锈蚀钢筋混凝土梁的力学性能研究
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摘要
对24根直径不同的钢筋和8根钢筋混凝土梁进行电化学加速腐蚀模拟后,研究了24根受损钢筋的伸长率、屈服强度和极限强度的变化规律,以及8根不同腐蚀程度钢筋混凝土梁的应力-应变、荷载-挠度曲线和强度的变化规律.结果表明:伸长率的降低是导致锈蚀梁失去安全性能的主要因素;梁的极限承载能力和延性首先呈上升趋势,然后成反比例下降,最后出现陡降,形成不统一的单体,最终发生脆性破坏.
Twenty-four different root diameter reinforcement and eight reinforced concrete beams were made electrochemistry accelerated corrosion simulation.The transformation disciplinarian of the damaged steel elongation bending,strength and ultimate strength were studied,and the transformation disciplinarian for eight different degree corrosion of reinforced concrete beams stress-strain,load-deflection curve and intensity variation were analyzed.The results show that the elongation is the main factor out of safety performance of corrosion beam.The ultimate bearing capacity and ductility of the beam place is on the rise in the first,then inversely proportional decline,finally appearance steep drop,and then form the unified monomer,eventually occur brittle failure.
Twenty-four different root diameter reinforcement and eight reinforced concrete beams were made electrochemistry accelerated corrosion simulation.The transformation disciplinarian of the damaged steel elongation bending,strength and ultimate strength were studied,and the transformation disciplinarian for eight different degree corrosion of reinforced concrete beams stress-strain,load-deflection curve and intensity variation were analyzed.The results show that the elongation is the main factor out of safety performance of corrosion beam.The ultimate bearing capacity and ductility of the beam place is on the rise in the first,then inversely proportional decline,finally appearance steep drop,and then form the unified monomer,eventually occur brittle failure.
引文
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[2]王军强.大气环境下锈蚀钢筋力学性能试验研究分析[J].徐州建筑职业技术学院学报,2003,3(3):25-27.
[3]沈德建,吴胜兴.大气环境混凝土中锈蚀钢筋性能和锈蚀模型试验研究[J].混凝土与水泥制品,2004(3):46-50.
[4]Torres-Acosta AA,Navarro-Gutierrez S,Teran-Guillen J.Residual flexure capacity of corrodedreinforced concrete beams[J].Engineering Structures,2007,29:1145-1152.
[5]田瑞华,颜桂云,孙炳楠,等.锈蚀钢筋混凝土构件承载力的试验研究与理论分析[J].四川建筑科学研究,2003,29(3):36-38.
[6]Mangant Pritpals,Elgant M S.Flex-ural strengthof concrete besms with corroding reinforcement[J].ACI Structural Journal,1999,96(1):149-158.
[7]孙维章,梁宋湘,罗建群.锈蚀钢筋剩余承载能力的研究[J].水利水运科学研究,1993(2):169-179.
[8]易美英,方从启,王艺霖,等.受锈蚀钢筋混凝土梁抗弯性能研究[J].低温建筑技术,2008,1:51-53.
[9]史庆轩,牛荻涛,颜桂云.反复荷载作用下锈蚀钢筋混凝土压弯构件恢复力性能的试验研究[J].地震工程与工程震动,2000,20(4):509-513.
[10]张建仁,李传习,王磊,等.既有钢筋混凝土拱肋承载力测试与分析[J].工程力学,2006,23(12):136-142.
[11]金伟良,赵羽习.锈蚀钢筋混凝土梁抗弯强度的试验研究[J].工业建筑,2001,31(5):9-11.
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