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首页> 外文期刊>Bulletin of earthquake engineering >A nonlinear quadrilateral thin flat layered shell element for the modeling of reinforced concrete wall structures
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A nonlinear quadrilateral thin flat layered shell element for the modeling of reinforced concrete wall structures

机译：用于钢筋混凝土墙体结构建模的非线性四边形薄扁平分层壳元件

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摘要

In this article, a simple and accurate quadrilateral thin flat layered shell element formulation for the nonlinear analysis of reinforced concrete (RC) wall systems under static and cycling loads is presented. The 4 node shell element, with 6 degree of freedom (DOF) per node (3 displacements and 3 rotations) is created by superposing the quadrilateral layered membrane element with drilling degrees of freedom (12 DOF, 2 displacement and 1 rotation per node) developed by Rojas et al. (Eng Struct 124:521-538, 2016), and the Discrete Kirchhoff Quadrilateral Element (12 DOF, 1 displacement and 2 rotations) formulated by Batoz and Tahar (Int J Numer Methods Eng 18(11):1655-1677, 1982), to model the in-plane and the out of plane bending behavior of the shell element, respectively. In addition, to model the complex behavior and coupling of the axial, flexural and shear behavior, observed in complex RC wall structures, the transversal section of 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 formulation used a tangent stiffness matrix approach, which include the coupling of membrane and bending effects. For verification, the shell element formulation is used to model a set of experimental results for T-shaped RC walls that are available in the literature. The proposed element is robust, simple to implement, and it can predict the global results (load vs. displacement and maximum capacity) and also the local behavior (vertical strain at the base level along the web and the flange) observed in RC wall structures.
机译：在本文中，提出了一种简单且精确的四边形薄扁平的平坦分层壳体配方，用于静态和循环负荷下的钢筋混凝土（RC）壁系统的非线性分析。通过将四边形分层膜元件叠加具有钻孔自由度（12 DOF，2个位移和每个节点的1轮）来创建每个节点的4个节点壳元件（3位移和3个旋转）的4个节点壳元件（3位移和3个旋转） rojas等人。 （ENG STRUCT 124：521-538,2016）和由Batoz和Tahar配制的离散的Kirchhoff四边形元件（12 DOF，1位和2个旋转​​）（int J Nomer Methable ENG 18（11）：1655-1677,1982） ，分别模拟平面内和外壳元件的平面弯曲行为。此外，为了模拟在复杂的RC壁结构中观察到的轴向，弯曲和剪切行为的复杂行为和耦合，壳元件的横向部分由完全粘合，涂层钢筋加固和涂抹的正交混凝土材料的层状系统组成具有旋转角度配方。该配方使用了切线刚度基质方法，其包括膜和弯曲效应的偶联。为了验证，壳元件配方用于模拟文献中可用的T形RC壁的一组实验结果。所提出的元素是坚固的，实现简单，它可以预测在RC壁结构中观察到的全局结果（负载与位移和最大容量）以及局部行为（沿腹板和沿腹板的垂直应变） 。

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