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Tytuł:
Experimental investigation of local scour under two oblong piers of a bridge crossing a sharp bend river
Autorzy:
Abdulwahd, Abdulrazaq K.
Maatooq, Jaafar S.
Powiązania:
https://bibliotekanauki.pl/articles/28411623.pdf
Data publikacji:
2023
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
flow intensity
local scour
oblong pier
sharp bend
Opis:
Bridges built across a river bend and supported by more than one pier has been experimentally studied regarding the shape and nature of erosion and deposition. For this purpose, a U-shaped laboratory channel was used with two oblong piers installed at different locations. The first one was at the mid-section of the upstream straight reach, whereas in the second site within the bend, the piers have been installed at sections of central angles 0°, 30°, 60°, 90°, 120°, 150°, 170°, and 180°, from the beginning to the end of the bend segment respectively. The studies were conducted under clear water and threshold flow conditions. The results show that the higher and lower values of local scour around the pier positioned close to the outer bank, are 1.803 and 0.623 times the pier width when the bridge was installed at an angle of 90° and 30° respectively. As for the pier close to the inner bank, the deepest local scour was 1.786 times of the pier width when the bridge was installed at 60° of the bend, while the least one was 0.516 times of the pier width when the bridge was located in the 180° sector. It is worth noting that the presence of piers within sector 150 is less affected by local scour than in the other sections.
Źródło:
Journal of Water and Land Development; 2023, 58; 129--135
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the resistance of concrete hollow thin-walled high piers to rock collisions
Autorzy:
Huang, Yao
Powiązania:
https://bibliotekanauki.pl/articles/27312168.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
podpora betonowa
filar mostowy
element cienkościenny
zderzenie
skała
siła uderzenia
uszkodzenie
odporność na kolizje
concrete pier
thin-walled element
rock
collision
collision force
damage
collision resistance
Opis:
Concrete hollow thin-walled high piers (CHTWHPs) located in mountainous areas may be destroyed by the huge impact force of accidental rocks. The study focuses on analyzing the effects of rock impact on the pier, including its impact force, pier damage, dynamic response, and energy dissipation characteristics. The results show that: (1) Increasing the impact height led to a decrease in the peak impact force. Specifically, 15.5% decrease in the peak collision force is induced when the height of rock collision rises from 10 m to 40 m. (2) The damage mode of the pier’s collision surface is mainly oval damage with symmetrical center, radial damage on the side surface, and corner shear failure on the cross section. (3) The peak displacement of bridge pier increases with the increase of collision height. As the collision height increased from 10 m to 40 m, the bridge pier’s peak displacement also increased, rising by 104.2%. (4) The concrete internal energy gradually decreased with increasing collision height, dropping by 36.9% when the height of rock collision rises from 10 m to 40 m. The reinforcement internal energy showed an increase of 78%. The results of this study may provide reference for the rock collision resistance design of CHTWHPs.
Źródło:
Archives of Civil Engineering; 2023, 69, 3; 187--197
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rok 1973, czyli zamek krzyżujących się losów
The Year 1973, or the Castle of Intersecting Destinies
Autorzy:
Brożek, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/32084571.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Instytut Sztuki PAN
Tematy:
Tik Tok
analfabetyzm
Italo Calvino
Silvio Berlusconi
Pier Paolo Pasolini
Opis:
Rok 1973 staje się symbolicznym punktem wyjścia do podróży wraz z gronem włoskich intelektualistów po z pozoru niepowiązanych ze sobą wydarzeniach i miejscach. Tak jak kolejne kilkusekundowe narracje na Tik Toku, tak kolejne akapity tekstu przyciągają uwagę, aby po chwili zmienić nurt i kierunek. Tekst stara się płynąć strumieniem informacji nie dając czasu na refleksję. Czy nowe modele myślenia karmione przez sztuczną inteligencję prowadzą nas z powrotem do paleolitycznych jaskiń? Świat oparty na mediach algorytmicznych przypomina zamek krzyżujących się losów: miejsce, w którym współcześni analfabeci spotykają się, aby oglądać w ciszy kolejne karty tiktokowych narracji.
