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A new shear-flexible FRP-reinforced concrete slab element

机译：新型剪挠FRP增强混凝土板单元

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摘要

In this paper, a simple shear-flexible rectangular layered FRP-reinforced concrete slab element is developed based on Mindlin-Reissner plate theory and Timoshenko's composite beam functions for nonlinear finite element analysis of FRP-reinforced concrete slabs. The Timoshenko's composite beam functions are developed for FRP-reinforced concrete slabs based on those for composite laminates. The plane displacement interpolation functions of a quadrilateral isoparametric element with drilling degrees of freedom are employed to describe the membrane effects and the bending effects of the slab element are represented by the rotation functions of the slab element derived from Timoshenko's composite beam functions. Both geometric nonlinearity and material nonlinearity of the materials are included in the new element. The efficiency of the element for nonlinear finite element analysis of FRP-reinforced concrete slabs is validated by comparing the computed results of two numerical examples with those obtained from lab tests.
机译：本文基于Mindlin-Reissner板理论和Timoshenko的复合梁函数，基于FRP加固混凝土板的非线性有限元分析，开发了一种简单的剪力矩形矩形FRP加固混凝土板单元。季莫申科的复合梁功能是根据复合层压板的基础，针对FRP增强混凝土板开发的。采用具有钻井自由度的四边形等参单元的平面位移插值函数来描述膜效应，并根据从Timoshenko的复合梁函数推导出的平板单元的旋转函数来表示平板单元的弯曲效果。材料的几何非线性和材料非线性都包含在新元素中。通过将两个数值示例的计算结果与从实验室测试中获得的结果进行比较，可以验证该元素用于FRP增强混凝土板非线性有限元分析的效率。

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