玄武岩纤维增强复合筋与再生混凝土粘结性能试验研究  

Experimental study on bond properties between BFRP bar and recycled concrete

作　　者：赵琳[1] 王家贺 刘华新[1] ZHAO Lin;WANG Jia-he;LIU Hua-xin

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001 [2]中交路桥建设有限公司,北京100024

出　　处：《砖瓦》2022年第12期37-41,共5页Brick-tile

基　　金：研究生联合培养基地项目(YJD202102)。

摘　　要：以再生骨料取代率、骨料粒径、锚固长度为变量,通过拉拔试验研究粘结性能。试验结果表明:当再生骨料取代率低、锚固长度小时,发生拔出破坏;当玄武岩纤维增强复合筋的锚固长度为7d时,发生劈裂破坏;粘结-滑移曲线随再生骨料取代率的增加而更加平缓,粘结应力却随取代率增加而降低;随再生骨料粒径的增大,粘结-滑移曲线的线性上升段斜率逐渐增大,非线性段滑移量平缓增大;随着锚固长度的增加,试件承受的荷载逐渐增大,而平均粘结应力却先增大后减小。试件的拔出荷载随锚固长度的增加而增加,但平均粘结应力却随锚固长度的增加呈先增大后减小趋势。In order to study the bond performance between recycled concrete and BFRP bars,pull-out tests were carried out.Based on the replacement rate of recycled aggregate,aggregate size and anchorage length as reference factors,the failure modes and bond stresses of drawing specimens were analyzed.When the replacement rate of recycled aggregate is low and the anchorage length is small,pull-out failure occurs;when the anchorage length is 7D,splitting failure often occurs;while the bond stress decreases with the increase of replacement rate;With the increase of particle size of recycled aggregate,the slope of linear ascending section of bond-slip curve increases gradually,and the slip of non-linear section increases slowly;With the increase of anchorage length,the load on the specimens increases gradually,but the average bond stress increases first and then decreases.The conclusion of the study can provide a theoretical basis for the engineering application of recycled concrete and FRP bars.

关 键 词：粘结性能 取代率 骨料粒径 锚固长度 

分 类 号：TU528.57[建筑科学—建筑技术科学]