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

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Behaviour of Masonry Arch Bridges Subject to Flood Flow and Floating Debris Impact./
作者:	Majtan, Eda.
面頁冊數:	1 online resource (299 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-11, Section: A.
Contained By:	Dissertations Abstracts International85-11A.
標題:	Load. -
電子資源:	click for full text (PQDT)
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. - 1 online resource (299 pages)

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

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

Includes bibliographical references

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.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798382640457Subjects--Topical Terms:

1437809
Load.
Index Terms--Genre/Form:

554714
Electronic books.

Behaviour of Masonry Arch Bridges Subject to Flood Flow and Floating Debris Impact.
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245 1 0 $a Behaviour of Masonry Arch Bridges Subject to Flood Flow and Floating Debris Impact.
264 0 $c 2023
300 $a 1 online resource (299 pages)
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500 $a Source: Dissertations Abstracts International, Volume: 85-11, Section: A.
500 $a Advisor: Rogers, Benedict;Cunningham, Lee.
502 $a Thesis (Ph.D.)--The University of Manchester (United Kingdom), 2023.
504 $a Includes bibliographical references
520 $a 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.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Load. $3 1437809
650 4 $a Mechanical properties. $3 1004682
650 4 $a Wavelet transforms. $3 1372683
650 4 $a Floods. $3 972039
650 4 $a Pressure distribution. $3 1413590
650 4 $a Stress-strain curves. $3 1475136
650 4 $a Boundary conditions. $3 1372586
650 4 $a Shear tests. $3 1465527
650 4 $a Masonry. $3 680632
650 4 $a Viscosity. $3 641960
650 4 $a Sensitivity analysis. $3 1465552
650 4 $a Fourier transforms. $3 1372561
650 4 $a Sensors. $3 1003702
650 4 $a Deformation. $3 1328788
650 4 $a Fluid mechanics. $3 555551
650 4 $a Bridges. $3 1028796
650 4 $a Reynolds number. $3 839681
650 4 $a Shear strength. $3 998614
650 4 $a Reading. $3 560421
650 4 $a Mathematics. $3 527692
655 7 $a Electronic books. $2 local $3 554714
690 $a 0204
690 $a 0729
690 $a 0405
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a The University of Manchester (United Kingdom). $3 1213791
773 0 $t Dissertations Abstracts International $g 85-11A.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31040065 $z click for full text (PQDT)