CAJ | 학술논문

利用MTSNEW810电液伺服材料试验机,对HRB400,HRB500钢筋的高应变低周疲劳性能进行研究。采用控制总位移幅不变、保持应变率恒定并通过引伸计监测记录应变值的方法,测定HRB500钢筋高应变低周疲劳过程中的循环应力应变曲线,通过Basquin和Manson-Coffin公式拟合得到各规格钢筋的疲劳寿命方程,从而得到循环应力与应变、应变与疲劳寿命的关系。实验结果表明,HRB500高强钢筋比HRB400钢筋在高应变低周疲劳性能方面具有明显的优势。
이용MTSNEW810전액사복재료시험궤,대HRB400,HRB500강근적고응변저주피로성능진행연구。채용공제총위이폭불변、보지응변솔항정병통과인신계감측기록응변치적방법,측정HRB500강근고응변저주피로과정중적순배응력응변곡선,통과Basquin화Manson-Coffin공식의합득도각규격강근적피로수명방정,종이득도순배응력여응변、응변여피로수명적관계。실험결과표명,HRB500고강강근비HRB400강근재고응변저주피로성능방면구유명현적우세。
Using MTS NEW 810 test machine,we research the properties of high strain low cycle fatigue of HRB400 and HRB500 reinforced steel.By controlling the total displacement amplitude unchanged,keeping the strain rate constant,and using the extensometer to record,determine the cyclic stress-strain curve of HRB500 reinforced steel during the high strain low cycle fatigue process.By fitting the Basquin and Manson-Coffin formula,get the fatigue life equation of every size steel,then result in the relationship between cyclic stress and strain,strain and fatigue life.The result shows that,compared with HRB400,HRB500 high strength steel has the obvious advantage at high strain low cycle fatigue properties.