高剪跨比下新型叠合剪力墙抗震性能试验研究

Experimental Study on Seismic Performance of New Stacked Shear Wall Under High Shear Span Ratio

新型叠合剪力墙与传统叠合剪力墙相比具有减少预制工序、提高施工效率的特点。为了研究这种新型叠合剪力墙在高剪跨比条件下的抗震性能,设计制作了两个足尺的剪跨比为2.8的剪力墙试件,通过拟静力试验研究新型叠合剪力墙在往复荷载下的滞回性能、耗能能力、刚度特性、承载力和延性性能。试验结果表明:在剪跨比为2.8时新型叠合剪力墙的破坏形态与现浇剪力墙相同,均为弯剪型破坏;新型叠合剪力墙的极限位移在1/44~1/35之间,变形能力符合规范要求;其刚度退化特性、耗能能力和延性性能均与现浇剪力墙相近,整体的抗震性能能够达到“等同现浇”的效果。

The new stacked shear wall has the characteristics of reducing prefabrication process and improving construction efficiency compared with the traditional stacked shear wall.In order to study the seismic performance of this new type of stacked shear wall under high shear span ratio conditions,this paper designs and produces two foot⁃scale shear wall specimens with a shear span ratio of 2.8,and investigates the hysteresis,energy dissipation,stiffness,load carrying capacity,and ductility of this new type of stacked shear wall under reciprocating loads through the proposed static tests.The test results show that the damage pattern of the new stacked shear wall is the same as that of the cast⁃in⁃place shear wall when the shear span ratio is 2.8,which is a bending⁃shear type of damage;the ultimate displacement of the new stacked shear wall is between 1/44 and 1/35,and the deformation capacity is in accordance with the specification requirements;its stiffness degradation characteristics,energy dissipation capacity,and ductility performance are all similar to those of the cast⁃in⁃place shear wall.The overall seismic performance can achieve the effect of“equivalent to cast⁃in⁃place”.