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李鹏飞,陈宸,何世钦*.多铰联动加载装置对钢筋销栓作用承载性能的影响[J].实验力学,2018,33(3):428~434
多铰联动加载装置对钢筋销栓作用承载性能的影响
The influence of multi-hinge linkage loading device on the bearing performance of dowel action of reinforcing bar
投稿时间: 2017-03-12  最后修改时间: 2017-05-30
DOI:10.7520/1001-4888-17-058
中文关键词:  多铰联动加载装置  钢筋销栓作用  承剪性能
英文关键词:multi-hinge linkage loading device  dowel action of reinforcing bar  shear performance
基金项目:北京市教育委员会科技计划面上项目KM201710009010
作者单位
李鹏飞 重庆交通大学 港口航道与海岸工程系, 重庆 400074 
陈宸 北方工业大学 土木工程学院, 北京 100144 
何世钦* 北方工业大学 土木工程学院, 北京 100144 
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中文摘要:
      国内外学者针对钢筋的销栓作用开展了较多的研究,但采用钢筋直接剪切试验方法的研究较少,难以获取钢筋变形和混凝土破损的直观数据。主要是由于加载装置复杂,荷载边界条件难以模拟。本文针对钢筋销栓作用的剪切承载性能试验方法中存在的问题,设计了可同时进行竖向与水平双向加载的直接剪切试验方法,研究了作动器、竖向连接件与钢筋夹具的连接方式对试验结果的影响,并对试验误差的原因进行了分析。试验结果表明,采用本文提出的多铰联动的加载装置,水平方向可对钢筋施加轴向约束,竖直方向可以始终保证垂直钢筋施加荷载,并能有效地消除因作动器自身刚体位移所造成的试验误差,能够真实地反映出钢筋销栓作用的承载性能,可为钢筋销栓作用试验研究中的试验装置设计提供参考。
英文摘要:
      Scholars at home and abroad have carried out a series of study about dowel action of reinforcing bar. But the direct shear experimental method of steel bar is less adopted. It is mainly due to the complexity of loading device that it is difficult to simulate the load boundary conditions. In this paper, aiming at the problems in experimental method of shear bearing performance of reinforcing bar dowel action, a direct shear experimental method for both vertical and horizontal loading at the same time is designed, the influence of actuator, vertical connector and reinforcing bar clamp on the experimental results is studied, and the causes of experimental errors are analyzed. Experimental results show that the multi-hinge linkage loading device proposed in this paper can apply axial restraint to reinforcing bar along horizontal direction, and along vertical direction can keep vertical reinforcement load. So it can effectively eliminate experimental errors due to actuator's rigid body displacement and reflect the real bearing capacity of reinforcing bar dowel action. It provides the reference for the design of experimental device in experimental study of reinforcing bar dowel action.
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