On the solution of multi-point constraints - Application to FE analysis of reinforced concrete structures
On the solution of multi-point constraints - Application to FE analysis of reinforced concrete structures
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DOI：
10.1016/j.compstruc.2008.04.018
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发表时间：
2009-08
影响因子：
4.7
通讯作者：
L. Jendele;Jan ervenka
中科院分区：
文献类型：
--
作者：
L. Jendele;Jan ervenka
本文提出了一种在有限元求解器中实现一般多点约束条件的有效方法。所提出的方法的应用和处理的多点约束的主要未知变量的有限元方法是计算效率和内存经济，因为所有的约束自由度（DOF）已经消除在组装的整体刚度矩阵和右手侧矢量。所采用的概念有广泛的用途，并讨论了它的几种可能性。最后，通过对钢筋混凝土结构的实例分析，说明了本文提出的非线性有限元离散钢筋模型在工程实际中的优越性。
The paper presents an efficient way of implementing general multi-point constraint conditions in a finite element solver. The proposed method of applying and processing the multi-point constraints on the primary unknown variables of finite element method is computationally efficient and memory economical, because all constrained degrees of freedoms (DOFs) are already eliminated during the assembly of the global stiffness matrix and right-hand side vectors. The adopted concept has a wide range of use, and several of its possibilities are discussed. At the end of the paper, sample analyses of reinforced concrete structures are presented that demonstrate the advantages of the developed form for modelling discrete reinforcement bars in non-linear FE calculation in engineering practice.