A novel shape optimization approach for strained gridshells: Design and construction of a simply supported gridshell

Rombouts, Jef; Lombaert, Geert; De Laet, Lars; Schevenels, Mattias

doi:10.1016/j.engstruct.2019.04.101

Cited by 34 publications

(12 citation statements)

References 24 publications

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“…Such complex shapes are also conceivable with selfshaping. However, in this context, the programming of self-shaping gridshells by numerical analysis will need to be integrated in application-based form-finding procedures that are traditionally used for standard design of gridshell geometry under service loading conditions [51][52][53][54][55][56]. Especially, the minimizing of overall strain energy, here induced by the self-shaping, and with it the additional contributions of in-plane bending moments identified above, might be relevant for form-finding design [57].…”

Section: Resultsmentioning

confidence: 99%

Computational analysis of hygromorphic self-shaping wood gridshell structures

et al. 2020

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Bi-layered composites capable of self-shaping are of increasing relevance to science and engineering. They can be made out of anisotropic materials that are responsive to changes in a state variable, e.g. wood, which swells and shrinks by changes in moisture. When extensive bending is desired, such bilayers are usually designed as cross-ply structures. However, the nature of cross-ply laminates tends to prevent changes of the Gaussian curvature so that a plate-like geometry of the composite will be partly restricted from shaping. Therefore, an effective approach for maximizing bending is to keep the composite in a narrow strip configuration so that Gaussian curvature can remain constant during shaping. This represents a fundamental limitation for many applications where self-shaped double-curved structures could be beneficial, e.g. in timber architecture. In this study, we propose to achieve double-curvature by gridshell configurations of narrow self-shaping wood bilayer strips. Using numerical mechanical simulations, we investigate a parametric phase-space of shaping. Our results show that double curvature can be achieved and that the change in Gaussian curvature is dependent on the system’s geometry. Furthermore, we discuss a novel architectural application potential in the form of self-erecting timber gridshells.

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Section: Resultsmentioning

confidence: 99%

Computational analysis of hygromorphic self-shaping wood gridshell structures

et al. 2020

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“…The use of structural grillage models to analyse the cross-sectional distribution of girders began in the 1960s [2]. These models divide the girder deck into longitudinal and transverse girders (Figure 1).…”

Section: Current Methods For Girder Bridge Deck Analysismentioning

confidence: 99%

“…As explained in [1], the design process relies solely on the designers' experience, intuition, and ingenuity, resulting in significant material costs, time, and human effort. Structural grillage models [2][3][4] are commonly used to calculate the cross-sectional distribution of live loads between the different girders making up the cross section of the deck [5][6][7]. Another way to approach the design and calculation of such decks would be to apply different formulations [8][9][10] contained in the bridge design standards that approximate the cross-sectional distribution of the bending moment and shear stress caused by live loads through what is known as the load distribution factor (LDF) [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Novel Method for an Optimised Calculation of the Cross-Sectional Distribution of Live Loads on Girder Bridge Decks

Gaute-Alonso

Calderon-Uriszar-Aldaca

Castillo

2022

Civ Eng J

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One of the main goals in the design of girder bridge deck systems is to determine the cross-sectional distribution of live loads across the different girders that make up the cross-section of the deck. Structural grillage models and current bridge design standards based on a Load Distribution Factor (LDF) provide oversized designs, as demonstrated in this paper. This research introduces a novel method that allows the cross-sectional distribution of live loads on girder bridge decks to be calculated by applying a matrix formulation that reduces the structural problem to 2 degrees of freedom for each girder: the deflection and the rotation of the deck-slab at the centre of the girder’s span. Subsequently, a parametric study is presented that analyses the structural response of 64 girder bridge decks to a total of 384 load states. In addition, the authors compare the outputs of the novel method with those obtained using traditional grillage calculation methods. Finally, the method is experimentally validated on two levels: a) a laboratory test that analyses the structural response of a small-scale girder bridge deck to the application of different load states; b) a real full-scale girder bridge load test that analyses the structural response of the bridge over the Barbate River during its static load test. Based on this analysis, the maximum divergence of the proposed method obtained from the experimental structural response is less than 10%. The use of the proposed novel analysis method undoubtedly provides significant savings in material resources and computing time, while contributing to minimizing overall costs. Doi: 10.28991/CEJ-2022-08-03-01 Full Text: PDF

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“…In a recently published paper, the authors describe a novel shape optimization approach for bending-active gridshells [19]. The objective of the current paper is different, but the setup of the structural model is identical.…”

Section: Introductionmentioning

confidence: 99%