摘要
为了提高寒冷环境中建筑用钢筋混凝土结构的耐久性和抗压强度,采取拔出试验方法对3种不同的结构的钢筋混凝土试样组进行全面的考察和研究分析,并且设置冻融次数在0~50之间,通过循环冻融处理来分析钢筋混凝土结构的黏结强度,并且进一步绘制出其黏结强度变化趋势图。结果表明,钢筋混凝土试样在经过冻融处理后均会出现破坏,但是破坏形式所有不同,为劈裂破坏或拔出破坏之一。经过50次冻融处理后,直径为14 mm的试样黏结强度由12.80 MPa直接降低为6.22 MPa;直径为18 mm的试样由10.93 MPa降低到4.24 MPa;直径为22 mm的试样由8.69 MPa降低到2.56 MPa。
In order to improve the durability and compressive strength of reinforced concrete structures used in buildings in cold environments,it adopts a pull-out experimental method to conduct a comprehensive investigation and test of three different types of reinforced concrete sample groups.Research and analysis,and set the number of freeze-thaw cycles between 0 and 50 times,analyze the bond strength of reinforced concrete structures by cyclic freeze-thaw treatment,and further draw the change trend of bond strength.The results show that the reinforced concrete samples will be damaged after freeze-thaw treatment,but the damage forms are all different,which is one of splitting damage or pulling out damage.After 50 times freeze-thaw treatments,the bond strength of the sample with a diameter of 14 mm was directly reduced from 12.80 MPa to 6.22 MPa.The sample with a diameter of 18 mm was reduced from 10.93 MPa to 4.24 MPa.The sample with a diameter of 22 mm was 8.69 MPa reduced to 2.56 MPa.
作者
马凤华
鲁艳蕊
陈琳
MA Fenghua;LU Yanrui;CHEN Lin(School of Engineering and Economics,Henan University of Finance and Economics,Zhengzhou 451464,China;School of International Design,Sanya University,Sanya 572022,China)
出处
《混凝土》
CAS
北大核心
2021年第4期13-15,共3页
Concrete
关键词
冻融环境
钢筋混凝土
黏结机理
freeze-thaw environment
reinforced concrete
bonding mechanism
