保温层贯通型复合剪力墙抗震性能试验研究

Experimental Study on Seismic Behavior of Insulation Layer Through Composite Shear Wall

为研究保温层贯通型复合剪力墙的抗震性能,进行了4个1/2比例缩尺剪力墙试件在低周往复荷载作用下的静力试验,包含3个复合墙试件和1个实心墙对比试件.对比分析了各试件破坏特征、滞回性能、承载能力、延性、刚度退化及耗能能力等抗震指标,并给出了保温层贯通型复合剪力墙受剪承载力计算公式.试验结果表明,复合墙与实心墙的破坏形态均为弯剪破坏;复合墙在拉结筋作用下两侧墙片协同工作性能较优,滞回性能、承载能力、刚度退化性能等与实心墙相近,变形和延性性能优于实心墙;U型筋间距加密,起到延缓复合墙开裂的作用,但对承载力影响不大;中间保温层厚度加大,使复合墙承载力下降,但对变形及耗能能力未产生不利影响;复合墙开裂荷载出现较早,在实际工程中宜采取防止墙体开裂的措施.

In order to study the seismic behavior of insulation layer through composite shear wall,quasi-static tests of four 1/2 scaled shear wall specimens were tested under low-cyclic reversed loading,including three composite wall specimens and one solid wall contrast specimen.The failure characteristics,hysteretic performance,bearing capacity,ductility,stiffness degradation and energy dissipation capacity of the specimens are compared and analyzed,and the calculation formula of the shear bearing capacity is given.The test results indicate that the failure modes of the composite shear wall and the solid wall are all bending-shear failure.Under the action of tie bars,both sides of the composite wall has better cooperative working performance,similar hysteretic performance,bearing capacity and stiffness degradation performance with solid wall,also its deformation and ductility performance were better than that of solid wall.The U-shaped reinforcement spacing is densified to delay the cracking of the composite wall,but it has little effect on the bearing capacity.With the increase of the thickness of the intermediate insulation layer,the bearing capacity of the composite wall decreases,but the deformation and energy dissipation capacity were not affected.The cracking load of composite wall appears earlier,so the measures to prevent wall cracking should be taken in practical engineering.