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首页> 外文期刊>Journal of Constructional Steel Research >Investigation of composite action on seismic performance of weak-axis column bending connections
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Investigation of composite action on seismic performance of weak-axis column bending connections

机译：复合作用对弱轴柱弯曲连接抗震性能的影响研究

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This paper presents a developed beam-to-column connection which is suitable for weak axis of I-section column and H-shaped beam. Ten cruciform joint specimens, including five bare steel joint specimens (SJ) and five composite joint specimens (CJ) reinforced with partial shear connection, were tested under reversal of loads to evaluate the effect of composite action on the developed weak-axis connections. The beam ends were designed with standard, RBS, cover-plate, taper flange, and welded haunch respectively. The experimental results are analyzed and the composite action is discussed based on the test data. Overall, most joints failed due to welding fracture at the conjunction of diaphragm, skin plate and beam-end flange. But relatively speaking, the composite specimens performed well and achieved the story drift ratios of 0.04 rad before experiencing 20% strength degradation because only slight strength degradation occurred in the composite joints compared to bare steel joints, thus the composite joints have,a more stable bearing capacity. The test data clearly illustrate that the neutral axis shifted upward significantly under positive bending, resulting in larger strains on beam bottom flange. The reinforcing bars in concrete slab did not work well, but remained in elastic state. The slab slippage was negligible even in 50% degree partial shear connection. The welding quality is an important guarantee to avoid the brittle failure of the connections, and lamellar tearing resistant steel is suggested to be used in skin plate. (C) 2016 Published by Elsevier Ltd.
机译：本文提出了一种改进的梁到柱连接，适用于I型截面柱和H形梁的弱轴。在荷载反向作用下测试了十个十字形接头试样，包括五个用部分剪力连接加固的裸钢接头试样（SJ）和五个复合接头试样（CJ），以评估复合作用对已开发的弱轴接头的影响。梁的末端分别设计有标准，RBS，盖板，锥形法兰和焊接斜头。分析了实验结果，并根据试验数据讨论了复合作用。总体而言，大多数接头是由于隔膜，蒙皮板和梁端法兰连接处的焊接断裂而失效。但是相对而言，复合材料试样表现良好，在经历20％的强度下降之前达到了0.04 rad的层间位移比，这是因为与裸钢接头相比，复合材料接头仅发生了轻微的强度下降，因此，复合材料接头具有更稳定的承载力容量。测试数据清楚地表明，在正向弯曲下，中性轴显着向上移动，从而在梁底部法兰上产生更大的应变。混凝土板中的钢筋不能很好地工作，而是保持弹性状态。即使在50％度的局部剪切连接中，板坯的滑移也可以忽略不计。焊接质量是避免连接脆性破坏的重要保证，建议在薄板上使用层状抗撕裂钢。 （C）2016由Elsevier Ltd.出版

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