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On the Nonlinear Behaviour of Domes Subjected to Point Loads on the Crown

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Proceedings of the International Conference of Steel and Composite for Engineering Structures (ICSCES 2023)

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 486))

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Abstract

A new model for nonlinear static analysis of masonry domes subjected to point loads on the crown is presented. Its simplicity makes it usable in common practise by unexperienced users. Masonry is modelled with elastic hexahedral elements connected by 1D elements representing mortar joints, both meridian and horizontal, on which nonlinearities are concentrated. The aim is to simulate the nonlinear behaviour of domes under vertical loads by using a Finite Element commercial software equipped only with the simplest finite elements, namely point contacts and cutoff bars. The mortar joints nonlinearity is reproduced by two different models. The first of which accounts for elastic perfectly brittle point contacts under Heyman’s hypothesis of no-tension material. Whereas the second exploits elastic perfectly ductile cutoff bars, by which different tensile strengths and masonry orthotropy are considered. In this last model, to evaluate the increase in load carrying capacity, Fibre Reinforced Polymers (FRP) strips are applied. While in the first model, the position of plastic hinge is well defined at the expense of the ultimate load, in the second model, the plastic hinge is smeared in favour of a major precision and accuracy in the computation of collapse load. The models are benchmarked on a masonry dome experimentally tested. The procedure is validated by comparison of results with a wide range of Finite Elements, numerical approaches and limit analysis available in the literature for the same dome. By the analysis of nonlinear behaviour emerging from load-displacement curves, the robustness and simplicity of the procedure is proven.

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Authors and Affiliations

  1. Department of Architecture Built Environment and Construction Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy

    Alessandro Gandolfi, Natalia Pingaro & Gabriele Milani

Authors
  1. Alessandro Gandolfi
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  2. Natalia Pingaro
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  3. Gabriele Milani
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Corresponding author

Correspondence to Alessandro Gandolfi .

Editor information

Editors and Affiliations

  1. Design Engineering Laboratory, Toyota Technological Institute, Nagoya, Japan

    Brahim Benaissa

  2. DICEA, UniversitĂ  Politecnica delle Marche, Ancona, Italy

    Roberto Capozucca

  3. CEATS Center, Ho Chi Minh City Open University, Ho Chi Minh City, Vietnam

    Samir Khatir

  4. Dept. ABC, Politecnico di Milano, Milan, Italy

    Gabriele Milani

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Gandolfi, A., Pingaro, N., Milani, G. (2024). On the Nonlinear Behaviour of Domes Subjected to Point Loads on the Crown. In: Benaissa, B., Capozucca, R., Khatir, S., Milani, G. (eds) Proceedings of the International Conference of Steel and Composite for Engineering Structures. ICSCES 2023. Lecture Notes in Civil Engineering, vol 486. Springer, Cham. https://doi.org/10.1007/978-3-031-57224-1_19

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  • DOI: https://doi.org/10.1007/978-3-031-57224-1_19

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-031-57223-4

  • Online ISBN: 978-3-031-57224-1

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