论文部分内容阅读
为既保持钢丝网砂浆或小直径钢筋网砂浆加固混凝土构件的优点,又能大幅度提高被加固构件的承载力,提出钢筋(大直径)钢丝网砂浆加固钢筋混凝土梁的思路。进行了7根钢筋钢丝网砂浆加固梁和1根对比梁的抗弯试验研究,探讨了加固方式和加载方式对钢筋钢丝网砂浆加固梁抗弯性能的影响。试验研究表明,钢筋钢丝网砂浆加固能大幅度提高被加固梁的抗弯承载力;即使在钢丝网用量很少的情况下(施工方便),加固梁仍具有优异的裂缝控制和位移延性。研究还显示,加载至屈服后卸载、再加固梁的极限承载力与一次受力梁差别很小。该文还给出了加固梁的抗弯极限承载力的计算公式,与试验结果吻合良好。
In order to not only maintain the advantages of steel mesh mortar or small diameter steel mesh mortar reinforced concrete members, but also greatly enhance the bearing capacity of the reinforced members, put forward the idea of reinforced (large diameter) steel mesh mortar reinforced concrete beams. The bending test of seven reinforcing steel mesh reinforced mortar beams and one comparative beam was carried out. The effects of reinforcing method and loading method on the flexural properties of reinforced concrete beams strengthened with steel mesh were discussed. Experimental studies have shown that the reinforcement of steel mesh mortar can greatly improve the flexural capacity of the reinforced beam; the reinforced beam still has excellent crack control and displacement ductility even with a small amount of steel mesh (easy construction). The study also shows that the ultimate bearing capacity of unloaded and re-consolidated beams after loading to yield is very similar to that of the primary beams. This paper also gives the calculation formula of the ultimate bearing capacity of the reinforced beam, which is in good agreement with the experimental results.