# [1]齐念,叶继红.基于离散元法的杆系结构几何非线性大变形分析[J].东南大学学报(自然科学版),2013,43(5):917-922.[doi:10.3969/j.issn.1001-0505.2013.05.003] 　Qi Nian,Ye Jihong.Geometric nonlinear analysis with large deformation of member structures by discrete element method[J].Journal of Southeast University (Natural Science Edition),2013,43(5):917-922.[doi:10.3969/j.issn.1001-0505.2013.05.003] 点击复制 基于离散元法的杆系结构几何非线性大变形分析() 分享到： var jiathis_config = { data_track_clickback: true };

43

2013年第5期

917-922

2013-09-20

## 文章信息/Info

Title:
Geometric nonlinear analysis with large deformation of member structures by discrete element method

Author(s):
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China

Keywords:

TU323.5
DOI:
10.3969/j.issn.1001-0505.2013.05.003

Abstract:
The discrete element method(DEM)was applied in geometric nonlinear analysis with large deformation of member structures including two-dimension and three-dimension frames. Based on the simple beam theory, the spring contact stiffness expression for analysis of member structures was derived. The estimation method of the critical value for the time step size was proposed, and the verification of numerical test was carried out. Since the DEM is essentially used to resolve dynamic problem of structures, for the problem of calculating the static solution, the proposed damping coefficient is taken as 0.7 considering the numerical accuracy and computational efficiency. Three classical numerical examples were presented, including two planar frames and a spatial reticulated structure. Their static and dynamic large deflection behaviours were simulated respectively. The calculation results agree well with the solutions by other numerical methods. Without assembling stiffness matrixes and iterations during structural geometric nonlinear analysis, the DEM is reliable in dealing with large deformation problem for member structures.

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