作　　者： (张红章）;

机构地区： 三明市交通规划设计院,福建三明365000

出　　处： 《三明学院学报》 2017年第4期75-82,共8页

摘　　要： 通过对某预应力T梁桥的外观检查、质量检测和动静载试验,分析了该桥的实际受力状态。采用了粘贴底面钢板、侧面钢板加固混凝土主梁和横向体外预应力筋加固横隔梁的方法对该桥进行了加固,并运用力学知识进行了理论计算,采用数值模拟方法进行了加固后的受力分析,结果表明,粘贴钢板的加固方法能有效提高主梁结构部的抗弯拉性能,横向预应力能提高桥梁的整体刚度,减少和抑制横梁裂缝的发展,使结构受力更合理安全。 Based on the visual inspection, quality test and static and dynamic load test of a prestressed T beam bridge,the actual stress state of the bridge is analyzed. The reinforcement of the bridge is strengthened by the method of strengthening the concrete beam with the bottom plate, the side plate and the transverse external prestressing tendons. The theoretical calculation was carried out by using the mechanics knowledge, and the stress analysis was carried out by using numerical simulation method. Results show that the strengthening method of sticking steel plate can effectively improve the flexural tensile performance of the main beam and transverse prestress can improve the overall rigidity of bridge, reduce and inhibit the development of beam cracks, which make the structure more reasonable and safe.

关 键 词： 梁加固 数值分析 粘钢板 体外预应力