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Effective modelling of structural glass with laminated shell elements

机译：使用叠层壳单元对结构玻璃进行有效建模

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The cross-sectional behaviour of laminated glass (LG) is characterised by a significant zigzag effect owing to the large stiffness mismatch between the glass and polymer layers. The approach incorporated in current glass design standards is based on the use of a monolithic model with an effective thickness, which suffers several sources of inaccuracy and limitations. In this paper, laminated shell elements with an alternating stiff/soft lay-up are enhanced and used to model LG structures, so as to accurately reproduce the through-thickness behaviour of LG with a minimal number of zigzag displacement parameters per node. In order to consider the influence of loading rate and temperature on the response of LG, a linear viscoelastic material model is adopted to simulate the polymer interlayer, which is formulated based on a recursive formula for stress calculation. Finally, several applications of the proposed modelling approach for two-ply and multi-ply LG structures are presented, considering typical deflection, stability and creep problems, where the benefits of the proposed approach are demonstrated through comparisons against monolithic shell models based on an effective thickness as well as 3D continuum models. (C) 2016 Elsevier Ltd. All rights reserved.
机译：夹层玻璃（LG）的截面行为的特征是由于玻璃层和聚合物层之间的刚度不匹配而产生明显的锯齿形效应。当前玻璃设计标准中采用的方法是基于具有有效厚度的整体模型的使用，该模型存在多种不准确性和局限性。在本文中，具有交替交替的刚性/软叠层的叠层壳单元得到了增强，并用于建模LG结构，从而以每个节点最少的锯齿形位移参数精确地再现LG的整个厚度行为。为了考虑加载速率和温度对LG响应的影响，采用线性粘弹性材料模型来模拟聚合物夹层，该模型是基于递归公式建立的，用于应力计算。最后，考虑了典型的挠度，稳定性和蠕变问题，针对两层和多层LG结构，提出了所提出的建模方法的几种应用，其中通过与基于有效载荷的整体式壳模型进行比较，证明了所提出方法的优势厚度以及3D连续模型。 （C）2016 Elsevier Ltd.保留所有权利。

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