Failure behavior of an adaptive concrete beam with integrated fluidic actuators: non-linear three-dimensional finite element analysis

Frontiers in Built Environment

Built Environment

Lucio Blandini¹  Markus Nitzlader¹  Spasena Dakova²  Michael Böhm²  Oliver Sawodny²  Serena Gambarelli³  R. Noé Fararoni Platas³  Arvinth Shankar³ 

[1] Institute for Lightweight Structures and Conceptual Design, University of Stuttgart, Stuttgart, Germany;Institute for System Dynamics, University of Stuttgart, Stuttgart, Germany;Material Behavior and Modeling Unit, Materials Testing Institute, University of Stuttgart, Stuttgart, Germany;

关键词: adaptivity;    concrete;    numerical simulations;    finite element method;    microplane material model;    cracking;   

DOI  :  10.3389/fbuil.2023.1272785

 received in 2023-08-04, accepted in 2023-09-27,  发布年份 2023

来源: Frontiers

【 摘 要 】

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.

【 授权许可】

Unknown   
Copyright © 2023 Gambarelli, Fararoni Platas, Shankar, Dakova, Böhm, Sawodny, Nitzlader and Blandini.