Analytical and numerical analysis on the collapse modes of least-thickness circular masonry arches at decreasing friction
Departing from pioneering Heyman modern rational investigations on the purely-rotational collapse mode of least-thickness circular masonry arches, the hypothesis that joint friction shall be high enough to prevent inter-block sliding is released. The influence of a reducing Coulomb friction coeffici...
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Gruppo Italiano Frattura
2020-01-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2554 |
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| author | Giuseppe Cocchetti Egidio Rizzi |
| author_facet | Giuseppe Cocchetti Egidio Rizzi |
| author_sort | Giuseppe Cocchetti |
| collection | DOAJ |
| description | Departing from pioneering Heyman modern rational investigations on the purely-rotational collapse mode of least-thickness circular masonry arches, the hypothesis that joint friction shall be high enough to prevent inter-block sliding is released. The influence of a reducing Coulomb friction coefficient on the collapse modes of the arch is explicitly inspected, both analytically and numerically, by tracing the appearance of purely-rotational, mixed sliding-rotational and purely-sliding modes. A classical doubly built-in, symmetric, complete semi-circular arch, with radial joints, under self-weight is specifically considered, for a main illustration. The characteristic values of the friction coefficient that limit the ranges associated to each collapse mode are first analytically derived and then numerically identified, with self-consistent outcomes. Explicit analytical representations are provided to estimate the geometric parameters that define the limit equilibrium states of the arch, specifically the minimum thickness to radius ratio, at reducing friction. These formulas, starting from the analysis of classical Heymanian instance of purely-rotational collapse, make new explicit reference to the mixed sliding-rotational collapse mode, arising within a narrow range of limited friction coefficients (or friction angles). The obtained results are consistently compared to existing numerical ones from the competent literature. |
| format | Article |
| id | doaj-art-d9902f9f8d5a49098016712626e7482a |
| institution | DOAJ |
| issn | 1971-8993 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Gruppo Italiano Frattura |
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| series | Fracture and Structural Integrity |
| spelling | doaj-art-d9902f9f8d5a49098016712626e7482a2025-08-20T02:51:42ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932020-01-01145135637510.3221/IGF-ESIS.51.262554Analytical and numerical analysis on the collapse modes of least-thickness circular masonry arches at decreasing frictionGiuseppe Cocchetti0Egidio Rizzi1Politecnico di MilanoUniversity of BergamoDeparting from pioneering Heyman modern rational investigations on the purely-rotational collapse mode of least-thickness circular masonry arches, the hypothesis that joint friction shall be high enough to prevent inter-block sliding is released. The influence of a reducing Coulomb friction coefficient on the collapse modes of the arch is explicitly inspected, both analytically and numerically, by tracing the appearance of purely-rotational, mixed sliding-rotational and purely-sliding modes. A classical doubly built-in, symmetric, complete semi-circular arch, with radial joints, under self-weight is specifically considered, for a main illustration. The characteristic values of the friction coefficient that limit the ranges associated to each collapse mode are first analytically derived and then numerically identified, with self-consistent outcomes. Explicit analytical representations are provided to estimate the geometric parameters that define the limit equilibrium states of the arch, specifically the minimum thickness to radius ratio, at reducing friction. These formulas, starting from the analysis of classical Heymanian instance of purely-rotational collapse, make new explicit reference to the mixed sliding-rotational collapse mode, arising within a narrow range of limited friction coefficients (or friction angles). The obtained results are consistently compared to existing numerical ones from the competent literature.https://www.fracturae.com/index.php/fis/article/view/2554circular masonry archescouplet-heyman problemreducing frictionpurely-rotational modemixed sliding-rotational modepurely-sliding mode. |
| spellingShingle | Giuseppe Cocchetti Egidio Rizzi Analytical and numerical analysis on the collapse modes of least-thickness circular masonry arches at decreasing friction Fracture and Structural Integrity circular masonry arches couplet-heyman problem reducing friction purely-rotational mode mixed sliding-rotational mode purely-sliding mode. |
| title | Analytical and numerical analysis on the collapse modes of least-thickness circular masonry arches at decreasing friction |
| title_full | Analytical and numerical analysis on the collapse modes of least-thickness circular masonry arches at decreasing friction |
| title_fullStr | Analytical and numerical analysis on the collapse modes of least-thickness circular masonry arches at decreasing friction |
| title_full_unstemmed | Analytical and numerical analysis on the collapse modes of least-thickness circular masonry arches at decreasing friction |
| title_short | Analytical and numerical analysis on the collapse modes of least-thickness circular masonry arches at decreasing friction |
| title_sort | analytical and numerical analysis on the collapse modes of least thickness circular masonry arches at decreasing friction |
| topic | circular masonry arches couplet-heyman problem reducing friction purely-rotational mode mixed sliding-rotational mode purely-sliding mode. |
| url | https://www.fracturae.com/index.php/fis/article/view/2554 |
| work_keys_str_mv | AT giuseppecocchetti analyticalandnumericalanalysisonthecollapsemodesofleastthicknesscircularmasonryarchesatdecreasingfriction AT egidiorizzi analyticalandnumericalanalysisonthecollapsemodesofleastthicknesscircularmasonryarchesatdecreasingfriction |