钢管混凝土斜柱抗剪环-环梁节点抗震性能试验

为满足建筑造型中设置钢管混凝土斜柱的要求,在结构中形成了钢管混凝土斜柱与环梁相交的抗剪环-环梁节点。检验这种斜柱抗剪环-环梁节点的抗震性能,进行了2个2/3缩尺比例的钢管混凝土斜柱抗剪环-环梁梁柱组合体的低周反复加载试验。试验结果表明,通过对环梁的合理配筋构造,即使试件最终破坏发生在环梁内,仍能够使组合体具有足够的变形能力和耗能能力;由于钢管混凝土斜柱与环梁节点承载能力相对独立,即使环梁最终发生破坏,对钢管混凝土斜柱的纵向承载力也不致造成较大影响。

Study on Seismic Behavior of Declining Steel Tube Confined Concrete Column Shear Ring-ring Beam Joint in Cyclic Loading

To meet the requirement of architectural image,it is necessary to build the declining column of steel tube and confined concrete.As a consequence,shear ring-ring beam joint is formed at the intersection of declining column and ring beam.2/3 scale model of the combination of declining column and ring beam was used to test the anti-seismic performance of this joint under cyclic loading.The experimental results indicate that the combination with reasonable design has sufficient deformation and energy dissipation capacity even if the wreck occurred on the ring beam.Due to the independent loading capacity of declining column and the ring beam joint,the wreck on the ring beam joint does not have significant influence on the longitudinal loading capacity of the declining column.