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对地震时作为多层建筑抗弯钢架能量耗散构件的薄壁冷弯型钢(CFS)进行了试验研究。试验采用6个螺栓连接的梁-柱节点,在连接区域的板件和梁的翼缘上使用不同的出平面加劲肋。CFS连接件的滞后性能表明其具有较高的耗能能力和足够的延性,满足抗震设计规范的要求。在连接区域的钢梁内使用出平面加劲肋,能够提高连接件的弯矩-转角特性,强度提高35%,延性提高75%。弹性周期后连接件的滑动使其具有较好的滞回性能,能量耗散能力提高了240%。连接件试样可以作为刚性连接,其全部或部分强度取决于连接加劲肋。
The test of thin-walled cold-formed steel (CFS) as an energy-dissipating component of multi-story flexural steel frame during earthquake was carried out. The test uses six bolted beam-column joints, using different out-of-plane stiffeners on the flanges of the plate and beam in the connection area. The hysteresis behavior of the CFS connector indicates its high energy dissipation capacity and sufficient ductility to meet the seismic design code requirements. The use of flat stiffeners in the steel girder in the connection area increases the moment-angle characteristics of the joint with a 35% increase in strength and a 75% increase in ductility. The sliding of the connector after the elastic period gives it better hysteretic performance and an increase of 240% in energy dissipation. The connector specimens can be rigid connections, all or part of their strength depending on the connection of the stiffeners.