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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。
Three kinds of different repair measures were made for the damage degree of damaged reinforced concrete beams, and the flexural tests of the repaired reinforced concrete beams were conducted to study the bending failure modes and crack propagation characteristics. The results show that the repaired reinforced concrete beam has good ductility, the bending failure mode is the destruction of a suitable reinforcement beam, and it has the characteristics of plastic failure. The repaired reinforced concrete beam meets the requirements for continuous use; the reinforced concrete beam spans the mid-bending section. There are multiple cracks and they all expand into main cracks when reinforced concrete beams break down.