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北京工业大学学报 2015

拱桥加固施工中的配重设计方法

Keywords: 桥梁工程,加固,圬工拱桥,偏心距,施工配重,AnsysAPDL

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Abstract:

为了解决大跨径圬工拱桥加固施工阶段由于内力分布不佳等导致结构强度不足的问题,提出通过在结构上适宜位置布置施工临时配重的解决方法.分析了圬工拱的极限承载力与合力偏心距e之间的关系,研究结果表明:利用偏心距e与其限值e0之间的相对关系可快速、定性判断圬工拱截面承载力是否足够.通过合理调整配重荷载量值与布置位置以控制加固施工过程中截面e不超过容许值e0或预设值,提出了大跨径圬工拱桥加固施工配重方案设计方法.以一座2×100m混凝土箱板拱桥加固施工中3个阶段的配重方案设计为例,检验了方法的可行性与有效性.

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