Structural Analysis and Form-Finding of Triaxial Elastic Timber Gridshells Considering Interlayer Slips: Numerical Modelling and Full-Scale Test
Elastic timber gridshells are lightweight structures whose stiffness is highly dependent on multiple factors, such as boundary conditions and the semi-rigidity and eccentricity of the joints. Their structural analysis requires calibrated numerical models that incorporate all aspects influencing stif...
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MDPI AG
2022-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/11/5335 |
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| author | Antonio José Lara-Bocanegra Almudena Majano-Majano Juan Ortiz Manuel Guaita |
| author_facet | Antonio José Lara-Bocanegra Almudena Majano-Majano Juan Ortiz Manuel Guaita |
| author_sort | Antonio José Lara-Bocanegra |
| collection | DOAJ |
| description | Elastic timber gridshells are lightweight structures whose stiffness is highly dependent on multiple factors, such as boundary conditions and the semi-rigidity and eccentricity of the joints. Their structural analysis requires calibrated numerical models that incorporate all aspects influencing stiffness. Unfortunately, very little research on experimentally verified numerical models can be found. This paper focuses on the structural behaviour of a novel concept of triaxial elastic long-gridshells supported only on their short sides, called by the authors TEL-gridshells. First, the most relevant details of the construction process and the load test of a full-scale laboratory prototype are presented. Then, two finite element models for structural analysis and form-finding are proposed. Both are based on the modelling of the joints using a series of aligned couplings that allow the integration of the actual joint eccentricity and the interlayer slip by means of springs in all shear planes. The first model replicates the geometry of the prototype built from experimental measurements, focusing on stiffness calibration. The results of the load test are used to verify the proposed model and to analyse the most influential aspects on the stiffness of the structure. The second is a form-finding model that reproduces the construction process of the laboratory prototype, focusing on the residual stresses generated during the deformation process of the structural elements. From the numerical results, the structural behaviour of the prototype is discussed and some of the main aspects to be considered in the design and structural analysis of TEL-gridshells are established. |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T01:32:53Z |
| publishDate | 2022-05-01 |
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| spelling | doaj.art-b557b9c7348e4c158788ad0cfa1810c62023-11-23T13:39:59ZengMDPI AGApplied Sciences2076-34172022-05-011211533510.3390/app12115335Structural Analysis and Form-Finding of Triaxial Elastic Timber Gridshells Considering Interlayer Slips: Numerical Modelling and Full-Scale TestAntonio José Lara-Bocanegra0Almudena Majano-Majano1Juan Ortiz2Manuel Guaita3Department of Building Structures and Physics, School of Architecture, Universidad Politécnica de Madrid, avda. Juan de Herrera 4, 28040 Madrid, SpainDepartment of Building Structures and Physics, School of Architecture, Universidad Politécnica de Madrid, avda. Juan de Herrera 4, 28040 Madrid, SpainDepartment of Agroforestry Engineering, University of Santiago de Compostela, calle Benigno Ledo, 27002 Lugo, SpainDepartment of Agroforestry Engineering, University of Santiago de Compostela, calle Benigno Ledo, 27002 Lugo, SpainElastic timber gridshells are lightweight structures whose stiffness is highly dependent on multiple factors, such as boundary conditions and the semi-rigidity and eccentricity of the joints. Their structural analysis requires calibrated numerical models that incorporate all aspects influencing stiffness. Unfortunately, very little research on experimentally verified numerical models can be found. This paper focuses on the structural behaviour of a novel concept of triaxial elastic long-gridshells supported only on their short sides, called by the authors TEL-gridshells. First, the most relevant details of the construction process and the load test of a full-scale laboratory prototype are presented. Then, two finite element models for structural analysis and form-finding are proposed. Both are based on the modelling of the joints using a series of aligned couplings that allow the integration of the actual joint eccentricity and the interlayer slip by means of springs in all shear planes. The first model replicates the geometry of the prototype built from experimental measurements, focusing on stiffness calibration. The results of the load test are used to verify the proposed model and to analyse the most influential aspects on the stiffness of the structure. The second is a form-finding model that reproduces the construction process of the laboratory prototype, focusing on the residual stresses generated during the deformation process of the structural elements. From the numerical results, the structural behaviour of the prototype is discussed and some of the main aspects to be considered in the design and structural analysis of TEL-gridshells are established.https://www.mdpi.com/2076-3417/12/11/5335strained gridshellactive bendinglightweight structuresprototype<i>Eucalyptus globulus</i>stress relaxation |
| spellingShingle | Antonio José Lara-Bocanegra Almudena Majano-Majano Juan Ortiz Manuel Guaita Structural Analysis and Form-Finding of Triaxial Elastic Timber Gridshells Considering Interlayer Slips: Numerical Modelling and Full-Scale Test Applied Sciences strained gridshell active bending lightweight structures prototype <i>Eucalyptus globulus</i> stress relaxation |
| title | Structural Analysis and Form-Finding of Triaxial Elastic Timber Gridshells Considering Interlayer Slips: Numerical Modelling and Full-Scale Test |
| title_full | Structural Analysis and Form-Finding of Triaxial Elastic Timber Gridshells Considering Interlayer Slips: Numerical Modelling and Full-Scale Test |
| title_fullStr | Structural Analysis and Form-Finding of Triaxial Elastic Timber Gridshells Considering Interlayer Slips: Numerical Modelling and Full-Scale Test |
| title_full_unstemmed | Structural Analysis and Form-Finding of Triaxial Elastic Timber Gridshells Considering Interlayer Slips: Numerical Modelling and Full-Scale Test |
| title_short | Structural Analysis and Form-Finding of Triaxial Elastic Timber Gridshells Considering Interlayer Slips: Numerical Modelling and Full-Scale Test |
| title_sort | structural analysis and form finding of triaxial elastic timber gridshells considering interlayer slips numerical modelling and full scale test |
| topic | strained gridshell active bending lightweight structures prototype <i>Eucalyptus globulus</i> stress relaxation |
| url | https://www.mdpi.com/2076-3417/12/11/5335 |
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