【摘要】 剪力墙尤其是核心筒剪力墙作为(超)高层建筑的主要抗侧力和承重构件,由于高宽比较小,破坏形式往往为脆性的剪切破坏,地震作用下剪力墙底部损伤严重,震后修复极其困难,修复费用昂贵。因此,为了对高宽比较小的剪力墙进行改善,控制剪力墙的损伤,本文提出一种新型的开缝耗能组合墙,并从承载力、变形能力、耗能能力与破坏形态等方面对比组合墙与传统低矮剪力墙的抗震性能差异。分析结果表明:两者在承载力相差不大的情况下,开缝耗能组合墙的极限位移为低矮剪力墙的3.23倍,延性系数为低矮剪力墙的2.16倍,耗能系数为低矮剪力墙的1.91倍,在破坏形式上也有了明显的转变,由低矮剪力墙的剪切破坏转变为了开缝耗能组合墙的弯曲破坏。更多还原

【Abstract】 Shear walls,especially the shear walls within core tube,as important lateral force resisting elements of( super) high-rise buildings are always damaged from brittle shear failure due to small shear-span ratio,especially earthquake induced serious damage around the bottom and post-seismic rehabilitation is extremely difficult and expensive. Therefore,a new slit composite shear wall( CSW) with dampers is proposed in this paper to control the damages and improve seismic performances of shear walls. The comparative researches between conventional low-rise shear wall and new slit CSW with separating dampers are carried out through bearing capacity,deformation capacity,energy-dissipating capacity and failure mode. The results show,compared with the low-rise shear wall,the peak load of CSW with slit and damper increases by 2. 2%; the ultimate deformation increases by 223%; the ductility factor increases by 116%; the energy dissipation coefficient increases by 91%. The new slit CSW with dampers is destroyed by flexure failure,which is different from the brittle shear failure of low-rise shear wall.更多还原