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Behaviour of Masonry Arch Bridges Su...

Majtan, Eda.

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Behaviour of Masonry Arch Bridges Subject to Flood Flow and Floating Debris Impact.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Behaviour of Masonry Arch Bridges Subject to Flood Flow and Floating Debris Impact./
作者:	Majtan, Eda.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
面頁冊數:	299 p.
附註:	Source: Dissertations Abstracts International, Volume: 85-11, Section: A.
Contained By:	Dissertations Abstracts International85-11A.
標題:	Load. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31040065
ISBN:	9798382640457

Behaviour of Masonry Arch Bridges Subject to Flood Flow and Floating Debris Impact.
Majtan, Eda.

Behaviour of Masonry Arch Bridges Subject to Flood Flow and Floating Debris Impact. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 299 p.

Source: Dissertations Abstracts International, Volume: 85-11, Section: A.

Thesis (Ph.D.)--The University of Manchester (United Kingdom), 2023.

Masonry arch bridges constitute an essential part of existing transport infrastructure, retaining a broad socio-economic impact on the communities they serve. It is estimated that between 200,000 and 500,000 masonry arch bridges are in daily use in mainland Europe and more than 40,000 in the UK. Many of these bridges span watercourses and are now carrying loads far more than those envisaged by their original designers. A significant number of masonry arch bridges have been damaged or destroyed from extreme flood events in recent years. Failure of these bridges causes disruption to transportation networks, services and communities as well as economic losses associated with the cost of bridge replacement and remedial works. These extreme flood events and their risk to masonry arch bridges have motivated research into scour effects and the quantification of that type of damage to a bridgea€™s substructure. However, the effect of flood-induced loads on the bridge superstructure has yet to be fully understood.To investigate this complex phenomenon, this thesis employs a novel approach where the flood-induced hydrostatic, hydrodynamic and floating debris impact loads on the bridge and the bridge response to these loads were obtained by means of smoothed particle hydrodynamics (SPH) and non-linear finite element (FE) modelling, respectively. Validation of both the SPH and FE models were undertaken by simulating existing experimental works in the literature. To further validate the SPH method in this novel application and considering the scarcity of available experimental data, an experimental campaign was performed using a recirculating flume at the University of Manchester. The experiments investigated flood-induced forces on a single-span arch bridge with different submergence ratios of the bridge components (abutment, arch barrel, spandrel wall) and debris orientations. With the validated SPH model, a real-life flooding scenario was also examined and associated loads were obtained in terms of detailed pressure-time histories. These pressure-time histories were used as an input load in the non-linear FE model of a single-span masonry arch bridge and the bridge response to these load scenarios was obtained. The results indicate that the debris impact led to greatest increase in the stresses in the bridge with a fully submerged abutment and side-on (0-degree) debris orientation. The influence of the debris impact with end-on (90-degree) orientation on the structural response was relatively low despite its higher peak pressure values. Furthermore, for the type of flow regimes observed in the field, the results indicate significant local tensile stresses can be generated in the spandrel wall and arch barrel leading to structural damage.

ISBN: 9798382640457Subjects--Topical Terms:

3562902
Load.

Behaviour of Masonry Arch Bridges Subject to Flood Flow and Floating Debris Impact.
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650 4 $a Mechanical properties. $3 3549505
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650 4 $a Stress-strain curves. $3 3560389
650 4 $a Boundary conditions. $3 3560411
650 4 $a Shear tests. $3 3681835
650 4 $a Masonry. $3 685951
650 4 $a Viscosity. $3 1050706
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650 4 $a Fluid mechanics. $3 528155
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650 4 $a Reynolds number. $3 3681436
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