Details
| Original language | English |
|---|---|
| Article number | 117918 |
| Number of pages | 16 |
| Journal | Engineering structures |
| Volume | 308 |
| Early online date | 5 Apr 2024 |
| Publication status | E-pub ahead of print - 5 Apr 2024 |
Abstract
Asymptotic geodesic gridshells are a novel structural system that is fabricated from straight and flat planks. The planks are elastically bent and twisted around their slender dimension to achieve the desired geometry, while the tall dimension creates structural stiffness. This system combines the geometric features of asymptotic and geodesic curves to create a hybrid tri-hex network on doubly curved surfaces, and provides a stable grid to resist its self-weight and external loads. To comprehensively explore the structural capabilities of asymptotic geodesic gridshells, a full-scale timber gridshell prototype was designed and built. Loading tests, including local and one shell asymmetrical loading, were carried out to examine the structural behaviour of the gridshell. A nonlinear finite-element model was developed and subsequently validated using experimental data. The evaluation of the timber gridshell revealed its high performance under uniformly distributed loads, and the simulation indicated a viable live load capacity of 7.0 kN/m². In a parametric study, the influence of the polar array layout, the joint rotation stiffness, and the support condition on the structural performance of the hybrid gridshell are analysed. Parameters influencing the achievable span are discussed regarding strength, stiffness and buckling behaviour for future design considerations.
Keywords
- Asymptotic curves, Asymptotic geodesic hybrid gridshells, Construction-aware design, Elastic gridshells, Experimental testing, Geodesic curves, Numerical simulation, Timber structures
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
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In: Engineering structures, Vol. 308, 117918, 01.06.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Structural behaviour of asymptotic geodesic hybrid timber gridshells
AU - Wan, Zongshuai
AU - D'Acunto, Pierluigi
AU - Schling, Eike
N1 - Funding Information: The research has been supported by the University Grants Committee (UGC) of Hong Kong, Early Career Scheme (RGC Ref No. 27604721), the Special Projects Fund at HKU DoA, the Professorship of Structural Design, TUM, as well as our industry partners Holzbau Amann and Metallbau Erhard Brandl. The geometry optimization of the structure was generated by Hui Wang and Helmut Pottmann at KAUST, Saudi Arabia.
PY - 2024/4/5
Y1 - 2024/4/5
N2 - Asymptotic geodesic gridshells are a novel structural system that is fabricated from straight and flat planks. The planks are elastically bent and twisted around their slender dimension to achieve the desired geometry, while the tall dimension creates structural stiffness. This system combines the geometric features of asymptotic and geodesic curves to create a hybrid tri-hex network on doubly curved surfaces, and provides a stable grid to resist its self-weight and external loads. To comprehensively explore the structural capabilities of asymptotic geodesic gridshells, a full-scale timber gridshell prototype was designed and built. Loading tests, including local and one shell asymmetrical loading, were carried out to examine the structural behaviour of the gridshell. A nonlinear finite-element model was developed and subsequently validated using experimental data. The evaluation of the timber gridshell revealed its high performance under uniformly distributed loads, and the simulation indicated a viable live load capacity of 7.0 kN/m². In a parametric study, the influence of the polar array layout, the joint rotation stiffness, and the support condition on the structural performance of the hybrid gridshell are analysed. Parameters influencing the achievable span are discussed regarding strength, stiffness and buckling behaviour for future design considerations.
AB - Asymptotic geodesic gridshells are a novel structural system that is fabricated from straight and flat planks. The planks are elastically bent and twisted around their slender dimension to achieve the desired geometry, while the tall dimension creates structural stiffness. This system combines the geometric features of asymptotic and geodesic curves to create a hybrid tri-hex network on doubly curved surfaces, and provides a stable grid to resist its self-weight and external loads. To comprehensively explore the structural capabilities of asymptotic geodesic gridshells, a full-scale timber gridshell prototype was designed and built. Loading tests, including local and one shell asymmetrical loading, were carried out to examine the structural behaviour of the gridshell. A nonlinear finite-element model was developed and subsequently validated using experimental data. The evaluation of the timber gridshell revealed its high performance under uniformly distributed loads, and the simulation indicated a viable live load capacity of 7.0 kN/m². In a parametric study, the influence of the polar array layout, the joint rotation stiffness, and the support condition on the structural performance of the hybrid gridshell are analysed. Parameters influencing the achievable span are discussed regarding strength, stiffness and buckling behaviour for future design considerations.
KW - Asymptotic curves
KW - Asymptotic geodesic hybrid gridshells
KW - Construction-aware design
KW - Elastic gridshells
KW - Experimental testing
KW - Geodesic curves
KW - Numerical simulation
KW - Timber structures
UR - http://www.scopus.com/inward/record.url?scp=85189759664&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2024.117918
DO - 10.1016/j.engstruct.2024.117918
M3 - Article
AN - SCOPUS:85189759664
VL - 308
JO - Engineering structures
JF - Engineering structures
SN - 0141-0296
M1 - 117918
ER -