楼板厚度对蜂窝组合梁柱节点抗震性能的影响

摘要

In order to clarify the influence of thickness of slab on the seismic performance of honeycomb composite beam-column joints with regular hexagon and 70％ porosity to analyze its corrosion mechanism and carry on a finite element simulation.According to this basis,made five cellular composite beam-column joints with different thickness of slab,then analyzed the hysteretic behavior of these joints.The result of the study shows:the composite beam-column joints with 90 mm thickness of slab and 70％ porosity can externally move the plastic hinge to honeycomb holes.The increase of thickness of slab can promote the stiffness and bearing capacity of the slab is not obvious.The degradation of every test specimen is very close and it is more obvious after the test specimen go into yielding situation.%目的 研究地震作用下楼板厚度对蜂窝组合梁柱节点抗震性能的影响,为蜂窝式组合结构设计在楼板厚度方面提供理论依据.方法 对正六边形开孔(开孔率70％)的蜂窝组合梁柱节点进行试验,分析其在低周往复荷载作用下的塑性铰产生机理与破坏形式,并进行有限元模拟;通过建立5个楼板厚度不同的蜂窝组合梁柱节点,对节点的滞回性能进行比较分析.结果 开孔率为70％,楼板厚度为90 mm的蜂窝组合梁柱节点可以将塑性铰充分外移到蜂窝孔处;楼板厚度的增加,不仅提高了节点刚度和承载力,也增加了屈服位移、延性以及耗能能力,但是在楼板厚度达到90 mm以后,楼板的刚度和承载力提高不明显;各试件的刚度退化比较接近,试件进入屈服以后,刚度退化更加明显.结论 楼板厚度对蜂窝组合梁柱节点的抗震性能影响明显,起到非常重要的作用;对不同楼板厚度蜂窝组合梁柱抗震性能的分析,为蜂窝式组合结构设计提供了参考依据.