悬链线效应下钢筋与混凝土黏结锚固性能试验研究

发布时间：2018-03-31 09:36

本文选题：RC框架结构　切入点：悬链线效应　出处：《建筑结构学报》2017年07期

【摘要】：为研究悬链线效应下锚固钢筋与混凝土之间的黏结破坏,以及在RC框架结构连续性倒塌过程中钢筋拉断和黏结失效的先后顺序,分析锚固长度、钢筋布置方式对黏结锚固性能的影响。将钢筋锚固于钢筋混凝土柱中,通过自制的自平衡加载装置,实现对框架结构梁端破坏而钢筋未拉断时形成悬链线受力机制的钢筋进行加载。试验结果表明:锚固钢筋与混凝土之间发生劈裂破坏,而锚固钢筋并没有被拉断,所以在RC框架结构抗倒塌设计中不宜采用直锚的锚固形式,而应该采用其他有效的锚固形式。此外,单排钢筋布置有利于提高锚固钢筋与混凝土之间的平均黏结应力,较双排钢筋布置下的约提高15%。
[Abstract]:Failure between steel and concrete anchorage of catenary under the effect of bonding, as well as in the RC frame structure progressive collapse sequence of reinforced bar and bond failure in the process of analysis of anchorage length, influence of reinforcement arrangement on bond anchorage performance. The anchor bar in reinforced concrete column, through the self balanced loading device. The load on the frame beam end failure and reinforcement is not formed when the tensile stress of the steel catenary mechanism. The experimental results show that the splitting failure occurred between the anchor and anchor bars and concrete, and has not been broken, so in the framework of RC collapse-resistant anchorage form design to be used in direct anchoring, and should be used other effective anchorage forms. In addition, to improve the average bond between the anchor and the concrete stress of single row layout of reinforcement, a double reinforced cloth structure About 15%.

【作者单位】：贵州大学空间结构研究中心;
【基金】：国家自然科学基金项目(51168010)
【分类号】：TU375

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