[提要]  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，该结构的白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，结构表现出良好的受力性能和抗震性能。
[关键词]  折板  网壳  拱  稳定  模态分析

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.
Keywords:  folded plate; latticed shell; arch; stability; modal analysis

    参  考  文  献
1．朱忠义，董石麟，高博青，折板网壳的几何非线性和经济性分析．建筑结构学报，2000，(10)．
2．吴建华，高博清．折板式网壳结构的静力性能和动力性能，杭州应用工程技术学院学报，2001，13(3)．
3．王建锋，预应力空间钢结构的理论分析与应用研究．硕士学位论文，东南大学，2003．
4．高立人等译．结构概念和体系（第二版）中国建筑工业出版社，1999．