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首页> 外文会议>International Conference on Civil Engineering,Architecture and Building Materials >Experimental Study on Seismic Behavior of Cold-formed Square Tube Beam-column Connection with Welded Haunch
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Experimental Study on Seismic Behavior of Cold-formed Square Tube Beam-column Connection with Welded Haunch

机译：冷成型方管束柱连接与焊接摇头柱柱柱连接的试验研究

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The cold-formed thin-walled tube has been widely applied in high seismic fortification intensity region and post-seismic reconstruction area because of light quality, high strength and small deformation. But the connection mode and mechanical properties of beam-column connections still need further study. According to the "strong column and weak beam" seismic design principle and the thinking of control the position of plastic hinge, adding haunch slabs at the end of beam to reduce the number of repeated welding and avoid brittle fracture. Through the low cyclic loading experiment, four beam-column connections with welded haunch under different axial compression ratios have been studied, and connection's hysteretic performance, energy-dissipating capacity, bearing capacity, rigidity and failure mode have been discussed. The result shows that: 1) the ultimate bearing capacity of connection with welded haunch is much great, and the energy dissipation capacity is very well, which can make this connection to absorb and consume great energy in earthquake. This connection can meet the need of seismic design very well. 2) The connection with welded haunch experiences much cycling time, has long yield platform after yield, has great cumulative energy-dissipatmg capacity and well ductility. 3) the final destruction of connection with welded haunch is caused by the beam's local buckling. And the yield surface is almost located at the outside of connections. 4) The axial compression ratios has great effect on the hysteretic performance, bearing capacity and stiffness degradation for the connection with welded haunch.
机译：冷弯薄壁管已广泛应用在高抗震强度区域和后地震重建区域由于质量轻，高强度和变形小。但连接模式和梁柱连接的机械性能仍需要进一步的研究。据“强柱弱梁”抗震设计原理和控制塑性铰位置的思想，在梁的端部加腋的板坯，以减少重复焊接的次数和避免脆性断裂。通过低循环加载实验中，采用焊接腋下不同的轴向压缩比4梁柱连接进行了研究，并连接的滞回性能，能量耗散能力，承载能力，硬度和破坏模式进行了讨论。结果表明：1）焊接后臀尖连接的极限承载力是非常巨大的，和耗能能力是非常好，它可以使这个连接吸收和消耗地震能量很大。这种连接能满足抗震设计的需求非常好。 2）焊接后臀尖的连接遇到很多骑自行车的时候，有屈服后长屈服平台，具有巨大的累积能量，dissipatmg能力和良好的延展性。 3）用焊接的腋连接的最终破坏是由射束的局部压曲引起的。和屈服表面几乎位于连接的外部。 4）的轴向的压缩比对迟滞性能承载能力用于与焊接腋连接很大的影响，和刚度退化。

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