弹性地基上十字交叉梁考虑上部结构影响分析的超元法  

SUPER ELEMENT METHOD FOR ANALYZING GRILLAGE BEAMS ON ELASTIC FOUNDATION CONSIDERING INFLUENCE OF UPPER STRUCTURES

作　　者：孙建琴[1] 李从林[1] 刘勇 

机构地区：[1]兰州交通大学土木系 [2]中国轻工业上海设计院

出　　处：《土木工程学报》2004年第2期28-32,共5页China Civil Engineering Journal

摘　　要：本文提出弹性地基上十字交叉梁考虑上部结构影响分析的超元法 ,即将房屋上部每榀框架各层梁与基础梁在X方向和Y方向均简化处理成一根等效梁 ,整个结构视为弹性地基上十字交叉梁系 ,导出等效梁的超级单元刚度矩阵 ,然后用有限元法分析。本方法计算简便 ,适应性强 ,且具有较高的精度。Using the super element method to analyze grillage beams on elastic foundation considering the influence of upper structures is presented, i.e., the beams of upper framed structures on every storey of buildings and the foundation beams are simply treated as an equivalent beam in the x and y directions respectively.The whole structure is looked on as a series of grillage beams on elastic foundation,meanwhile, the super element stiffness matrix of the grillage beams is derived, and then it is analyzed by the finite element method. The method in the paper is simple and convenient in computation with wide adaptability and higher accuracy.

关 键 词：弹性地基 十字交叉基础梁 上部框架结构 超元法 

分 类 号：TU471.2[建筑科学—结构工程]