铁尾矿砂混凝土与HRB500钢筋锚固性能试验研究  

Experimental Study on Anchorage Performance of Iron Tailings Sand Concrete and HRB500 Steel Bar

作　　者：康洪震 王宇 李强 KANG Hong-zhen;WANG Yu;LI Qiang(School of Civil Engineering,Tangshan University,063000;College of Civil and Architectural Engineering,North China University of Science and Technology,Tangshan 063009;Hebei Key Laboratory of Buiiding Engineering and Tailings Utilization,Tangshan 063000)

机构地区：[1]唐山学院土木工程学院,063000 [2]华北理工大学建筑工程学院,唐山063009 [3]河北省建筑工程与尾矿综合利用重点实验室,唐山063000

出　　处：《混凝土与水泥制品》2020年第1期92-96,共5页China Concrete and Cement Products

基　　金：国家自然科学基金项目(51378331);河北省自然科学基金项目(E2016105062);唐山市科技计划项目(17130255a)

摘　　要：为研究HRB500高强钢筋在铁尾矿砂混凝土中的锚固性能,通过两类共27个不同锚固类型试件的直接拉拔试验方法,分析了不同锚固形式钢筋的受力特征,研究了铁尾矿砂混凝土强度、保护层厚度和锚固长度等因素对锚固性能的影响。结果表明,随着混凝土强度、保护层厚度和锚固长度的增加,锚固强度逐渐增大,且呈一定的线性关系,并在保护层厚度和锚固长度方面存在限值。同时,与GB 50010-2010《混凝土结构设计规范》中的锚固长度进行对比,提出了HRB500钢筋在铁尾矿砂混凝土中锚固长度设计建议。In order to study the anchorage performance of HRB500 high-strength steel bar in iron tailings sand concrete, the mechanical characteristics of different anchorage forms of steel bar were analyzed by direct pull-out test of 27 specimens of different anchorage types, and the effects of strength of iron tailings sand concrete, thickness of protective layer and anchorage length on anchorage performance were studied. The results show that with the increase of concrete strength, protective layer thickness and anchorage length, anchorage strength increases gradually and has a certain linear relationship, and there are limits in protective layer thickness and anchorage length. At the same time, compared with the anchorage length in GB 50010-2010 The Code Design of Concrete Structures, the design proposal of anchorage length of HRB500 steel bar in iron tailings sand concrete is put forward.

关 键 词：铁尾矿砂混凝土 HRB500钢筋 拉拔试验 锚固方式 

分 类 号：TU528.56[建筑科学—建筑技术科学]