纤维对粉煤灰再生空心墙体抗震性能的影响研究

Research on the Influence of Fibers on the Seismic Performance of Fly Ash Recycled Hollow Walls

为了研究添加粉煤灰的再生混凝土墙体的抗震性能,通过对粉煤灰再生混凝土空心剪力墙进行拟静力加载试验,得到墙体在开始受力至产生形变期间,所受力与位移的关系,对比添加无纤维、聚丙烯纤维和聚丙烯-钢混合纤维制成混凝土相应的滞回曲线、骨架曲线、刚度退化曲线等。结果表明,使用添加混合纤维的粉煤灰的再生混凝土而制成的墙体具有刚度大、自重轻、抗震性能良好等优势,符合抗震要求,说明了添加粉煤灰的再生混凝土大空心墙体可以应用于普通低矮建筑中。

In order to study the seismic performance of recycled concrete walls with added fly ash,quasi-static loading tests were conducted on a fly ash recycled concrete hollow shear wall.The relationship between the force and displacement of the wall from the beginning of stress to deformation was obtained.The corresponding hysteresis curves,skeleton curves,stiffness degradation curves,etc.of concrete with the addition of non fiber,polypropylene fiber,and polypropylene steel mixed fiber were compared.The results indicate that the walls made of recycled concrete with added mixed fiber fly ash have advantages such as high stiffness,light weight,and good seismic performance,which meet the seismic requirements.This indicates that the recycled concrete large hollow walls with added fly ash can be applied to ordinary low rise buildings.