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首页> 外文学位 >Development of a nonlinear quadrilateral layered membrane element with drilling degrees of freedom and a nonlinear quadrilateral thin flat layered shell element for the modeling of reinforced concrete walls.
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Development of a nonlinear quadrilateral layered membrane element with drilling degrees of freedom and a nonlinear quadrilateral thin flat layered shell element for the modeling of reinforced concrete walls.

机译：开发具有钻孔自由度的非线性四边形层状膜单元和用于钢筋混凝土墙建模的非线性四边形薄层状薄壳单元。

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摘要

The primary thrusts of this dissertation are to develop and test a new quadrilateral layered membrane element with drilling degrees of freedom (DOF) and a quadrilateral thin flat layered shell element for the nonlinear analysis of reinforced concrete walls. The drilling degrees of freedom refers to the incorporation of the in-plane rotation as a degree of freedom at each node of the element. The membrane element consists of a quadrilateral element with a total of 12 DOF, 3 per node, 2 displacements and 1 in-plane rotation, and uses a blended field interpolation for the displacements over the element. This formulation is an extension of the one developed by Xia et al. in 2009. The shell element is created by the combination of the membrane element developed in this dissertation and a Discrete Kirchhoff Quadrilateral Element (DKQ, 12 DOF), formulated by Batoz and Tahar in 1982, to model the out of plane bending behavior of the element. The modeling of the section of the membrane and the shell element consists of a layered system of fully bonded, smeared steel reinforcement and smeared orthotropic concrete material with the rotating angle formulation. The layered section for the shell includes the coupling membrane and bending effects. These elements are implemented on a finite element framework using the object oriented programing language under MATLAB. The framework or MATLAB toolbox for Finite Elements developed for this dissertation allows to incorporate, develop and test new elements, materials, sections and analysis algorithms in a easy and quick manner. The proposed elements are evaluated using experimental results that are available in the literature. It is shown that the new elements are in excellent agreement with the experimental results for the different load configuration, monotonic and cyclic loading, and they are able to predict the failure modes for the different wall configurations analyzed in this dissertation.
机译：本文的主要目的是开发和测试一种新的具有钻孔自由度（DOF）的四边形层状膜单元和一个用于薄壁钢筋混凝土墙非线性分析的四边形薄扁平层壳单元。钻削自由度是指将平面内旋转合并为元素每个节点的自由度。膜单元由一个四边形单元组成，总共12个自由度，每个节点3个，位移2个，平面内旋转1个，并使用混合场插值法对该单元上的位移进行操作。这种配方是Xia等人开发的配方的扩展。壳单元是由本论文开发的膜单元与1982年由Batoz和Tahar提出的离散Kirchhoff四边形单元（DKQ，12 DOF）组合而成的，以模拟壳体的平面外弯曲行为。元件。膜和壳单元截面的模型由分层系统组成，该系统由具有旋转角度公式的完全粘结的涂抹钢增强材料和涂抹正交异性混凝土材料组成。壳体的分层部分包括耦合膜和弯曲效果。这些元素是在MATLAB下使用面向对象的编程语言在有限元框架上实现的。本文为有限元开发的框架或MATLAB工具箱允许轻松，快速地合并，开发和测试新的元素，材料，截面和分析算法。使用文献中提供的实验结果对提出的元素进行评估。结果表明，新的单元与不同载荷配置，单调和循环载荷的实验结果非常吻合，并且能够预测本文分析的不同壁配置的破坏模式。

著录项

  • 作者

    Rojas Barrales, Fabian.;

  • 作者单位

    University of Southern California.;

  • 授予单位 University of Southern California.;
  • 学科 Civil engineering.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 232 p.
  • 总页数 232
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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