某大跨度连廊曲线桁架结构分析与设计

Analysis and Design of Curvilinear Truss Structure for a Long Span Corridor

某连廊跨度约为55m,结构可利用高度为9.0m,平面宽度为7.5m。平面投影呈曲线型,在竖向荷载下存在较大的偏心,从而引起结构整体受扭。采用立面曲线钢桁架结构,上下楼面设置水平桁架,以增强结构整体抗扭刚度。主要介绍了连廊结构体系的选型与布置、设计依据、结构分析结果、楼盖舒适度分析以及关键节点设计。重点对楼面梁系的方案选型和楼盖舒适度进行了详细的分析。

A corridor has a span of 55 meters,a height of 9.0 meters and a width of 7.5 meters.Its plane projection is a curved line,which brings about an eccentricity under the vertical loads.As a result,the whole structure is torsion.Elevation curved steel truss structure is adopted with two floor trusses which can enhance the overall torsional stiffness of the structure.The corridor structural system,analysis conditions,analysis results,floor comfort degree analysis and the key connection design are introduced.The selection of the floor beam system and floor comfort degree is analyzed in detail.