新型无波纹拱壳的承载力研究

STUDY ON BEARING CAPACITY OF A NEW TYPE OF NON-CORRUGATED ARCHED-SHELL

波纹拱壳在我国是一种新型的空间结构。由于其造价低、工期短 ,在国内得到了大规模的应用。目前在国内每年的施工面积都在 2 0 0万平方米以上。但大量波纹拱壳倒塌事件引起了业界的广泛重视。针对波纹拱壳的不足之处 ,开发了一种新型的拱壳结构———无波纹拱壳。通过对这种结构进行非线性有限元分析 ,研究了影响无波纹拱壳承载力的主要因素 ,并将两种拱壳结构的承载力作了比较。研究结果表明 :无波纹拱壳结构具有承载力高 ,成型工艺简单的特点 。

The bearing capacity of a new type of arched shell is studied in the paper.The corrugated arched shell is a type of space structure widely used in China. However, a great attention is attracted for its collapse accidents. A new type of arched shell is proposed in the paper,it is called the non corrugated arched shell.Its bearing capacity is analyzed using the nonlinear finite element method and stability theory.The main effects on the bearing capacity of the new arched shell are discussed.Comparisons between two types of the arched structure are made. It is found that the new arched shell is one of the ideal types.