The year 1973 becomes a symbolic departure point for a journey undertaken together with a group of Italian intellectuals to seemingly unconnected events and locations. Just like successive several seconds long TikTok narrations, consecutive paragraphs of this text draw attention to the need to change both current and direction. The presented text attempts to flow in the manner of a stream of information without allowing time for reflection. Do new models of thinking, nourished by artificial intelligence, take us back into Stone Age caves? A world based on algorithmic media resembles a castle of crisscrossing fates, in which contemporary illiterates meet to examine in silence successive pages of TikTok narratives.
Źródło:
Konteksty. Polska Sztuka Ludowa; 2023, 342, 3; 144-146
1230-6142
2956-9214
Pojawia się w:
Konteksty. Polska Sztuka Ludowa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of laminar flow passing through a T-splitter plate and bridge pier.
Autorzy:
Qasim, Rafi Mohammed
Jabbar, Tahseen Ali
Faisal, Safaa Hameed
Powiązania:
https://bibliotekanauki.pl/articles/36063658.pdf
Data publikacji:
2023
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
hydrodynamic
laminar flow
open channel
pier
splitter plate
Opis:
The present analysis focuses on the investigation of the two-dimensional flow passing a bridge pier nearby a splitter plate in different regimes of a laminar flow. The splitter plate is T-shaped and two different cases have been studied based on the form of the splitter plate relative to the bridge pier. The analysis is implemented for steady and incompressible water flow in an open channel. The current study deals with velocity vectors, drag coefficients, lift coefficients, and skin friction. The analysis of the velocity vector gave a good indicator about the separation process and dissipation, which occurs at the splitter plate before the occurrence of these processes at the front face of the pier, especially the flow separation process. Moreover, the velocity vector gave a good image about the flow direction at two regions, the first region is located between the rear portion of the splitter plate and the frontal face of the pier, while the second region is the wake region, which is located at the downstream of the pier. Negative drag coefficient, lift coefficient, and skin friction coefficient values are obtained from the analysis. This happens due to the existence of the splitter plate that leads to the reduction of these values.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2023, 32, 2; 135-154
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
“denk an Pasolinis »verzweifelte Leere von Casarsa«” Considerations on the Influence of Spanish Mysticism and of Pasolini’s »Friulian« Poems on Peter Handke’s Noch einmal für Thukydides and Versuch über die Jukebox
Autorzy:
Pulimanti, Alessandro
Powiązania:
https://bibliotekanauki.pl/articles/2231692.pdf
Data publikacji:
2022-10-06
Wydawca:
Komisja Nauk Filologicznych Polskiej Akademii Nauk, Oddział we Wrocławiu
Tematy:
Peter Handke
essay on the Jukebox
Once Again for Thucydides
Pier Paolo Pasolini
poems in Casarsa
comparative method
ethno-anthropological perspective
Opis:
The aim of this paper is to reflect on Handke’s reception of Spanish and Friulian traditions. The first part of this paper will mention Miguel de Cervantes’, Teresa of Ávila’s and John of the Cross’ influence on Handke’s works, while also focusing on Handke’s fascination with the Spanish tradition and Pasolini’s works through the use of the comparative method. Pasolini’s vision of modern cultural customs is also taken into consideration in Handke’s Essay on the Jukebox, where clear references to Spanish authors also appear. The same occurs in Handke’s Glowworm Epopee, where Pasolini’s critical view of the “vanishing of the fireflies” indirectly shines throughout a tribute to the Poems in Casarsa. In the second section, an anthropological perspective will be employed, seeing as Handke’s ‘mysticism’ can be said to have drawn inspiration from the Romantic motif of “Mother Holle” (Höller 2013). In this regard, Ginzburg’s (1989) and Nardon’s (1999) studies will be used to assume Handke’s attachment to Friulian folk topics dating back to the 17th century. As opposed to Handke’s reception of Pasolini’s critical views and of Spanish mysticism, the influence of Friulian ethno-anthropological aspects on the Carinthian author’s works still needs to be demonstrated and its study improved.
