摘要
研究钢筋锈蚀对混凝土构件抗震动力性能的影响,通过6个不同锈蚀率的大尺寸钢筋混凝土构件低周反复荷载试验及精细化有限元分析,得到不同锈蚀程度的各试件滞回曲线,分析了锈蚀率对试件承载力、刚度、延性、耗能能力等的影响。试验发现钢筋锈蚀在一定程度上改变了试件的失效模式和破坏形态,分析结果表明,随钢筋锈蚀率的增大,试件承载力下降,滞回曲线丰满程度和滞回环面积逐渐减小,刚度、延性和耗能能力逐步降低。钢筋锈蚀后,构件各阶自振频率及振型最大位移随锈蚀率的增大而降低,锈蚀对构件高阶模态影响更为显著。
For the purpose of understanding the seismic dynamic characteristics of corroded full scale reinforced concrete structures under the earthquake,the hysteresis loops and skeleton curves of various degrees of corroded reinforced concrete specimens are obtained through the cyclic loading on six corroded flexural members,The effects of reinforcement corrosion on specimen bearing capacity,stiffness,ductility and energy dissipation are analyzed.It＇s revealed that the fullness and area of hysteresis loop,the bearing capacity,stiffness,ductility and energy dissipation will decrease as the corrosion rate of reinforcement increases.Tests found that the failure mode of the corroded specimen may translate from bending shear failure into bending failure caused by longitudinal bar yielding.The natural vibration frequency and vibration mode gradually decrease as the corrosion rate of reinforcement increases and the effect on high modal responses is more remarkable.
出处
《振动工程学报》
EI
CSCD
北大核心
2016年第1期140-147,共8页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51178470)
河南省高等学校重点科研项目(16A560025)
关键词
钢筋混凝土
抗震
动力性能
锈蚀
低周反复
reinforced concrete
anti-seismic
dynamic property
corrosion
low-period cycle behaviour
