自密实混凝土与预制混凝土构件粘结平面抗剪性能研究
|
摘要
通过对26个试件进行自密实混凝土与预制墙板的界面粘结滑移试验,得到了界面粘结试件的受力过程、破坏形式以及试件的剪应力-滑移【math141z】曲线。主要研究自密实混凝土强度、混凝土类型(NC与SCC)、界面尺寸、粘结面的处理措施(凿毛与界面剂)、膨胀剂掺量和其他主要因素对自密实混凝土与预制墙板界面粘结性能的影响。试验结果表明:界面粘结破坏主要发生在结合面处,且大部分的试件两个结合面的位移不是同步的;混凝土强度、混凝土类型、界面剂以及膨胀剂掺量均对自密实混凝土与预制墙板界面粘结性能有较大的影响;分析粘结滑移曲线将试件的受力过程划分为:初始刚度阶段、弹性变形阶段、塑性变形阶段、塑性破坏阶段。
Through the interface bond-slip tests between self-compacting concrete and the prefabricated panel on 26 specimens, loading process, failure mode and shear stress-slip curve were obtained. The impacts of self-compacting concrete strength, concrete type(NC and SCC), interface size, bonding surface treatment measures(chiseling and interface agent), expansion agent dosage and other main factors on the interface bonding performance of self-compacting concrete and prefabricated panel. The test results show that the interface bond failure mainly occurs at the joint surface, and the displacements of the two interfaces of most of the specimens are not synchronous. The concrete strength, concrete type, interface agent and expansion agent dosage have great influence on the interface bonding performance of self-compacting concrete and prefabricated panel. The bond-slip curve is analyzed to divide the specimen stress process into four stages, including: initial stiffness stage, elastic deformation stage, plastic deformation stage and plastic failure stage.
Through the interface bond-slip tests between self-compacting concrete and the prefabricated panel on 26 specimens, loading process, failure mode and shear stress-slip curve were obtained. The impacts of self-compacting concrete strength, concrete type(NC and SCC), interface size, bonding surface treatment measures(chiseling and interface agent), expansion agent dosage and other main factors on the interface bonding performance of self-compacting concrete and prefabricated panel. The test results show that the interface bond failure mainly occurs at the joint surface, and the displacements of the two interfaces of most of the specimens are not synchronous. The concrete strength, concrete type, interface agent and expansion agent dosage have great influence on the interface bonding performance of self-compacting concrete and prefabricated panel. The bond-slip curve is analyzed to divide the specimen stress process into four stages, including: initial stiffness stage, elastic deformation stage, plastic deformation stage and plastic failure stage.
引文
[1] 罗素蓉,郑建岚.自密实混凝土在加固工程中的应用研究[J]. 建筑材料学报,2006,9(3):330-336.
[2] SU N, HSU K C,CHAI H W. A simple mix design method for self-compacting concrete[J]. Cement and Concrete Research,2001,31(12):1799-1807.
[3] MA BAO GUO,WEN XIAO DONG,WANG MING YUAN, et al. Drying shrinkage of cement-based materials under conditions of constant temperature and varying humidity[J]. Journal of China University of Mining & Technology, 2007,17 (3): 428-431.
[4] PHILPPE T, AHMED L, KHALIL H, et al. Cracking tendency of self-compacting concrete subjected to restrainded shrinkage: experimengal study and modeling[J]. Journal of Materials in Civil Engineering, 2006,18(1):46-54.
[5] 孟龙飞.自密实混凝土与预制墙板界面粘结性能试验研究[D].南京:南京工业大学,2016.
[6] 安雪晖,黄绵松,大内雅博,等.自密实混凝土技术手册[M].北京:中国水利水电出版社,知识产权出版社,2008.
[7] 田稳,赵志方,赵国藩,等.新老硅的粘结机理和测试方法研究综述[J].河北理工学院学报,1998,20(1):84-93.
[2] SU N, HSU K C,CHAI H W. A simple mix design method for self-compacting concrete[J]. Cement and Concrete Research,2001,31(12):1799-1807.
[3] MA BAO GUO,WEN XIAO DONG,WANG MING YUAN, et al. Drying shrinkage of cement-based materials under conditions of constant temperature and varying humidity[J]. Journal of China University of Mining & Technology, 2007,17 (3): 428-431.
[4] PHILPPE T, AHMED L, KHALIL H, et al. Cracking tendency of self-compacting concrete subjected to restrainded shrinkage: experimengal study and modeling[J]. Journal of Materials in Civil Engineering, 2006,18(1):46-54.
[5] 孟龙飞.自密实混凝土与预制墙板界面粘结性能试验研究[D].南京:南京工业大学,2016.
[6] 安雪晖,黄绵松,大内雅博,等.自密实混凝土技术手册[M].北京:中国水利水电出版社,知识产权出版社,2008.
[7] 田稳,赵志方,赵国藩,等.新老硅的粘结机理和测试方法研究综述[J].河北理工学院学报,1998,20(1):84-93.