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首页> 外文期刊>Engineering Structures >Static and dynamic analyses of insulated concrete sandwich panels using a unified non-linear finite element model
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Static and dynamic analyses of insulated concrete sandwich panels using a unified non-linear finite element model

机译：应用统一非线性有限元模型对隔热混凝土夹芯板进行静动力分析

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Insulated concrete sandwich panels are comprised of two outer concrete wythes and an inner layer of foam insulation. They have been increasingly used because of their advantages of light weight and energy efficiency. Various shear connectors can be used to connect the two outer concrete wythes. More recently, Fiber-Reinforced Polymer (FRP) shear connectors have been used, which can eliminate thermal bridging and improve the thermal performance. Typical approaches to Finite Element (FE) analysis treat static and dynamic analyses separately. However, due to the flexibility of the FRP shear connectors and the cracking of the concrete in insulated concrete sandwich panels, a nonlinear static analysis model would often diverge early based on a preliminary FE study conducted by the authors. To address this issue, a nonlinear explicit dynamic FE model using ABAQUS (c) was developed, which can study both the panels' static behavior under typical flexural loading and dynamic behavior under blast loading. Nonlinear material properties were incorporated and damaged plasticity model was used to model concrete in both compression and tension. In order to simulate the static behavior, the time loading control was applied to the FE model to slow down the rate of loading to smoothly capture the response. For dynamic analysis under blast loading, a verification study was conducted first using the developed FE model, where good correlations can be obtained between the FE and test results on a panel tested in a previous study. The FE model was further used to study the dynamic behavior of two panels under blast loading: one is a solid concrete panel and the other is an insulated concrete sandwich panel. It can be concluded that, although the insulated concrete sandwich panel is lighter, it still performs relatively well compared to the solid panel under blast loading. Therefore, it is promising to use insulated concrete sandwich panels for both conventional and blast-resistant structures. (C) 2016 Elsevier Ltd. All rights reserved.
机译：隔热混凝土夹芯板由两个外部混凝土结构和一层泡沫绝缘材料组成。由于其重量轻和能效高的优势，它们已被越来越多地使用。可以使用各种剪切连接器来连接两个外部混凝土。最近，已经使用了纤维增强聚合物（FRP）剪切连接器，该连接器可以消除热桥连并改善热性能。有限元（FE）分析的典型方法分别处理静态和动态分析。但是，由于FRP剪力连接器的柔韧性以及隔热混凝土夹心板中混凝土的开裂，基于作者进行的初步有限元研究，非线性静力分析模型通常会较早发散。为了解决这个问题，开发了使用ABAQUS（c）的非线性显式动态有限元模型，该模型可以研究面板在典型弯曲载荷下的静态行为和爆炸载荷下的动态行为。纳入了非线性材料特性，并使用受损塑性模型对混凝土进行压缩和拉伸建模。为了模拟静态行为，将时间加载控件应用于有限元模型，以减慢加载速率以平稳地捕获响应。对于爆炸载荷下的动态分析，首先使用发达的有限元模型进行验证研究，在有限元模型和先前研究中测试的测试结果之间可以得到良好的相关性。有限元模型还用于研究爆炸荷载作用下的两块面板的动力特性：一个是实心混凝土面板，另一个是隔热混凝土夹心面板。可以得出结论，尽管隔热混凝土夹心板较轻，但在爆炸荷载下其性能仍比实心板好。因此，有望在常规结构和防爆结构中使用隔热混凝土夹心板。 （C）2016 Elsevier Ltd.保留所有权利。

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