无机聚合物混凝土-钢筋拉拔试验研究  

Inorganic Polymer Concrete-steel Bar Pullout Test Study

作　　者：袁晓辉[1] 卢哲安[1] 范小春[2] 张传银[1] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点试验室,武汉430070 [2]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《武汉理工大学学报》2013年第6期117-122,共6页Journal of Wuhan University of Technology

基　　金：武汉理工大学自主创新研究基金(2012-Ⅳ-070)

摘　　要：为了研究无机聚合物混凝土与钢筋间的粘结性能,制作强度等级为C40的两组6个无机聚合物混凝土(IPC)-钢筋拉拔试件,并对其进行拔出试验,其极限拔出荷载均比文献同类普通混凝土-钢筋拉拔试验极限荷载大,表明无机聚合物混凝土和钢筋之间的粘结性能要优于普通混凝土。通过对无机聚合物混凝土-光圆钢筋试验拉拔荷载位移曲线的分析将其破坏过程分为微滑移阶段、滑移阶段、下降段和残余段4个阶段。对试验拉拔过程中粘结应力的分析发现平均粘结应力与锚固深度无关,主要与钢筋表面和混凝土间摩擦力有关,光圆钢的τ-x分布曲线显示粘结应力最大的区域出现在距锚固端20～40mm处。In order to analyze the bonding performance of inorganic polymer concrete （IPC） with steel bar, two groups of IPC-steel bar pullout specimens （6 samples in total） were made with the strength grade of CA0. The pullout test results show that the ultimate pulling strength of IPC-steel bar pullout specimen is higher than that of references ordinary concrete-steel bar in literature,which means the bonding properties of IPC with steel bar is better than that of ordinary concrete. Through the analysis of the load-displacement curves gathered from pullout test of IPC-smooth round steel bar specimens,the failure process of samples can be divided into 4 stages： micro-slip stage,slip stage,decline stage and residu- al period. And the analysis of the bonding stress in pulling process shows that the average bonding stress is mainly influenced by the friction between steel surface and IPC while has little connections with the anchorage depth, and the r-x distribution curves show that the largest bonding stress area places in the distance of 20-40 mm to the anchorage end.

关 键 词：无机聚合物混凝土 拉拔 粘结性能 粘结应力 

分 类 号：TU5[建筑科学—建筑技术科学]