钢纤维部分增强混凝土剪力墙延性及耗能性能试验研究

Experimental Study of Steel Fiber Partially Reinforced Concrete Shear Wall

通过4片高宽比为1:1的剪力墙试件和4片高宽比为2:1的剪力墙试件的低周反复荷载试验,研究了在低周反复荷载作用下,钢筋钢纤维部分增强混凝土剪力墙的整体工作性能、滞回特性、延性和耗能性能,并计算了试件的延性系数和能量耗散系数.结果表明,在混凝土中加入钢纤维使开裂后滞回环下降段变得平缓,滞回环面积增大,明显改善剪力墙的延性及耗能能力,随着钢纤维混凝土层高的增加,剪力墙的延性和耗能能力得到显著提高.

The whole working performance,failure form and the hysteretic behavior of steel fiber partially reinforced concrete shear walls were studied,through the horizontal cyclic load tests of four shear walls with the aspect ratio 1∶1 and four shear walls with the aspect ratio 2∶1.The ductility factor and the dissipative coefficient of these specimens were correctly calculated.The results indicated that the declining segments of hysteretic circles after crack became mild,and the areas of the hysteretic circles increased with the increase of steel fibers.The properties of ductility and dissipation behaviors were improved.With the increase of the thickness of steel fiber reinforced concrete,the properties of ductility and the dissipation behaviors of the shear walls increased greatly.