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特重车通过大跨石拱桥安全评定及加固措施研究

, PP. 70-76

Keywords: 桥梁工程,石拱桥,荷载试验,有限元计算,安全评定,桥梁加固

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Abstract:

以一质量达340t的特重车通过白水港一桥项目为背景,考虑到按常规荷载等级设计的旧石拱桥的承载力一般难以满足超重荷载通行的要求,对特载通行的可行性进行了安全评定。通过现场静、动荷载试验,评估了桥梁的整体刚度和强度,并结合试验结果,利用桥梁通用有限元软件分别建立单梁模型和实体模型进行结构承载能力检算及动力特性分析。综合桥梁现状及有限元计算结果,提出安全评定结论,并依据评定结果提出了现浇三钢混凝土和压注水泥砂浆的有效加固措施,确保了特重车安全过桥。

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