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Integrated analysis of kinematic form active structures for architectural applications : experimental verification

(2016) ENGINEERING STRUCTURES. 123. p.59-70
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Abstract
Technical textiles used in lightweight tensile fabric structures are inherently highly flexible, which makes these materials very suited to, for instance, make lightweight adaptable facade or roof systems. Until now, however, kinematic fabric structures are mostly designed to transform between a prestressed, structural state and a compact state where the fabric becomes untensioned using fixed geometrically determined paths. The goal of this research is to design and validate the structural behaviour of a kinematic fabric structure which remains prestressed in all its possible geometric states by taking advantage of the out-of-plane flexibility of the material rather than the high stretchability. To make the design and the use of such a kinematic fabric structures possible, we investigated the material properties of a standard polyester-PVC fabric. Afterwards, we implemented these properties in a computational model and performed a parameter study to come to a conceptual design of a kinematic prestressed fabric structure where its geometry follows the reorientation of forces rather than restricting its movement to a geometrically determined path. Finally, the designed kinematic structure was built and tested as a prototype, comparing reaction forces and strains to the ones predicted in the computational model. This paper describes this experimental validation by comparing the experimentally obtained results to the values predicted in the computational simulations using a cable-net approximation and a linear elastic orthotropic material model. Although this comparison showed some deviations in the absolute values of the forces and strains, the general behaviour of the prototype was correctly predicted using a standard analysis method. The majority of the deviations could be contributed to the fact that the strains in the computational model do not take into account the compensation applied to the prototype and the high permanent straining of the boundary belts. The investigated prototype thus showed both the potential and the difficulties of using lightweight, highly flexible fabrics as structurally stable, kinematic elements. (C) 2016 Elsevier Ltd. All rights reserved.
Keywords
DIGITAL IMAGE CORRELATION, FINITE-ELEMENT-ANALYSIS, MEMBRANE STRUCTURES, SHEAR BEHAVIOR, FABRICS, MODEL, Fabric structures, Kinematic structures, Adaptable structures, Numerical, simulation, Experimental validation, Digital Image Correlation

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MLA
Van Craenenbroeck, Maarten, et al. “Integrated Analysis of Kinematic Form Active Structures for Architectural Applications : Experimental Verification.” ENGINEERING STRUCTURES, vol. 123, Elsevier Sci Ltd, 2016, pp. 59–70, doi:10.1016/j.engstruct.2016.05.032.
APA
Van Craenenbroeck, M., Puystiens, S., De Laet, L., Van Hemelrijck, D., Van Paepegem, W., & Mollaert, M. (2016). Integrated analysis of kinematic form active structures for architectural applications : experimental verification. ENGINEERING STRUCTURES, 123, 59–70. https://doi.org/10.1016/j.engstruct.2016.05.032
Chicago author-date
Van Craenenbroeck, Maarten, Silke Puystiens, Lars De Laet, Danny Van Hemelrijck, Wim Van Paepegem, and Marijke Mollaert. 2016. “Integrated Analysis of Kinematic Form Active Structures for Architectural Applications : Experimental Verification.” ENGINEERING STRUCTURES 123: 59–70. https://doi.org/10.1016/j.engstruct.2016.05.032.
Chicago author-date (all authors)
Van Craenenbroeck, Maarten, Silke Puystiens, Lars De Laet, Danny Van Hemelrijck, Wim Van Paepegem, and Marijke Mollaert. 2016. “Integrated Analysis of Kinematic Form Active Structures for Architectural Applications : Experimental Verification.” ENGINEERING STRUCTURES 123: 59–70. doi:10.1016/j.engstruct.2016.05.032.
Vancouver
1.
Van Craenenbroeck M, Puystiens S, De Laet L, Van Hemelrijck D, Van Paepegem W, Mollaert M. Integrated analysis of kinematic form active structures for architectural applications : experimental verification. ENGINEERING STRUCTURES. 2016;123:59–70.
IEEE
[1]
M. Van Craenenbroeck, S. Puystiens, L. De Laet, D. Van Hemelrijck, W. Van Paepegem, and M. Mollaert, “Integrated analysis of kinematic form active structures for architectural applications : experimental verification,” ENGINEERING STRUCTURES, vol. 123, pp. 59–70, 2016.
@article{8533630,
  abstract     = {{Technical textiles used in lightweight tensile fabric structures are inherently highly flexible, which makes these materials very suited to, for instance, make lightweight adaptable facade or roof systems. Until now, however, kinematic fabric structures are mostly designed to transform between a prestressed, structural state and a compact state where the fabric becomes untensioned using fixed geometrically determined paths. The goal of this research is to design and validate the structural behaviour of a kinematic fabric structure which remains prestressed in all its possible geometric states by taking advantage of the out-of-plane flexibility of the material rather than the high stretchability. To make the design and the use of such a kinematic fabric structures possible, we investigated the material properties of a standard polyester-PVC fabric. Afterwards, we implemented these properties in a computational model and performed a parameter study to come to a conceptual design of a kinematic prestressed fabric structure where its geometry follows the reorientation of forces rather than restricting its movement to a geometrically determined path. Finally, the designed kinematic structure was built and tested as a prototype, comparing reaction forces and strains to the ones predicted in the computational model. This paper describes this experimental validation by comparing the experimentally obtained results to the values predicted in the computational simulations using a cable-net approximation and a linear elastic orthotropic material model. Although this comparison showed some deviations in the absolute values of the forces and strains, the general behaviour of the prototype was correctly predicted using a standard analysis method. The majority of the deviations could be contributed to the fact that the strains in the computational model do not take into account the compensation applied to the prototype and the high permanent straining of the boundary belts. The investigated prototype thus showed both the potential and the difficulties of using lightweight, highly flexible fabrics as structurally stable, kinematic elements. (C) 2016 Elsevier Ltd. All rights reserved.}},
  author       = {{Van Craenenbroeck, Maarten and Puystiens, Silke and De Laet, Lars and Van Hemelrijck, Danny and Van Paepegem, Wim and Mollaert, Marijke}},
  issn         = {{0141-0296}},
  journal      = {{ENGINEERING STRUCTURES}},
  keywords     = {{DIGITAL IMAGE CORRELATION,FINITE-ELEMENT-ANALYSIS,MEMBRANE STRUCTURES,SHEAR BEHAVIOR,FABRICS,MODEL,Fabric structures,Kinematic structures,Adaptable structures,Numerical,simulation,Experimental validation,Digital Image Correlation}},
  language     = {{eng}},
  pages        = {{59--70}},
  publisher    = {{Elsevier Sci Ltd}},
  title        = {{Integrated analysis of kinematic form active structures for architectural applications : experimental verification}},
  url          = {{http://dx.doi.org/10.1016/j.engstruct.2016.05.032}},
  volume       = {{123}},
  year         = {{2016}},
}

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