Źródło:
Academic Journal of Modern Philology; 2022, 15; 267-277
2299-7164
2353-3218
Pojawia się w:
Academic Journal of Modern Philology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis on the process of ship striking the anti-collision pier
Autorzy:
Zhao, C.
Yan, H.
Powiązania:
https://bibliotekanauki.pl/articles/2211921.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
navigational infractructure
anti-collision
anti-collision pier
inland waters
analysis of ship collision
collision avoidance
collision force
China's shipping industry
Opis:
China's extensive inland navigable water system determines that inland navigation must be an important part of China's shipping industry. The collision process of ship striking the anti-collision pier is analyzed through simulation experiment in this paper. The results show that the collision process usually lasts less than 2 seconds, and the peak value of the collision force, friction and resultant force appears 0.5 after the start of the collision.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 3; 501--504
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-overturning safety performance investigation for single column pier bridge
Autorzy:
Ji, Yongcheng
Liu, Wenchao
Li, Wei
Wang, Pixiang
Powiązania:
https://bibliotekanauki.pl/articles/2174020.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
podpora jednokolumnowa
most dźwigarowy
stateczność przeciwwywrotna
modelowanie metodą elementów skończonych
przewrócenie
obciążenie krytyczne
obrót
single column pier
girder bridge
anti overturning stability
finite element modelling
overturn
ultimate load
rotation
Opis:
Under eccentric load, a single column pier bridge often overturns. In order to study the anti overturning performance of a single column pier bridge, taking the accident bridge in Wuxi as an example, a finite element model is established based on ABAQUS. According to the model simulation results, the relationship between the ultimate rotational load and overturning load of the accident bridge is obtained, and the ratio of the latter to the former is 1.75. Based on the model, the stress state, displacement state, and support state of the accident bridge under dead load, highway class I vehicle load, and accident vehicle load are obtained. Whether the strength and stability of the accident bridge under each load meet the service requirements is analyzed. In order to explore the differences among China, United States, and Japan specifications, the lateral stability of accident bridges is checked. It is found that the safety of the United States and Japan specifications is conservative, but the utilization rate of bridge traffic capacity is low. The safety of China specifications is slightly lower, but it can maximize the bridge’s traffic capacity and judge the ultimate overturning state of the bridge more accurately. The research results can provide technical references for the design and application of a single-column pier bridge.
Źródło:
Archives of Civil Engineering; 2022, 68, 3; 221--240
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Collapse modes of concrete reinforced square bridge piers under vehicle collision
Autorzy:
Zhou, Xiuneng
Xie, Zhongyou
Zhao, Zhixian
Li, Cheng
Powiązania:
https://bibliotekanauki.pl/articles/2086980.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
RC square pier
collapse mode
vehicle collision
numerical simulation
Opis:
In the field of engineering protection, there is a structural disaster named heavy vehicles impacting column structures. When a heavy truck collides with a reinforced concrete (RC) column at a high velocity, a large impact force generated makes perhaps the column fail and even collapse. Therefore, it is necessary to study the dynamic characteristics during such a disaster, which can provide some reference for structural design, optimization and protection. The RC column impacted by a vehicle could be simplified as a beam fixed at the bottom loaded by a concentrated force, whose deformation is controlled by shearing and bending. In the present work, the ultimate static forces corresponding to shearing and bending collapse are proposed based on theoretical analyses. The model validation is performed using the finite element approach and the theoretical analytical results are in good agreement with the finite element simulation results, which validates the present analytical model. Three cases are simulated by utilizing finite element code ABAQUS, which reveals that the approximate plateau collapse force keeps a long stage beyond the peak failure one. In addition, three collapse modes are observed based on the static force and deformation analysis, validating the present framework which can be used for routine pier design. The work can be extended to estimate collapse modes of building columns under a vehicle collision.
