摘要
通过对不同纤维含量下的钢-PVA纤维混凝土现浇梁柱节点低周反复载荷试验,得到混杂纤维混凝土试块立方体抗压强度、结构骨架曲线以及延性系数等指标。基于唯象学理论并由试验结果可知:混杂纤维可以有效提高混凝土的承载极限和峰值后应变能;对比单一钢纤维混凝土试件,钢-PVA纤维混凝土试件的骨架曲线在峰值载荷后下降趋于平缓,且PVA纤维对改善节点塑性变形和抗损伤能力效果明显;混杂纤维体积分数在2%左右,钢与PVA配合比为2∶3时纤维混凝土试件可获得更优的抗震性能。
Through the low cyclic load test of steel-PVA fiber concrete cast-in-place beam and column joints under different fiber content,the compressive strength of the hybrid fiber concrete cube,the structural skeleton curve and the ductility coefficient of the test specimen were obtained.Based on the phenomenological theory and the experimental results,it could be concluded that the hybrid fiber can effectively improve the bearing limit and post-peak strain energy of concrete;compared with the single steel fiber reinforced concrete specimen,the skeleton curve of the steel-PVA fiber reinforced concrete specimen decreases gradually after the peak load,and the PVA fiber has an obvious effect on improving the plastic deformation and anti-damage ability of the joints,and it is also suggested that when the volume fraction of hybrid fiber is about 2%and the ratio of steel to PVA is 2∶3,the fiber concrete specimens can obtain better seismic performance.
作者
钟晨
胡元超
朱旭峰
ZHONG Chen;HU Yuanchao;ZHU Xufeng(College of Urban Construction,Anhui Xinhua University,Hefei 230088,China;Key Laboratory of Building Structure of Anhui Higher Education Institute,Anhui Xinhua University,Hefei 230088,China;Anhui No.1 Electric Power Construction Co.,Ltd.,China Energy Engineering Group,Hefei 230088,China)
出处
《沈阳大学学报（自然科学版）》
CAS
2023年第4期333-339,共7页
Journal of Shenyang University：Natural Science
基金
安徽高等学校省级自然科学重点研究项目(KJ2019A0883)
建筑结构安徽省普通高校重点实验室科研项目(KLBSZD202104)
安徽省大学生创新训练计划项目(AH202112216112,AH202112216115)
国家级大学生创新训练计划项目(202212216008,202212216005)。
关键词
钢-PVA纤维混凝土
梁柱节点
低周反复载荷
骨架曲线
抗震性能
steel-PVA fiber reinforced concrete
beam-column joints
low-cycle reversed loading
skeleton curve
seismic performance
