| 陈滔,黄宗明.基于有限单元柔度法的材料与几何双重非线性空间梁柱单元[J].计算力学学报,2006,23(5):524~529 |
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| 基于有限单元柔度法的材料与几何双重非线性空间梁柱单元 |
| Material and geometrically nonlinear spatial beam-column element based on the finite element flexibility method |
| 修订日期：2005-03-28 |
| DOI：10.7511/jslx20065098 |
| 中文关键词: 钢筋混凝土 有限单元柔度法 梁柱单元 几何非线性 二阶效应 |
| 英文关键词:reinforced concrete,finite element flexibility method,beam-column element,geometrically nonlinear,second-order effect |
| 基金项目:教育部高等学校博士学科点专项科研基金;国家自然科学基金 |
| 陈滔 黄宗明 |
| 重庆大学土木工程学院,重庆400045 |
| 摘要点击次数: 1745 |
| 全文下载次数: 10 |
| 中文摘要: |
| 从有限单元柔度法的基本思想出发，基于完全拉格朗日格式（TL格式），建立了能考虑材料与几何双重非线性的一般化空间梁柱单元。适用于满足Euler-Bernoulli梁柱二阶分析理论假定的空间杆系结构非线性分析。另外，在梁柱单元截面分析中引入纤维模型，使其适用于解决钢筋混凝土这类复合材料结构的非线性分析问题。对钢筋混凝土双向偏心受压柱试验结果的模拟分析表明，本文所提方法是正确、可靠的，能有效地分析钢筋混凝土框架柱的材料与几何双重非线性问题。 |
| 英文摘要: |
| Based on the basic idea of the finite element flexibility method and total Lagrangian formulation(TL formulation),the general spatial beam-column element with dual nonlinearity of material and geometry is established in this paper.The proposed beam-column element is applicable to the general nonlinear analysis of spatial framed structures that satisfy the basic assumptions of the second-order theory for Euler-Bernoulli beam-columns.Moreover,Fiber-model is introduced into the sectional analysis of the proposed beam-column element so that it can be applied to the nonlinear analysis of composite material structures such as reinforced concrete.Numerical simulations of experiment on reinforced concrete two-way eccentrically loaded columns shows that the proposed formulation is correct and reliable,and can effectively solve the dual nonlinear problem of material and geometry for reinforced concrete frame columns. |
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