望亭水利枢纽更新改造工程人行桥设计与分析

On Design & Analysis of Pedestrian Overpass of Renovation & Transformation Project of Wangting Hydro-junction

望亭水利枢纽更新改造工程人行桥采用单跨70.12 m钢管桁架拱的结构形式。利用空间有限元程序建立杆单元模型,进行了动力及静力分析。通过动力分析了解了结构在人行荷载作用下的振动性能,同时通过静力分析了解了各杆件的应力情况,并对最不利杆件进行了稳定及疲劳验算,指导施工图设计。最后对施工方法作简要介绍。

The pedestrian overpass of renovation & transformation project of Wangting Hydro-junction is adopting structure type of steel tube truss arch with the single span of 70.12 m.By use of space finite element procedure,bar elements model is setup to make dynamic and static force analyses.The vibration performance of structure under the condition of pedestrian load is researched through dynamic force analysis,and meanwhile,the stress condition of different member bar is also researched through static force analysis.Otherwise,the most unfavorable member bar is made static and fatigue assessments to guide the construction drawing design.Finally,the related construction method is introduced briefly.