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本文以国道某钢筋混凝土简支T梁桥加固项目为工程实例,通过建立Ansys有限元模型与研究成果的钢筋混凝土T梁的钢板-混凝土组合加固简化公式进行对比分析,并进行了加固后荷载试验效果验证。试验结果表明:简化公式计算结果和数值分析结果偏差在5%之内;加固后结构关键截面抗弯承载力提高42%,刚度提高约40%,应变校验系数为0.29~0.84之间,挠度校验系数为0.32~0.89之间,结构基频实测值比计算值高52.9%~62.4%,该方法对钢筋混凝土T梁桥提升结构刚度及承载能力效果良好。
In this paper, a reinforced concrete T-girder bridge reinforced concrete project is taken as an example of engineering. Through the establishment of Ansys finite element model and the research results reinforced concrete T-beam steel-concrete combination of consolidation simplified formula for comparative analysis, and the reinforced load test Effect verification. The experimental results show that the calculated results of the simplified formula and the numerical analysis results are within 5%. The flexural strength of the key section increases by 42%, the stiffness increases by 40% and the strain correction coefficient is 0.29 ~ 0.84. The deflection The calibration coefficient is between 0.32 and 0.89, and the measured fundamental frequency of the structure is 52.9% ~ 62.4% higher than the calculated value. The method has good effect on the structural rigidity and bearing capacity of the reinforced concrete T-beam bridge.