鞍式支承大直径平直型钢管桥内力计算分析  

Calculation and Analysis on Internal Force of Saddle Supported Large-diameter Flat Steel Pipe Bridge

作　　者：沈晔[1] 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《城市道桥与防洪》2015年第7期89-92,12,共4页Urban Roads Bridges & Flood Control

摘　　要：以支承在钢筋混凝土鞍式支承上的大直径自承式平直型钢管桥为例,进行了基于Winkler地基的自承式钢管桥三维有限元数值计算。计算中分析确定了合理的钢管内液体压力荷载模式以及钢管与混凝土支墩间的基床系数,并将计算结果与现行管桥设计规程推荐的计算方法进行了对比。结果表明:自承式管桥的支承断面为结构设计的控制性断面;在支承边界处,管壁结构内力达到最大;按现行设计规程设计大直径管桥时有较大的安全储备。Taking the large-diameter self-supported flat steel pipe bridge supported on steel reinforced concrete saddle support as an example, the article introduces the three-dimension finite element numerical calculation of self-supported steel pipe bridge based on Winkler subgrade. After the calculation, the article analyzes to determine the reasonable liquid pressure load model in steel pipe and the subgrade coefficient between steel pipe and concrete pier, and compares the calculation result and the calculation method recommended by the current pipe and bridge design regulations. The result shows that the supporting section of self-supported pipe bridge is the controlled section of structure design. The inner force of pipe wall structure will reach the maximum at the edge of supported area. The safe storage is ample when the large-diameter pipe bridge is designed on the current design regulations.

关 键 词：管桥 数值计算 鞍式支承 

分 类 号：TU990.3[建筑科学—市政工程]