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该文侧重研究了采用高强钢绞线网——聚合物砂浆加固技术三面加固普通钢筋混凝土(RC)梁和预应力混凝土(PRC)梁的抗弯性能。进行了6片RC梁及5片PRC梁的抗弯静载试验,探讨了不同初始损伤程度、有效预应力大小和加载方式等对高强钢绞线网——渗透性聚合物砂浆加固梁的抗弯性能影响。结果表明:采用高强钢绞线网——聚合物砂浆加固技术加固RC/PRC梁能够有效抑制裂缝的开展,能有效地提高RC/PRC加固梁的抗弯承载能力和抗弯刚度;重复加载会导致加固梁刚度一定程度的退化,初始损伤程度大小不会显著改变加固后RC/PRC梁的抗弯承载力;该文研究对于大量既有RC/PRC梁的抗弯加固具有一定的参考价值。
This paper focuses on the bending behavior of reinforced concrete (RC) beams and prestressed concrete (PRC) beams reinforced with high strength steel wire mesh and polymer mortar. The flexural static load tests of 6 RC beams and 5 PRC beams were carried out. The effects of different initial damage, effective prestressing force and loading methods on the strength of beams strengthened with high strength steel wire mesh-permeable polymer mortar Bending performance impact. The results show that strengthening RC / PRC beams with high-strength steel wire mesh-polymer mortar reinforcement technology can effectively suppress the development of cracks and effectively improve the flexural capacity and flexural rigidity of RC / PRC reinforced beams; Resulting in a certain degree of degradation of the stiffness of the reinforcement beam. The initial damage degree will not significantly change the flexural capacity of RC / PRC beams after reinforcement. This paper is of some reference value for the flexural strengthening of a large number of existing RC / PRC beams.