混凝土化学植筋冻融循环后拉拔试验研究  

Pull-out Test Research of Adhesive Steel Bar in Concrete After Freeze-Thaw Cycles

作　　者：张建荣[1] 张志燕[1] 萧雯[2] 蒋宗 

机构地区：[1]同济大学职业技术教育学院,上海200092 [2]慧鱼(太仓)建筑锚栓有限公司,江苏太仓215400

出　　处：《同济大学学报（自然科学版）》2008年第7期885-889,共5页Journal of Tongji University:Natural Science

基　　金：德国技术合作公司(GTZ)PPP资助项目

摘　　要：在分析国内外各种混凝土抗冻性试验方法的基础上,提出针对混凝土植筋的冻融试验方案.设计制作了12个混凝土立方体植筋试件,其中6个试件经受50次冻融循环,另6个试件作为对比组在自然状态下养护相同龄期.之后进行静力单向约束拉拔试验,测定了植筋试件的拉拔极限承载力,获得了拉力与位移的关系曲线.试验结果表明,经受50次冻融循环的植筋试件组与对比组相比,其约束拉拔极限承载力平均下降2.63%.Based on the analysis of freeze-thaw test method in different countries, the testing scheme about freezing and thawing cycle of adhesive steel bar in concrete was developed. 12 specimens of concrete cubic with adhesive steel bar were manufactured and prepared in two different environments, a group of 6 specimens undergoing 50 cycles of freezing and thawing, while the other group of 6 specimens being kept inside the room in natural atmosphere. Uni-axial static confine pull-out test were performed. The ultimate load and force-displacement curve were obtained. The results show that the average ultimate pull-out force of adhesive steel bar after 50 freeze-thaw cycles decreases by about 2.63 % compared with that of the contrast group.

关 键 词：混凝土 化学植筋 冻融循环 试验方法 

分 类 号：TU317[建筑科学—结构工程] TU111.25