钢筋锈蚀对在役混凝土梁承载力影响分析

摘要

After the reinforcements corroding,the concrete bonding role of concrete beams in-service declined,and which affected the carrying capacity of beams; when the weakening were fewer, the carrying capacity of beams had no significant drop, and their force models were the same as the intact beams;when the bonding role entirely lost,the beams force model became the "bar-arch" type,the carrying capacity decreased significantly, and with the increasing of bonding failure section diminished.%钢筋锈蚀后,在役的混凝土梁中钢筋与混凝土的粘结作用下降,影响了梁的承载力；当粘结作用削弱较少时,梁的承载力没有明显下降,受力模式与完好梁相同；当粘结作用完全丧失时,梁的受力模式变为“拉杆拱”式,承载力明显下降,且随着粘结失效区段的增加而逐渐减小.