Źródło:
Journal of Theoretical and Applied Mechanics; 2022, 60, 3; 375--384
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of T-Splitter on the Laminar Flow Field around Cylinder Pier
Autorzy:
Qasim, Rafi Mohammed
Faisal, Safaa Hameed
Jabbar, Tahseen Ali
Powiązania:
https://bibliotekanauki.pl/articles/2204700.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
bridge pier
hydraulic field
laminar flow
T-splitter
Opis:
The hydrodynamic pattern, which surrounds the pier near a splitter that has T-shape, is investigated by adopting a numerical method and using ANSYS Fluent Software to achieve computation. The essential objective of this paper refers to revealing the behavior of the hydrodynamic field around the pier due to the existence of the upstream splitter plate. The T-splitter plate has not been used in previous works for controlling the flow field around the cylinder body. The main assumptions adopted in solving the hydrodynamic problem are incompressible, steady, and laminar flow. Reynolds number values are taken from 40 to 200 to guarantee laminar flow with laminar vortex street. The numerical investigation focuses on two main variables. These variables are the horizontal distance between the rear portion of a splitter and the pier center and bubble length. The numerical study comprises pressure contours, water velocity contours, and streamlines. Results reveal that bubbles are generated and developed due to the existence of the splitter. Four bubbles are generated, two of them are formed in the region between the splitter rear portion and pier leading portion and the other two bubbles are formed at the cylindrical pier wake region. The size and length of these four bubbles are dominated by the Reynolds number, these bubbles are non-symmetrical. It is revealed from the solution that with the rise in Reynolds number values then the disturbance will be increased simultaneously. The horizontal distance dominates the hydraulic response, which is described by the streamlines, pressure contours, and water flow contours. Furthermore, the Reynolds number has a significant influence on the pressure contours, water flow contours, and streamlines. Finally, a correlation equation is derived relying on bubble length, horizontal distance, and Reynolds number.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 5; 202--215
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The study of the local scour behaviour due to interference between abutment and two shapes of a bridge pier
Autorzy:
Muhsen, Noor A.A.
Khassaf, Saleh I.
Powiązania:
https://bibliotekanauki.pl/articles/2174307.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
local scour
pier shape
scour interference
spacing effect
vertical wall abutment
Opis:
Although the complexities and irrevocable consequences associated with bridge scour have attracted researchers interest, their studies scarcely indicated the effect of a bridge pier proximity to an abutment. This research aims to measure maximum scour depth and exhibit the impact of pier-abutment scour interference based on laboratory experiments where vertical-wall abutment and two shapes of a pier (oblong and lenticular) were used at three different spacings (23.5, 16.0, 9.0 cm). The results showed an obvious increase in the scour depth ratio when increasing flow intensity, Froude number, and a decreasing flow depth. They also showed that reduced pier-abutment spacing was accompanied by increase in pier scour for both shapes while decrease in abutment scour. The maximum scour depth that caused by an oblong shape was more than a lenticular shape by about 10.8%. Furthermore, new empirical equations were derived using IBM SPSS Statistics 21 with determination coefficients of 0.969, 0.974, and 0.978 for oblong, lenticular and abutment, respectively. They showed the correlation between predicted and observed data.
Źródło:
Journal of Water and Land Development; 2022, 55; 240--250
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
"Ragazzi di vita" di Pier Paolo Pasolini nelle traduzioni inglesi e francesi – rivisitazioni moderne
English and French translations of Pier Paolo Pasolini’s "Ragazzi di vita" – modern reinterpretations
Autorzy:
Kowalski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2130279.pdf
Data publikacji:
2021-12-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
literary translation
Romanesco dialect
'Ragazzi di vita'
Pier Paolo Pasolini
traduzione letteraria
dialetto romano
Opis:
L’articolo contiene un’analisi comparativa tra originali traduzioni in francese e in inglese di Ragazzi di vita di Pier Paolo Pasolini pubblicate rispettivamente nel 1958 e 1968 e le nuove versioni pubblicate nel 2016. L’analisi e basata su diversi aspetti come le scelte tra l’esotizzazione e l’addomesticamento; il modo in cui i traduttori hanno affrontato il problema del plurilinguismo nel testo di partenza che collega l’italiano standard, il dialetto romano e il gergo della malavita romana; strategie che riguardano per esempio gli antroponimi caricati semanticamente.
