Integrated analysis of kinematic form active structures for architectural applications: Design of a representative case study

Puystiens, Silke; Craenenbroeck, Maarten Van; Laêt, Lars De; Hemelrijck, Danny Van; Paepegem, Wim Van; Mollaert, Marijke

doi:10.1016/j.engstruct.2016.06.038

Cited by 3 publications

(8 citation statements)

References 8 publications

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“…By redesigning the prototype and removing the geometrical constraint imposed by the fixed frame [11], we were able to overcome the limitations imposed by the original structural system which restricted the movement of the units. For this re-evaluation of the system a single foldable unit, consisting of two flat triangular pieces, has been isolated and investigated.…”

Section: Concept: Description Of the Case Studymentioning

confidence: 99%

“…The computational simulation of the prototype has been conducted in Easy 2015, which approximates the fabric by a cable net and applies a linear elastic orthotropic material model for all parts of the model (fabric, boundary cables and rigid beam elements) [11]. Using the ''extended" material model rather than the software's default one allows for the addition of shear and crimp stiffness to the linear elastic cable net model.…”

Section: Computational Modelmentioning

confidence: 99%

“…Thus solely by reorienting the reaction forces, the shape of the structure changes along a path which is preferred by the structure itself. Hence an optimal actuation path was derived during the design stage along which the prototype should move in order to retain prestress despite the large geometrical displacement [11].…”

Section: Concept: Description Of the Case Studymentioning

confidence: 99%

“…Due to the location and orientation of these hinges, the trajectory of the apex corners of one unit during deployment was restricted to a circular motion around the axis formed by the two base points. However, a parameter study [11] showed that it is more optimal to make the movement forcecontrolled rather than using a geometrically derived trajectory. The designed opening and closing method thus needs to allow for a greater variety of movements than just the circular motion used in the initial structure.…”

Section: Introducing the Kinematicsmentioning

confidence: 98%

“…The experimental results are compared to the predictions from the computational model composed during the design stage [11]. The first part shortly explains the origin of the test case and the envisioned results.…”

Section: Introductionmentioning

confidence: 99%

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

Craenenbroeck

Puystiens

Laêt

et al. 2016

Engineering Structures

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a b s t r a c tTechnical textiles used in lightweight tensile fabric structures are inherently highly flexible, which makes these materials very suited to, for instance, make lightweight adaptable façade 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.

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Section: Concept: Description Of the Case Studymentioning

confidence: 99%

Section: Computational Modelmentioning

confidence: 99%

Section: Concept: Description Of the Case Studymentioning

confidence: 99%

Section: Introducing the Kinematicsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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

Craenenbroeck

Puystiens

Laêt

et al. 2016

Engineering Structures

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Implementation of bending-active elements in kinematic form-active structures – Part I: Design of a representative case study

Puystiens

Craenenbroeck

Hemelrijck

et al. 2019

Composite Structures

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Due to their low self-weight and their inherently high flexibility, technical textiles offer great possibilities for the integration in kinematic structures. Furthermore, the implementation of active bending in a transformable design creates new challenging perspectives.The paper describes an integrated approach for transformable textile hybrids where an improved design is obtained through a parameter study, performing a structural analysis in the different phases of the deployment. The studied parameters include (i) the form-finding position, (ii) the prestress (ratio), (iii) the used materials and sections (including the fibre directions) and (iv) the number of bending-active elements.This research confirms the feasibility of realizing kinematic form-active structures with integrated bending-active elements, where both the membrane and the supporting structure are stable in the different configurations. Due to the high interaction between the bending-active supporting system and the pretensioned membrane, the different parameters influence each other significantly.In a next step, an experimental verification of the designed pringle-shaped textile hybrid is carried out in order to both confirm the possibilities and reveal the remaining challenges.

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Analysis and design of fabric membrane structures: A systematic review on material and structural performance

Zhang

et al. 2022

Thin-Walled Structures

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Integrated analysis of kinematic form active structures for architectural applications: Design of a representative case study

Cited by 3 publications

References 8 publications

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

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

Implementation of bending-active elements in kinematic form-active structures – Part I: Design of a representative case study

Analysis and design of fabric membrane structures: A systematic review on material and structural performance

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