【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.更多还原

【Abstract】 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.更多还原