【摘要】 为了研究型钢高强混凝土剪力墙的抗震性能,对8个剪跨比为2.5的剪力墙试件进行了拟静力试验。通过改变试件的轴压比、配箍特征值和配钢率,研究其在往复水平荷载作用下的破坏机理、滞回性能、变形能力以及耗能能力。试验结果表明,这种剪力墙的破坏形态为墙底部截面约束区混凝土被压碎的弯曲型破坏;试件的滞回曲线饱满,没有明显的捏缩现象;位移延性系数在3.50～4.66之间,并且随着配箍特征值和配钢率的增加,试件的变形能力提高;等效粘滞阻尼比在0.196～0.255之间,试件表现出较好的耗能能力。根据墙体在不同阶段的破坏程度,将型钢混凝土剪力墙结构的性能划分为使用良好、保证人身安全和防止倒塌三个性能水平,提出用位移角作为型钢混凝土剪力墙结构的性能指标,并给出了不同性能水平位移角限值的建议值。更多还原

【Abstract】 To study the seismic behavior of steel high strength concrete(SHSC) structural walls,quasi-static tests of eight specimens were carried out.The shear span ratio of all specimens was 2.5.The failure mechanism,hysteretic behavior,deformability and energy dissipation capacity were analyzed under various axial load ratios,steel ratios and stirrup characteristic values.The experimental results show that the crushing of the concrete at base leads to the failure of walls.The SHSC structural walls exhibit the plump hysteretic characteristics without obvious pinch phenomenon.The displacement ductility coefficient can vary from 3.50 to 4.66.The deformability can be improved by increasing the steel ratio and stirrup characteristic value.The equivalent viscous damping ratio varying from 0.196 to 0.255 satisfies the seismic design requirements.According to the damage level,the performance of steel reinforced concrete wall buildings can be divided into three levels,namely serviceability,life-safety and collapse-prevention.The displacement ratio is used as the index governing the performance level.The proposed values are provided.更多还原