楼板厚度对蜂窝组合梁柱节点抗震性能的影响

发布时间：2018-05-18 18:14

本文选题：蜂窝组合梁 + 节点　；参考：《沈阳建筑大学学报(自然科学版)》2017年06期

【摘要】：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.
[Abstract]:Aim to study the influence of floor thickness on seismic behavior of honeycomb composite Liang Zhu joints under earthquake, and to provide theoretical basis for the design of honeycomb composite structure in floor thickness. Methods experiments were carried out on the honeycomb composite Liang Zhu joints with hexagonal openings (opening ratio 70). The mechanism and failure form of plastic hinges under low cycle reciprocating loads were analyzed and the finite element simulation was carried out. The hysteretic performance of five honeycomb composite Liang Zhu joints with different floor thickness is compared and analyzed. Results the plastic hinge can be fully removed to the honeycomb hole with the opening ratio of 70 and the slab thickness of 90 mm. The increase of floor thickness not only improves the stiffness and bearing capacity of the joint, but also increases the yield displacement. Ductility and energy dissipation capacity, but when the thickness of the slab reaches 90 mm, the stiffness and bearing capacity of the floor are not obviously improved, and the stiffness degradation of each specimen is close, and the stiffness degradation is more obvious after the specimen yield. Conclusion the influence of floor thickness on seismic behavior of honeycomb composite Liang Zhu joints is obvious and plays an important role, and the analysis of seismic performance of honeycomb composite Liang Zhu with different floor thickness provides a reference for the design of honeycomb composite structures.
【作者单位】：沈阳建筑大学土木工程学院;中国石油管道局工程有限公司东北分公司;
【基金】：国家自然科学基金项目(51578346)
【分类号】：TU352.11;TU398.9

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