曲杆结构非线性分析中的直梁单元和曲梁单元  

Curved-beam element and straight-beam element used in the nonlinear analysis of curved frame structures

作　　者：刘磊[1] 许克宾[1] 

机构地区：[1]北方交通大学土木建筑学院,北京100044

出　　处：《铁道学报》2001年第6期72-76,共5页Journal of the China Railway Society

摘　　要：采用直梁单元 ,编制了杆系结构的几何非线性有限元程序。通过 2个曲杆结构的实例 ,对采用直梁单元和多种曲梁单元的有限元计算进行了对比。结果表明 ,采用两类单元的计算结果没有明显的差别。因而 ,在杆系结构的非线性分析中 ,可以采用直梁单元来模拟曲梁 ,进行屈曲分析。In this paper, a computer code of geometric-nonlinear analysis of the frame structures, which used straight-beam element, was developed. By two examples about curved frame structures, several computations used both straight-elements and curved-beam elements were contrasted. The result indicated that there was no distinct difference between the two types of elements. So it is sure that the straight-beam element can simulate the curved-structures and can be used in the buckling analysis of frame structures.

关 键 词：杆系结构 直梁单元 曲梁单元 工程结构 非线性分析 

分 类 号：TU32[建筑科学—结构工程]