折板形网壳结构的设计及研究

Design and Research of the Latticed Shell with Folded Plate Type

以某体育馆钢屋盖结构为实例 ,论述了折板网壳结构的选型、受力特点、水平推力的处理方法和模态分析。研究发现 ,该结构的自振频率呈密集型分布 ,结构的基本振动为水平振动 ,而不象平板网架那样以竖向振动为主 。

The folded plate latticed shell is a new type of lattice space structure, having merits of both folded plates and spatial lattice structures. Its mechanical behavior and stability are better than those of the plan grid structures. Based on a gymnasium roof design case, the procedures in structural arrangement, mechanical behavior analysis, method to deal with the horizontal forces and modal analysis are introduced. The results indicate that the natural frequencies of the structure turn to concentrate in a small range.The first mode of the structure is horizontal instead of vertical different from most plan grid structures.Bearing capacity and seismic performance of the structure are satisfactory.