局部锈蚀钢筋混凝土梁承载力试验研究

摘要

为模拟实际构件中的局部锈蚀现象,通过外加电流对位于钢筋混凝土梁端部与跨中局部区段的受拉钢筋进行加速锈蚀,并研究其力学性能与变形性能.结果表明：随着锈蚀程度的增加,局部锈蚀梁承载力明显下降,挠度显著增大,刚度减小;跨中锈蚀的影响程度高于端部锈蚀;截面变形基本符合平截面假定.%Accelerated corrosion experiments were performed on partial length （such as mid-span and end zone） of tensile longitudinal rebars in reinforced concrete （RC） beams in order to simulate the real conditions, then mechanical properties and deformation properties of these partially corroded beams were tested. Experimental results indicate that the load capacity of partially corroded RC beams decreases with rebars＇ corrosion ratio, and the deflection increases and stiffness degradation appears at the same time. For RC beams with same corrosion degree, load capacity of beams corrodes at the mid-span decrease more than that beams corrodes at the end zone. But the section deformation still basically meets the plane section assumption.