This article contains a comparative analysis between original French and English translations of Pasolini’s Ragazzi di vita first published respectively in 1958 and 1968 and new versions both published in 2016. The analysis is based on several factors, such as choices between foreignization and domestication; the way in which translators dealt with multilingualism of the source text, which combines Italian, the Romanesco dialect and the Rome’s lowlife jargon; strategies regarding semantically loaded anthroponyms.
Źródło:
Translatorica & Translata; 2021, 2; 29-42
2657-5817
Pojawia się w:
Translatorica & Translata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Artificial Neural Network for Estimation of Local Scour Depth Around Bridge Piers
Autorzy:
Shakir Ali Ali, Ahmed
Günal, Mustafa
Powiązania:
https://bibliotekanauki.pl/articles/2097766.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
artificial neural network
bridge pier
hydraulics
local scour
Opis:
Local scour around bridge piers impairs the stability of bridges’ structures. Therefore, a delicate estimation of the local scour depth is vital in designing the bridge piers foundations. In this research, MATLAB software was used to train artificial neural network (ANN) models with four hundred laboratory datasets from different laboratory studies, including five parameters: pier diameter, flow depth flow velocity, critical sediment velocity, sediment particle size, and equilibrium local scour depth. The outcomes present that the ANN model with the Levenberg-Marquardt algorithm and 11 nodes in the single hidden layer gives an accurate estimation better than other ANN models trained with different training algorithms based on the regression results and mean squared error values. Besides, the ANN model accurately provides predicted local scour depth and is better than linear and nonlinear regression models. Furthermore, sensitivity analysis shows that removing pier diameter from training parameters diminishes the reliability of prediction.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2021, 68, 2; 87--101
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engineering forecasting of the local scour around the circular bridge pier on the basis of experiments
Inżynierskie prognozowanie rozmyć miejscowych wokół walcowego filara mostowego na podstawie doświadczeń
Autorzy:
Bajkowski, Sławomir
Kiraga, Marta
Urbański, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/1852299.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
filar
most
rozmycie
prognoza
badania modelowe
bridge
pier
scour
forecast
model calculations
Opis:
The aim of the study was to indicate the procedure of using laboratory physical model tests of scour around bridge piers for the purposes of determining the potential scour of a riverbed on field bridge crossings. The determination of the uniform modeling scale coefficient according to the criterion of reliable sediment diameter limits the application of the results of tests on physical models to selected types of sediment. The projected depths of scouring of the riverbed at the pier in nature were determined for an object reproduced in the scale of 1:15 determined from the relationship of flow resistance, expressed by hydraulic losses described by the Chézy velocity coefficient, the value of which, in the model and in nature, should be the same. Expressing the value of the Chézy velocity coefficient with the Manning roughness coefficient and introducing the Strickler parameter, it was shown that the coarse sand used in the laboratory bed models the flow resistance corresponding to the resistance generated by gravel in nature. The verification of the calculated size of scouring was based on popular formulas from Russian literature by Begam and Volčenkov [16], Laursen and Toch’s [20] from the English, and use in Poland according to the Regulation ... (Journal of Laws of 2000, No. 63, item 735) [32].
