摘要
为保证建筑结构在震动中的安定性,对影响混凝土阻尼性能的因素进行了分析,考察了纤维筋混凝土纵向配筋率、筋材类型、箍筋间距和构件尺寸等因素对混凝土阻尼性能的影响。通过悬臂梁自由振动装置和三点弯曲梁式大尺寸材料阻尼测试装置对纤维筋混凝土阻尼比和损耗因子的测定,结果表明,阻尼比和损耗因子都可以表征混凝土构件的阻尼性能,纵向配筋率在0.9%以上时对混凝土阻尼性能影响不大,混凝土阻尼性能的提高随着箍筋间距的缩小和筋材表面粗糙度的增大以及加载频率的降低而增大,而构件尺寸则对混凝土阻尼性能影响不大。
To ensure the stability of buildings structure in shocking, effecting factors of concrete damping property are analysed, the influence of longitudinal reforcement ratio of fiber reinforced concrete, reinforcing types, stirrup spacing and dimension of component on concrete damping property is studied. The damping ratio of fiber reinforced concrete and damage factor are tested by free vibration cantilever device and damping test device for three-point dynamic bending dimension material, the results show that the damping property could be characterized by damping ratio and loss factor, the damping property kept steady when longitudinal reinforcement ratio reaches 0.9%, damping property of concrete increases with decreased the stirrup spacing and increased the surf＇ace roughness, and decreased load frequency, dimension of component has little effect on damping property.
出处
《混凝土与水泥制品》
2015年第11期58-61,共4页
China Concrete and Cement Products
基金
乐山科技局项目(14GZD045)
