高强钢筋与高强混凝土锚固性能试验研究

发布时间：2018-02-17 02:47

本文关键词： 高强钢筋高强混凝土黏结锚固机械锚固拉拔试验　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：高强钢筋和高强混凝土的应用可显著节省能源和资源，促进建筑业的发展和改革，促进我国经济社会的发展。采用高强钢筋和高强混凝土是走环保、节能，可持续发展道路的重要途径。钢筋和混凝土之间存在的锚固作用，是这两种材料能协同工作、一起承担荷载的重要原因。钢筋和混凝土通过锚固作用，相互传递力，共同承受载荷。锚固是钢筋混凝土结构承载受力的基本条件，锚固作用机理研究也是钢筋砼结构理论研究中的基本问题。目前，对于普通材料的锚固问题已经有较多的理论和试验方面的研究，并且已经有相关的规范颁布。但是，高强度材料锚固的研究还非常少，涉及高强度材料的应用开发，如何降低锚固长度，优化现有锚固理论变得越来越重要。本文主要针对高强混凝土与高强钢筋之间的黏结锚固和机械锚固进行研究。通过不同参数下的拉拔试验，根据试验现象和数据，总结出高强钢筋与高强混凝土的黏结锚固特性及机械锚固特性，探究不同因素对其锚固性能的影响。本文利用天津本地建筑材料，通过混凝土配比试验，得到了C80混凝土的配合比；在此基础上，设计了33个拉拔试件，，分别考虑混凝土强度、钢筋直径、保护层厚度、锚固长度及配箍率等参数对黏结锚固强度的影响，探究高强钢筋与高强混凝土的黏结锚固性能；通过33个拉拔试件，分别考虑混凝土强度、钢筋直径、保护层厚度、锚固长度及配箍率等参数对机械锚固强度的影响，探究高强钢筋与高强混凝土的机械锚固性能。
[Abstract]:The application of high strength steel bar and high strength concrete can save energy and resources, promote the development and reform of construction industry, promote the development of economy and society in our country. The Anchorage between reinforcement and concrete is an important reason why the two materials can work together to bear the load together. Anchorage is the basic condition for the bearing force of reinforced concrete structures, and the study of anchoring mechanism is also a basic problem in the theoretical study of reinforced concrete structures. At present, there have been many theoretical and experimental studies on the anchoring of common materials, and some related norms have been issued. However, the research on the anchoring of high strength materials is still very few, which involves the application and development of high strength materials. How to reduce the length of anchoring and optimize the existing Anchorage theory has become more and more important. In this paper, the bonding anchoring and mechanical anchoring between high strength concrete and high strength steel bar are studied. The bonding and anchoring characteristics of high strength steel bar and high strength concrete are summarized, and the influence of different factors on anchoring performance is explored. In this paper, the mix ratio of C80 concrete is obtained by using the local building materials of Tianjin, and the concrete mix ratio of C80 concrete is obtained. On this basis, 33 drawing specimens are designed, which consider the strength of concrete, the diameter of steel bar and the thickness of protective layer, respectively. The effect of anchoring length and hoop ratio on the bond anchoring strength is studied, and the bonding and anchoring properties of high strength steel bar and high strength concrete are investigated, and the strength of concrete, the diameter of steel bar and the thickness of protective layer are considered respectively through 33 drawing specimens. The influence of anchoring length and hoop ratio on mechanical Anchorage strength is discussed. The mechanical anchoring performance of high strength steel bar and high strength concrete is studied.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU375

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