集成流体驱动器自适应混凝土梁的破坏行为:非线性三维有限元分析

IF 2.2 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Frontiers in Built Environment Pub Date : 2023-10-10 DOI:10.3389/fbuil.2023.1272785
Serena Gambarelli, R. Noé Fararoni Platas, Arvinth Shankar, Spasena Dakova, Michael Böhm, Oliver Sawodny, Markus Nitzlader, Lucio Blandini
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引用次数: 0

摘要

本文通过三维非线性有限元分析,对集成流体驱动器的混凝土梁的自适应特性进行了数值研究。混凝土力学行为的数值方法基于微平面理论,在内部软件宏观空间分析(MASA)中实现。对不同的病例进行了分析,并将结果与文献中的实验结果进行了比较。为了校正和验证所采用的非线性微平面材料模型,首先对无作动器的参考混凝土梁进行了数值分析。在此基础上,利用该模型对集成流体执行器混凝土梁进行了不同载荷情况下的非线性分析。得到的结果证实了该模型能够在所有分析情况下再现梁的变形行为。一个基本的方面是对执行器和相关的施加压力进行逼真的建模。使用非线性材料模型可以真实地捕获可能的裂缝和随后的梁的破坏。值得一提的是,一个完整的模型验证应该扩展到驱动结构元件的长期行为。从未来的角度来看,基于耦合三维水-热-力模型的成熟的混凝土数值框架可用于1)研究自适应结构部件在更复杂的加载条件下的性能,例如:循环;2)在不同的机械和/或环境载荷条件下进行耐久性分析。
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Failure behavior of an adaptive concrete beam with integrated fluidic actuators: non-linear three-dimensional finite element analysis
In the present study, the adaptive behavior of a concrete beam with integrated fluidic actuators was numerically investigated through three-dimensional (3D) non-linear finite element (FE) analysis. The employed numerical approach for the mechanical behavior of concrete is based on the microplane theory, implemented in the in-house software MAcroscopic Space Analysis (MASA). Different cases were analyzed and the results compared with experimental tests available in the literature. First, a reference concrete beam without actuators was numerically analyzed in order to calibrate and validate the employed non-linear microplane material model. Thereafter, the validated model was used for the non-linear analysis of the concrete beam with integrated fluidic actuators, with respect to different load cases. The obtained results confirm the capability of the model to reproduce the deformational behavior of the beam for all analyzed cases. A fundamental aspect is the realistic modeling of the actuators and related applied pressure. The use of a non-linear material model allows to realistically capture the possible cracking and consequent failure of the beam. It is worth mentioning that a full model validation should be extended to the long-term behavior of actuated structural elements. In future perspective, the well-established numerical framework for concrete, based on coupled 3D hygro-thermo-mechanical model, can be used to 1) investigate the performance of adaptive structural components, with respect to more complex loading conditions, e.g., cyclic; 2) perform durability analysis under exposure to different combinations of mechanical and/or environmental loading conditions.
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来源期刊
Frontiers in Built Environment
Frontiers in Built Environment Social Sciences-Urban Studies
CiteScore
4.80
自引率
6.70%
发文量
266
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