修复钢筋混凝土梁受弯破坏形态及裂缝扩展特点试验研究  

EXPERIMENTAL RESEARCH ON FLEXURAL FAILURE MODE AND CRACK PROPAGATION CHARACTERISTICS OF REPAIRED REINFORCED CONCRETE BEAM

作　　者：肖辉[1] 惠云玲[1] 赵晨[1] 

机构地区：[1]中冶建筑研究总院有限公司,北京100088

出　　处：《工业建筑》2017年第4期170-173,共4页Industrial Construction

摘　　要：针对受损钢筋混凝土梁的破坏程度,制定3种不同的修复措施,并对修复后的钢筋混凝土梁进行抗弯试验,研究其受弯破坏形态及裂缝扩展特点。研究结果表明:修复后的钢筋混凝土梁具有较好的延性,受弯破坏形态为适筋梁破坏,具有塑性破坏特征,修复后的钢筋混凝土梁满足继续使用要求;钢筋混凝土梁跨中受弯段出现多条裂缝,且在钢筋混凝土梁破坏时均扩展为主裂缝。According to the damage degree of reinforced concrete beam,three different repair measures were proposed.And this paper studied the flexural failure mode and crack propagation characteristics of repaired reinforced concrete beam through the bending test.The results showed that the repaired reinforced concrete beam had better ductility; the flexural failure mode was the balanced-reinforced beam damage and had the characteristics of plastic failure.The repaired reinforced concrete beam could meet the requirements to continue to use.Multiple cracks appeared in the mid-span flexural section of reinforced concrete beam and developed into the main crack when the reinforced concrete beam damaged.

关 键 词：受损钢筋混凝土梁 修复措施 受弯破坏形态 裂缝扩展特点 适筋梁破坏 

分 类 号：TU375.1[建筑科学—结构工程]