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钢波纹管涵洞的薄壳效应

, PP. 86-90

Keywords: 道路工程,钢波纹管涵洞,有限元,薄壳效应

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Abstract:

从旋转对称壳基本理论着手,总结发现工程计算法、解析法等均不适用竖向受力的涵洞工程.根据试验数据用有限元法分析了钢波纹管涵洞大应变与小应变问题,得到两者的结果非常接近,完全可以采用小应变方法进行分析.针对工程现场采用的反开槽回填法施工,建立了有限元力学分析模型,采用底面约束所有位移和扭转自由度、管两侧立面施加水平位移约束、顶面施加荷载、其余面自由的边界条件,施加竖向汽车荷载进行分析.结果表明,该模型得到的计算结果和现场实测值拟合良好,说明该法是可行的,所得的结论是可靠的.

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