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为达到普通混凝土代替高性能砂浆进而降低工程造价并方便取材的目的,基于现行P-SWR加固技术,提出混合预应力加固抗弯构件理论.以英德市大湾镇连江大桥加固为工程背景,采用先张法和后张法共同作用的方法,利用Midas有限元软件,模拟钢筋混凝土“T”梁的不同受力工况,分析各阶段应力分布规律.结果表明:有限元模拟结果与理论计算结果相吻合,验证混合预应力加固理论对钢筋混凝土“T”梁承载力有一定的提高.
In order to achieve the purpose of replacing ordinary high-performance mortar with mortar, thus reducing construction costs and facilitating materials extraction, the theory of prestressed reinforced flexural members is proposed based on the existing P-SWR reinforcement technology. , Using the method of pre-tension method and post-tension method together, using Midas finite element software to simulate different stress conditions of reinforced concrete “T ” beam, and analyze the stress distribution law of each stage.The results show that the finite element simulation results It is in good agreement with the theoretical calculation results to verify that the theory of hybrid prestressed reinforcement has a certain improvement on the bearing capacity of “T” beam of reinforced concrete.