摘要
为了研究地聚合物混凝土柱的抗震性能,采用拟静力试验方法对3个地聚合物混凝土柱和1个普通硅酸盐混凝土柱的抗震性能进行了试验研究。试验中考虑了不同的地聚合物混凝土强度等级和轴压比,对比分析了柱子的破坏形态、滞回曲线、骨架曲线、位移延性、耗能能力以及刚度退化等各项抗震指标,并通过规范公式计算了地聚合物混凝土柱的承载力。试验结果表明:地聚合物混凝土柱的破坏形态和普通硅酸盐混凝土柱基本相似,主要表现为压弯破坏;试件的滞回曲线十分饱满,滞回曲线呈现为梭型;地聚合物混凝土随着混凝土等级的提升和轴压比的增大,滞回曲线的形状变得更加饱满,抗震性能得到提高;破坏时等效阻尼系数介于0.220~0.274之间;地聚合物混凝土柱的承载力可采用普通混凝土规范公式进行较好的计算。研究结果可为地聚合物混凝土结构的进一步推广和应用提供参考。
In order to study the seismic behavior of geopolymer concrete columns,three geopolymer concrete columns and one ordinary silicate concrete column were tested by quasi-static test.Different strength grades and axial compression ratio of geopolymer concrete were considered in the test,and the seismic indexes such as failure form,hysteresis curve,skeleton curve,displacement ductility,energy dissipation capacity and stiffness degradation of the column were compared and analyzed,and the bearing capacity of the geopolymer concrete column was calculated by the standard formula.The results show that the failure mode of geopolymer concrete column is similar to that of ordinary silicate concrete column,and the main failure mode is compressive bending.The hysteresis curve of the specimen is very full,and the hysteresis curve shows spindle shape.With the increase of concrete grade and axial compression ratio,the shape of hysteresis curve becomes fuller and the seismic performance is improved.The equivalent damping coefficient at failure is between 0.220 and 0.274.The bearing capacity of geopolymer concrete column can be well calculated by the standard formula of ordinary concrete.The results can provide reference for the further popularization and application of geopolymer concrete structures.
作者
范云蕾
肖遥
周泉
FAN Yunlei;XIAO Yao;ZHOU Quan(College of Civil Engineering,Central South University of Forestry and Technology,Changsha 410004,China;China Construction Fifth Engineering Bureau Co.,Ltd.,Changsha 410004,China)
出处
《建筑结构》
北大核心
2023年第S01期790-795,共6页
Building Structure
关键词
地聚合物混凝土柱
抗震性能
拟静力试验
geopolymer concrete column
seismic behavior
quasi-static test
