大连理工大学学报Issue(2)：157-164,8.DOI:10.7511/dllgxb201502006
基于有效刚度的空间框架结构几何非线性分析
Geometrical non-linear analysis of space frame structures based on effective stiffness
摘要
Abstract
A geometrical non-linear finite element analysis method is proposed based on the effective stiffness of the elements of the space reinforced concrete frame structure by modifying the local stiffness matrix of existing elastic finite element of 3D linkage with the bending moment-rotation relationship of element including axial forces,and a simplified approach for quantifying the initial axial force of the column is suggested.Comparison of the results obtained by the proposed method,Chinese code GB 50010-2010 and American code ACI 318-1 1 is carried out.The analytical results indicate that, generally,only twice iterations are needed for the proposed method to achieve the accuracy of engineering requirement,and unnecessary for iteration if the initial axial force estimated by the suggested simplified method is used.For regular frame structures,the outcomes of the proposed method are close to those of Chinese code and American code.For irregular frame structures,the outcomes of the proposed method are greater than those of the two codes.关键词
空间框架结构/几何非线性/有效刚度/二阶效应Key words
space frame structures/geometrical nonlinearity/effective stiffness/second-order effect分类
建筑与水利引用本文复制引用
贡金鑫,王莹..基于有效刚度的空间框架结构几何非线性分析[J].大连理工大学学报,2015,(2):157-164,8.基金项目
国家自然科学基金资助项目(51278081) （51278081）
