摘要
为研究矿物掺合料对混凝土抗震性能的影响,文中选用粉煤灰和矿粉制备混凝土柱,测试混凝土柱在反复荷载作用下滞回特性、刚度退化、耗能能力以及相对残余变形等变化。结果表明,与普通混凝土柱相比,掺杂粉煤灰会降低混凝土柱承载力8.22%,但掺杂粉煤灰会改善混凝土柱的脆性、刚度、耗能能力和自复位能力,其刚度、等效黏滞阻尼系数和相对残余变形分别提升29.98%、22.56%和21.74%;表明掺杂粉煤灰可以有效改善混凝土柱破坏程度,改善混凝土柱的抗震性能。
In order to study the effect of mineral admixtures on the seismic performance of concrete,fly ash and mineral powder were used to prepare concrete columns.The hysteretic characteristics,stiffness degradation,energy dissipation capacity and relative residual deformation of concrete columns were tested under repeated loads.The results show that compared with ordinary concrete columns,doped fly ash can reduce the bearing capacity of concrete columns by 8.22%,but doped fly ash can improve the brittleness,stiffness,energy dissipating capacity and selfrepositioning ability of concrete columns.The stiffness,equivalent viscosity damping coefficient and relative residual deformation of concrete columns increase by 29.98%,22.56%and 21.74%,respectively.It shows that doped fly ash can effectively improve the damage degree of concrete column and improve the seismic performance of concrete column.
作者
余若飞
YU Ruofei(Guizhou Engineering Vocational College)
出处
《广东建材》
2025年第8期5-9,共5页
Guangdong Building Materials
关键词
混凝土柱
抗震性能
矿物掺合料
损伤分析
Concrete column
Seismic performance
Mineral admixture
Damage analysis
