摘要
完成9根混凝土简支梁的受弯性能试验,研究了配置CRB600H钢筋的适筋梁、少筋梁和超筋梁的受弯特性和不同混凝土强度对CRB600H级钢筋混凝土梁受弯性能的影响,并对配置HRB400级钢筋混凝土受弯简支梁进行试验与比较。试验结果表明,配置CRB600H级钢筋混凝土适筋梁的弯矩-挠度曲线具有较明显的开裂、钢筋屈服和破坏特征点的三折线型曲线,少筋梁和超筋梁的弯矩-挠度曲线呈两折线型曲线。分析了配置CRB600H级钢筋混凝土梁的破坏特征、正截面承载能力、裂缝间距、裂缝宽度和挠度值,适筋梁的分析结果与试验结果比较吻合良好,结论可供工程设计参考。
The bending performance tests of 9 simply supported concrete beams were completed.The flexural behavior of proper reinforced beams,less reinforced beams and super reinforced beams with CRB600H reinforcement and the impact of different concrete strength on the flexural behavior of CRB600H RC beams were studied and comparisons were carried out on one RC beam with of HRB400 steel bars.The test results show that the bending behavior of CRB600H RC beam is similar to that of HRB400 RC beam.The bending moment-deflection curve of CRB600H RC beam is triple fold line and it has three characteristic points of cracking,yield and failure of reinforcement and the flexural moment and deflection curve of less and over-reinforced beams are double fold.The failure characteristics,bearing capacity of normal section,crack spacing,crack width and deflection value analyzed.The analysis results of suitable reinforced beams are in good agreement with the test results,test results can provide reference for practical engineering design.
作者
唐昌辉
陈盈利
TANG Changhui;CHEN Yingli(College of Civil Engineering,Hunan University,Changsha,Hunan 410082,China)
出处
《公路工程》
2022年第5期12-17,共6页
Highway Engineering
基金
国家自然科学基金资助项目(51878268)。
