带有钢槽阻尼器的梁柱节点滞回性能研究

Hysteretic Performance of Beam-to-Column Joints with Slit Dampers

结构中最危险部位通常出现在梁柱节点处,在地震作用下,该处会因不能够吸收地震能量,而产生过大局部屈曲,造成严重后果.基于以上考虑,本文提出了一种新型的钢槽阻尼器抗震(SSD)设计,它是由宽翼缘截面型钢在腹板位置按照一定要求切割出一些缝隙制作而成的,并将其连接在梁的下翼缘上.这种结构有良好的滞回性能,耗能能力强.此外,受荷时节点的主要变形和能量消耗均集中在钢槽阻尼器上.为了研究钢槽阻尼器的存在对梁柱节点滞回性能的影响,用有限元软件ABAQUS对4个梁柱节点模型进行了分析.研究发现,钢槽阻尼器能有效的改善梁柱节点的滞回性能,有利于节点抗震.之后,对钢槽阻尼器节点进行参数分析,参数主要包括钢槽的宽度B和高度l0.通过参数分析,得出参数的影响规律.

The beam-to-column joints are generally the most dangerous parts of a structure. When an earthquake occurs, significant local buckling will form at the joints when the seismic energy can not be absorbed, which results in serious consequences. Based on the above considerations, this paper proposes a new energy-dissipated model- steel slit damper （SSD）, which is fabricated from a standard structural wide-flange section with a number of slits cut from the web and then is connected to the bottom flange of the beam. This design can behaviour and energy dissipation capacity. In addition, when the cyclic loads are applied to provide good hysteretic the system, the energy dissipation and plastic deformation are only focused on the slit dampers. To study the effect of the steel slit dampers on the hysteretic behaviour of the beam-to-column connection, four beam-to-column connections models are ana- lysed by using the finite element software ABAQUS. The results indicate that, it is effective to improve the hysteret- ic performance of the beam-to-column connection, due to the steel slit damper. Therefore, anti-seismic behaviour of the connection is enhanced. Thereafter, a parametric study, considering the width of the slit damper B and the height of the slit damper 10, is carried out and the effect of parameters on the beam-column connection is obtained.