塑钢纤维轻骨料混凝土短柱轴压性能试验研究

Experimental Research on Axial Compression Performance of Plastic-Steel Fiber Reinforced Lightweight Aggregate Concrete Short Columns

对18根塑钢纤维轻骨料混凝土短柱和2根轻骨料混凝土短柱进行轴压性能试验,研究塑钢纤维掺量、轻骨料混凝土强度、纵向钢筋配筋率和试件高宽比对塑钢纤维轻骨料混凝土短柱轴压性能的影响。结果表明:随着塑钢纤维掺量的增加,试件的承载力略有提高,延性提升较大,且塑钢纤维掺量为9 kg/m3时,试件的承载力和延性最大;随着轻骨料混凝土强度和纵向钢筋配筋率的提高,试件承载力均增大,但试件延性均逐渐降低;试件高宽比对试件承载力影响不大,当试件高宽比为3时,试件的延性最好。

Axial compression test on 18 plastic-steel fiber reinforced lightweight aggregate concrete short columns and 2 lightweight aggregate concrete short columns was carried out to research the influence of plastic-steel fiber content,lightweight aggregate concrete strength,longitudinal reinforcement ratio and specimen height-width ratio on axial compression performance of short columns.The results show the bearing capacity of the specimen is slightly improved and the ductility is improved greatly with the increase of plastic-steel fiber content and when the plastic-steel fiber content is 9 kg/m^3,the bearing capacity and ductility of the specimen are the greatest;that with the increase of lightweight aggregate concrete strength and longitudinal reinforcement ratio,the bearing capacity of the specimen increases,but the ductility of the specimen slightly decreases;and that the specimen height-width ratio has little effect on the bearing capacity of the specimen,and the ductility of the specimen is the best when it is 3.