度计算公式;在普通钢筋基本锚固长度计算公式的基础上,给出了合理的锚固长度设计建议.结论笔者所推出的双相体不锈钢筋的粘结强度计算公式与锚固长度设计建议公式,能够为不锈钢筋的相关规范编写及其工程应用提供可靠的理论依据和设计参考.
The bond and anchorage properties of duplex stainless steel bars are studied to solve the durability problem of concrete structures caused by corrosion of steel bars.Based on pull-out tests of the 11 th group of 66 duplex stainless steel reinforced concrete bond-anchorage specimens.The characteristics of bond-anchorage,and the main factors and the changing regulation affecting the performance of the bond-anchorage of duplex stainless steel reinforced concrete is analyzed.Based on the tests results,the bonding strength calculating formula of duplex stainless reinforced steel is regressed.Based on the reliability analysis of structural,the critical anchorage length formula of duplex stainless reinforced concrete members is exported by using the Central Point Method.Based on the comparison of the bond-anchorage length calculating formula of the ordinary steel bars in the code for design of concrete structures,the reasonable design of anchorage length is given.The formula for calculating the bond strength of duplex stainless steel bars and the suggested formula for anchorage length design provide reliable theoretical basis and design reference for the compilation of relevant codes of stainless steel bars and their engineering applications.
作者
徐春一
苑永胜
逯彪
郭奕含
XU Chunyi;YUAN Yongsheng;LU Biao;GUO Yihan(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第3期445-452,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51408373)
关键词
双相体不锈钢筋
粘结锚固
锚固长度设计
可靠度
duplex stainless steel reinforcement
bond anchorage
anchorage length design
reliability
