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da kua du wu jiao gong du cao gong lei san wei shu zhi mo ni yan jiu
Author(s): 
Pages: 1-3,68
Year: Issue:  10
Journal: Water Resources & Hydropower of Northeast China

Keyword:  大跨度无铰拱渡槽拱肋三维数值模拟;
Abstract: 本文基于大型有限元软件ANSYS对大跨度无铰拱渡槽——英那河渡槽进行了三雏有限元数值模拟计算,着重对风荷栽、水压力、温度应力、混凝土收缩和徐变等荷载影响下的主拱圈的应力和变形进行了分析.得出:无铰拱主拱圈拱顶、拱脚及排架作用位置为关键受力部位;背风侧拱肋在满槽、温度升高时压应力最大;迎风侧拱肋在空槽、温度降低时压应力最小;通过对英那河渡槽拱肋最不利截面各个角点的应力分析,为拱肋的抗裂分析提供了依据.通过对风荷栽作用下拱肋变形的分析,得出:满槽、空槽、温升、温降各工况拱肋沿风荷载方向变形几乎相同;在满槽、温度降低时拱肋竖向位移最大.所得结论为无铰拱渡槽的结构分析提供理论支持和实践经验.
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