摘要
本文研究了高温后不同降温方式对600MPa级高强钢筋表观形貌与力学性能的影响,分析了其应力-应变曲线、屈服强度、极限强度、断后伸长率以及最大力下总伸长率等力学响应的变化规律。试验结果表明:自然降温与炉内降温方式对高强钢筋力学性能的影响接近,而浸水降温方式对高强钢筋力学性能的影响较大,尤其是在经历800℃高温后,其各项力学性能变化显著。此外,本文还建立了高温后不同降温方式下600MPa高强钢筋的数学模型,能够较好地预测其力学性能。
In this paper,the effects of different cooling methods on the apparent morphology and mechanical properties of 600MPa high-strength steel bars after high temperature were studied,and the mechanical responses such as stress-strain curve,yield strength,ultimate strength,elongation after breaking and total elongation under maximum force were analyzed.The experimental results showed that the effect of natural cooling on the mechanical properties of high-strength steel bars was similar to that of cooling in the furnace,while the effect of soaking cooling was greater,especially the high temperature of 800℃,the mechanical properties of high-strength steel bars changed significantly.In addition,the mathematical models of 600MPa high-strength steel bars under different cooling methods after high temperature were established,which could better predict its mechanical properties.
作者
秦培巧
李利利
李列列
Qin Peiqiao;Li Lili;Li Lielie(North China University of Water Resources and Electric Power,School of water conservancy,Zhengzhou 450046,China;North China University of Water Resources and Electric Power,School of civil engineering and transportation,Zhengzhou 450045,China)
出处
《吉林水利》
2024年第6期1-6,40,共7页
Jilin Water Resources
基金
省部共建西北旱区生态水利国家重点实验室开放基金,冻融环境下修复后裂缝断裂机理及评价模型(2023KFKT-18)。
关键词
降温方式
高温作用
高强钢筋
力学性能
数学模型
Cooling methods
High temperature function
High-strength steel bar
Mechanical properties
Mathematical model
