外露式钢柱脚受剪性能试验研究

发布时间：2018-04-27 03:21

本文选题：外露式柱脚 + 锚栓　；参考：《建筑结构学报》2017年07期

【摘要】：以轴力和锚栓数量及其布置形式为参数,对4个外露式钢柱脚试件进行了水平往复加载试验,对其受剪性能及受剪机制进行分析。当柱脚所受轴力为压力时,柱脚的剪力由其与基础顶面间的静摩擦力传递给基础,且柱脚弯矩对其受剪承载力有提高作用。当柱脚所受轴力为拉力时,柱脚底板与基础表面间分离,柱脚在水平荷载作用下发生滑移,此时锚栓参与承担水平力,但其承担水平力的能力较小。柱脚受弯承载力随着柱脚锚栓数量的增加而增大。当锚栓数量从4个增加到6个时,柱脚受弯承载力增加了12%,耗能能力增加了20%。配置相同数量锚栓柱脚的滞回行为随着锚栓布置方式的不同也有所改变。将锚栓布置在沿加载方向的最外侧时,可以最大程度地利用每个锚栓的承载力。因此,在设计外露式柱脚时需要考虑锚栓布置方式,以便充分利用锚栓的受拉性能。
[Abstract]:Based on the axial force, the number of anchor bolts and their layout, the horizontal reciprocating loading tests were carried out on four exposed steel column foot specimens. The shear behavior and shear mechanism of the specimens were analyzed. When the axial force of the column foot is under pressure, the shear force of the column foot is transferred from the static friction between the column foot and the top plane of the foundation to the foundation, and the bending moment of the column foot can improve the shear bearing capacity of the column foot. When the axial force on the foot of the column is tension, the bottom plate of the column is separated from the surface of the foundation, and the foot of the column slips under horizontal load. The anchor bolt takes part in the horizontal force, but its ability to bear the horizontal force is relatively small. The flexural capacity of column foot increases with the increase of anchor bolt number. When the number of anchors increased from 4 to 6, the flexural capacity of the column foot increased by 12 and the energy dissipation capacity increased by 20. 5%. The hysteretic behavior of the same number of bolted foot varies with the arrangement of anchor bolt. When the bolt is arranged at the outermost side along the loading direction, the bearing capacity of each bolt can be maximized. Therefore, in order to make full use of the tensile performance of the anchor bolt, it is necessary to consider the arrangement of the anchor bolt in the design of the exposed column foot.
【作者单位】：大连理工大学海岸与近海工程国家重点实验室;
【基金】：国家自然科学基金青年基金项目(51208076) 中央高校基本科研业务费专项课题(DUT14LK04)
【分类号】：TU391

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