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首页> 外文期刊>Engineering Structures >Exploratory study of adopting longitudinal column reinforcement details as a design-controllable tool to seismic behavior of exterior RC beam-column joints
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Exploratory study of adopting longitudinal column reinforcement details as a design-controllable tool to seismic behavior of exterior RC beam-column joints

机译：采用纵向柱钢筋细节作为外部RC梁柱节点抗震性能的设计可控制工具的探索性研究

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摘要

This study presents the test results of seven exterior beam-column joints with different longitudinal reinforcement details for the columns. The test program included a beam-column joint designed to serve as a control specimen, in which column reinforcement was continuous ribbed steel bars. The other six specimens were divided into two groups, three specimens for each group. In the first group, the longitudinal column reinforcement was detailed with well-confined lap-splice longitudinal bars: two specimens were reinforced with lap-splice deformed steel bars and the later was with lap-splice plain steel bars. The same reinforcement details were used for the second group but additional longitudinal basalt fiber reinforced polymer (BFRP) rebars were placed at the joint and extended to the upper and lower columns. The test results showed that splicing the longitudinal column reinforcement successfully reduced the contribution of the joint to the deformability of the beam-column joint. Furthermore, adding BFRP rebars to the beam-column joint could be applied as damage controllable bars reducing both the damage level at the serviceability state and the shear deformability of the joint up to failure. A sole strut resistant mechanism was realized by the joints of all test specimens detailed with lap-spliced longitudinal column reinforcement. Ultimately, the test results point to a probability to the renunciation of the ACI 318-11 requirements for splicing longitudinal column reinforcement at column mid-height.
机译：这项研究给出了七个不同纵筋细节的外部梁柱节点的测试结果。测试程序包括设计为用作控制样本的梁柱节点，其中柱钢筋为连续的肋筋。其他六个标本分为两组，每组三个标本。在第一组中，纵向柱的钢筋由密密麻麻的搭接纵向钢筋制成：两个试样由搭接变形的钢筋加固，而后一个则由搭接普通钢筋加固。第二组使用相同的钢筋细节，但在接头处放置了额外的纵向玄武岩纤维增强聚合物（BFRP）钢筋，并延伸至上下柱。试验结果表明，纵筋纵梁的拼接成功减少了节点对梁柱节点变形的影响。此外，将BFRP钢筋添加至梁柱节点可作为可控制破坏的节点使用，从而减少了在可使用状态下的破坏程度以及直至破坏的节点的剪切变形能力。所有测试样品的接缝处均采用搭接式纵柱加固，从而实现了唯一的抗支撑机制。最终，测试结果表明有可能放弃ACI 318-11在立柱中部高度拼接纵立柱钢筋的要求。

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