上部边框柱外移时搭接柱转换结构的试验研究

Experimental Study on Vertical Load Conversion Bracket of the Upper Column Outsides the Low Column

通过一个缩尺比例约为1∶4的搭接柱转换结构模型试验,研究了搭接柱的传力机制、变形特征以及转换搭接柱上、下层梁的受力特点。研究表明,转换搭接柱刚度极大,上部竖向荷载以桁架模型传至下层柱,是良好的竖向荷载转换形式。转换层上层梁偏心受拉,下层梁偏心受压,能有效抵抗上部柱子轴力所形成的偏心弯矩。在总结了搭接柱转换结构各组成部分的受力变形特征后,提出了相应的设计建议。

Based on the experimental results of one 1/4-scaled test of conversion column bracket, force transfer mechanism and deformation characteristic are studied and mechanical properties of floor beams at both upper and lower the conversion column bracket axe presented. Research shows that conversion column bracket has enormous rigidity and the vertical load is transferred down to lower column by truss mechanism, which means the bracket is a good way for vertical load conversion. The upper floor beam is in tension and the lower is in compression, which gives efficiency to hold up the overturning moment caused by the out-drift vertical load. Comprehensive discussions on all parts of conversion column bracket have been made and corresponding suggestions for design have been recommended.