空间杆系结构的有限元非线性分析
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摘要
推导建立一种用于空间杆系结构非线性计算的多结点空间等参杆单元。这一单元运用了有限位移的增量理论,引入了等参元的概念,结合材料的非线性模型可有效地解决空间杆系结构的非线性分析计算问题,能更好地处理空间曲杆。在处理非线性计算时采用了以单元内积分点的非线性状态综合描述单元非线性状态的方法
This paper developed a multiple noded isoparametric element for the nonlineer analysis of space frames. Finit displacement theory and isoparametric concept are applied. This element used also the mathematical models of the material nonlinearity and is able to deal with the nonlinear analysis of space frames effectively. When the nonlinear analysis is carried out, the nonlinear conditions of the isoparametric element are put into effect with the help of the nonlinear conditions of the Gauss integration points in the isoparametric element. The comparing with the other nonlinear analysis proves that the multiple noded isoparametric element for space frames is reasonable and effective.
引文
1鹫津久一郎.弹性和塑性力学中的变分法.老亮、郝松林译.科学出版社,1984.379~4382ChenWFPlasticityinreinforcedconcreteNewYork:MeGraw-Hil,1982.376~3843罗韧.钢筋混凝土肋拱承载力的空间计算:〔硕士学位论文〕.成都:西南交通大学,19854梁启智、谢理.高层建筑空间结构体系非线性地震反应分析.第十一届全国高层建筑结构学术交流会论文集1990,1326~13355刘南科、周基岳.钢筋混凝土框架的非线性全过程分析.土木工程学报,1990,(4):2~146李田、吴学敏.高层及复杂结构多维时程弹塑性动力分析.见:第十二届全国高层建筑结构学术交流会论文集.1992.535~543

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