Abstract The punching shear resistance of reinforced concrete flat plates is an area where design is typically done in a highly-idealized manner, using provisions developed from experimental results of isolated slab-column connections; yet, involves structures where performance may be greatly impacted by system-level response. This paper presents the development and application of a practical thick-shell finite element-based nonlinear modelling procedure for reinforced concrete flat plate slab systems. Cracked concrete material modelling based on the formulations of the Disturbed Stress Field Model is employed in conjunction with computationally-efficient layered thick-shell finite elements that accommodate through-thickness shearing effects and are shown to be capable of capturing brittle punching-governed failure modes. A simple low-cost sectional analysis modification procedure is proposed to incorporate strength enhancements attributed to confining effects stemming from disturbances in slab-column connection regions. Load-displacement responses and failure modes developed using the proposed modelling procedure are shown to capture observed experimental responses and provide response estimates similar to those obtained using more costly three-dimensional solid continuum finite element modelling techniques. Finally, the analysis results presented were developed using simple-to-define concrete property input without the need for supplemental material model or analysis parameter calibration.

中文翻译：

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基于厚壳建模方法的钢筋混凝土平板冲压非线性有限元分析

摘要 钢筋混凝土平板的抗冲剪力是一个通常以高度理想化的方式进行设计的领域，使用从孤立板柱连接的实验结果中得出的规定；然而，涉及性能可能会受到系统级响应的极大影响的结构。本文介绍了一种实用的基于厚壳有限元的钢筋混凝土平板系统非线性建模程序的开发和应用。基于扰动应力场模型公式的开裂混凝土材料建模与计算效率高的分层厚壳有限元结合使用，这些有限元适应全厚度剪切效应，并显示能够捕获脆性冲压控制的失效模式。提出了一种简单的低成本截面分析修改程序，以结合由于板柱连接区域中的扰动引起的限制效应而导致的强度增强。使用建议的建模程序开发的载荷位移响应和失效模式显示为捕获观察到的实验响应并提供类似于使用更昂贵的三维实体连续有限元建模技术获得的响应估计。最后，所呈现的分析结果是使用易于定义的混凝土属性输入开发的，无需补充材料模型或分析参数校准。使用建议的建模程序开发的载荷位移响应和失效模式显示为捕获观察到的实验响应并提供类似于使用更昂贵的三维实体连续有限元建模技术获得的响应估计。最后，所呈现的分析结果是使用易于定义的混凝土属性输入开发的，无需补充材料模型或分析参数校准。使用建议的建模程序开发的载荷位移响应和失效模式显示为捕获观察到的实验响应并提供类似于使用更昂贵的三维实体连续有限元建模技术获得的响应估计。最后，所呈现的分析结果是使用易于定义的混凝土属性输入开发的，无需补充材料模型或分析参数校准。