内焊钢筋-钢管混凝土界面粘结滑移性能  

Interfacial bond-slip properties of internally welded steel bar-steel pipe concrete

作　　者：倪敬尧 邓年春[1,2] 彭修宁[1,2] 陈召桃 NI Jingyao;DENG Nianchun;PENG Xiuning;CHEN Zhaotao(College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Disaster Prevention and Engineering Safety(Guangxi University),Nanning 530004,China;Guangxi Road and Bridge Engineering Group Co.,Ltd.,Nanning 530200,China)

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]广西防灾减灾与工程安全重点实验室(广西大学),南宁530004 [3]广西路桥工程集团有限公司,南宁530200

出　　处：《中国科技论文》2024年第7期769-776,共8页China Sciencepaper

基　　金：国家自然科学基金资助项目(52268048);广西科技重大专项(桂科AA22068066)。

摘　　要：为了探究提高钢管混凝土组合结构钢管与混凝土界面粘结强度的措施,研究不同形式的内焊钢筋对两者界面粘结强度的影响,设置4种不同形式钢管内焊钢筋结构的钢管混凝土构件进行推出试验,对试验结果设置参数以比较不同内焊钢筋构造措施对两者界面粘结性能的影响,结合曲线与试验现象描述了滑移发生过程。应用ABAQUS软件进行有限元模拟,对比分析了不同内焊钢筋构造措施对粘结滑移性能的影响,并提出了钢管内焊钢筋构造粘结力的计算方法。结果表明:内焊钢筋的构造措施可以大幅度提升钢管混凝土界面的粘结强度;随着钢筋环数的增加,界面粘结强度逐渐增大。Aiming at the improvement of the interfacial bond strength between steel pipe and concrete of steel pipe-concrete compos⁃ite structure,and the investigation of the influence of different forms of internally welded reinforcement on the bond strength between the two interface,the steel pipe-concrete members with four different steel pipe-wall internally welded reinforcement structures were set up for the push-out test.The parameters were set on the test results to compare the influences of different forms of internally welded reinforcing bars on the bond performance between the two interface,and the combination of the curves and the test results described slipping process.ABAQUS software was used to perform finite element simulation to compare and analyse the effects of different structural measures on the bond-slip performance of welded reinforcement inside the steel pipe,and the calculation method of the shear capacity of steel pipe with built-in welded reinforcement was proposed.The results show that the structural measures of the internal welded reinforcement can greatly improve the bond strength of the steel pipe-concrete interface,and the interface bond strength gradually increases with the increase of the number of reinforcement rings.

关 键 词：钢管混凝土 粘结滑移性能 内焊钢筋结构 推出试验 粘结力 

分 类 号：TU398[建筑科学—结构工程]