【摘要】 为研究两种主流加固技术对预应力混凝土T梁桥的加固效果、材料利用率以及经济指标差异，采用midas Civil有限元软件建立出粘贴钢板加固和体外预应力加固两种加固技术的结构模型，对比分析两种技术加固前后主梁的挠度、上下缘正应力以及材料强度利用率，并对造价指标进行分析。结果表明：两种加固技术都能提升桥梁结构整体刚度、抗弯承载能力以及截面正应力；体外预应力材料强度利用率比粘贴钢板材料强度利用率高15.67%，且体外预应力加固技术应用于此类桥梁主材造价更低。因此加固此类桥梁建议优先考虑体外预应力加固技术。更多还原

【Abstract】 To study the differences in the effectiveness, material utilization rate, and economic indicators of two main reinforcement technologies for prestressed concrete T-beam bridges, a structural model of the bonded steel plate reinforcement and the external pre-stress reinforcement technologies was established using the Midas Civil finite element software. The model was used to compare and analyze the deflection, upper and lower flange tensile stress, and material strength utilization rate of the main beam before and after the two technologies were applied. The cost indicators were also analyzed. The results show that both reinforcement technologies can enhance the overall stiffness, bending resistance capacity, and sectional tensile stress of the bridge structure. The material strength utilization rate of the external pre-stress reinforcement is 15.67% higher than that of the bonded steel plate reinforcement.Furthermore, the external pre-stress reinforcement technology has a lower material cost for this type of bridge. Therefore, it is recommended to prioritize the use of the external pre-stress reinforcement technology for reinforcing such bridges.更多还原