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Analysis of Load Capacity of Roof Trusses with Imperfections and the Issue of Equivalent Load Adoption

Analysis of Load Capacity of Roof Trusses with Imperfections and the Issue of Equivalent Load... AbstractThe internal forces and stresses were analyzed and utilization of the design resistance in selected members of the roof structure with local and global geometrical imperfections was evaluated. Values of these imperfections were based on the information given in the standards EN 1090-2 and EN 1993-1-1. Besides the basic reference model with imperfections, models without imperfections, with different equivalent load arrangements by the authors’ own concept and comparatively according to the standard EN 1993-1-1 were analyzed. The calculations were made using the 1st and the 2nd order analysis. Conclusion concerning accuracy of the internal forces estimation and limit states check by use the equivalent load system proposed in the standard EN 1993-1-1 are presented. Deficiencies in the provisions of this standard in terms of adopting equivalent loads in roof structures with imperfections, resulting in underestimation of the stresses in the bottom chords of the roof trusses, has been demonstrated. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Scientiarum Polonorum Architectura de Gruyter

Analysis of Load Capacity of Roof Trusses with Imperfections and the Issue of Equivalent Load Adoption

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Publisher
de Gruyter
Copyright
© 2021 Grzegorz Gremza et al., published by Sciendo
eISSN
2544-1760
DOI
10.22630/aspa.2021.20.1.7
Publisher site
See Article on Publisher Site

Abstract

AbstractThe internal forces and stresses were analyzed and utilization of the design resistance in selected members of the roof structure with local and global geometrical imperfections was evaluated. Values of these imperfections were based on the information given in the standards EN 1090-2 and EN 1993-1-1. Besides the basic reference model with imperfections, models without imperfections, with different equivalent load arrangements by the authors’ own concept and comparatively according to the standard EN 1993-1-1 were analyzed. The calculations were made using the 1st and the 2nd order analysis. Conclusion concerning accuracy of the internal forces estimation and limit states check by use the equivalent load system proposed in the standard EN 1993-1-1 are presented. Deficiencies in the provisions of this standard in terms of adopting equivalent loads in roof structures with imperfections, resulting in underestimation of the stresses in the bottom chords of the roof trusses, has been demonstrated.

Journal

Acta Scientiarum Polonorum Architecturade Gruyter

Published: Mar 1, 2021

Keywords: truss imperfections; equivalent load; 2 nd order analysis; limit state

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