Celem pracy było wskazanie procedury wykorzystania laboratoryjnych fizycznych badań modelowych rozmyć wokół filarów mostowych dla potrzeb określenia potencjalnego rozmycia koryta rzecznego na terenowych przeprawach mostowych. Wykorzystanie wyników badań laboratoryjnych w prognozowaniu rozmyć wokół filarów nowo projektowanych mostów wymaga uwzględnienia wpływu skali modelu. W warunkach analizowanego zadania skalę modelu ustalono z relacji parametrów granulometrycznych rumowiska wykorzystanego w badaniach modelowych i rumowiska rzecznego w cieku, dla którego prowadzono prognozę rozmyć. Określenie współczynnika nieskażonej skali modelowania według kryterium miarodajnej średnicy rumowiska ogranicza zastosowanie wyników badań na modelach fizycznych do wybranych rodzajów rumowiska rzecznego. Prognozowane głębokości rozmycia dna przy filarze w naturze zostały określone dla obiektu modelowanego w skali 1:15 ustalonej z relacji oporów przepływu, wyrażonych stratami hydraulicznymi opisanymi współczynnikiem prędkości Chezy, którego wartość na modelu i w naturze powinna być taka sama. Wyrażając wartość współczynnika prędkości Chezy, współczynnikiem szorstkości Manninga i wprowadzając parametr Stricklera, wykazano, że piasek gruby zastosowany w korycie laboratoryjnym modeluje opory przepływu odpowiadające oporom jakie generuje żwir w naturze. Do weryfikacji obliczonych wielkości rozmyć wykorzystano popularne wśród projektantów formuły z literatury rosyjskiej Begama i Volčenkova [35], angielskiej Laursena i Tocha [36] oraz zalecane do stosowania w Polsce według Rozporządzenia… [5]. W rezultacie otrzymano wzory opisujące wielkości rozmyć dla badanego obiektu ze wskazaniem zakresów ich stosowania.
Źródło:
Archives of Civil Engineering; 2021, 67, 3; 469-488
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of scour depth around bridge piers in tandem arrangement using M5 and ANN regression models
Autorzy:
Rahul, M.
Baldev, S.
Powiązania:
https://bibliotekanauki.pl/articles/1818520.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
tandem arrangement
scour depth
sediment
pier
ANN
M5 model
układ tandemowy
głębokość wymycia
osad
pomost
model M5
Opis:
Purpose: Due to an increase in a number of bridges being constructed, scour depth around bridge piers is gradually being recognized as one of the possible reasons for bridge failure. According to [1] about 53% of bridge failures in the US were caused due to floods and corresponding scour in the rivers. Lots of work has been carried out around the single pier but in the case of group piers, the work is very less. Hence, it becomes necessary to calculate the actual scour depth around the bridge piers considering the close location of bridges as well. Design/methodology/approach: Recognizing the need for research in this direction, an experimental study was planned and conducted in the Hydraulics Laboratory of Civil Engineering Department of National Institute of Technology Kurukshetra, India. Experiments were conducted in a standard recirculating tilting bed water flume 15 m long, 0.4 m wide, and 0.60 m deep. The orientation of more than one pier, namely Tandem pattern was employed for the work. Two pier models, 62 mm and 42 mm diameter were used for the experimental study. The mobile bed used in the experiments had an average mean size, d50 = 0.23 mm, 0.30 mm and 0.50 mm. Findings: The outcomes of the ANN function and M5 model analysis have been used to compare with experimental results. From the earlier studies, it was concluded that, when the clear spacing between the pier models was greater than 0D the scour depth around the piers increase with a rapid rate. However, in the case of modelling techniques, M5 models show higher predictive accuracy than ANN models. Research limitations/implications: It is a significant area of research. However, the present study has been a time and facility- constrained study. Therefore, there is a large scope to conduct further studies on the subject, Different pattern i.e. Side by Side; Staggered and Group of piers can be adopted for further investigations. Originality/value: Sufficient work has been done by number of researchers around the single bridge pier. But due to rapid urbanization a number of bridges constructed in close proximity to each other which affects the scour depth of each other. Modelling techniques used in hydraulic engineering are not always effective in practice. The present study discusses the effect of spacing on scouring around piers in a tandem arrangement using experimental as well as modelling techniques. To predict the scour depth of the Tandem arrangement 89 laboratory data sets have been used.
Źródło:
Archives of Materials Science and Engineering; 2020, 102, 2; 49--58
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Przepisywanie” dramatu jako przykład transferu literackich mitów
„Rewriting” Drama as a Transfer of the Literary Myths
Autorzy:
Figzał-Janikowska, Magdalena Maria
Powiązania:
https://bibliotekanauki.pl/articles/467727.pdf
Data publikacji:
2019
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
przepisywanie, transfer, mit literacki, dramat XX wieku, Heiner Müller, Pier Paolo Pasolini
rewriting, transfer, literary myth, 20th century drama, Heiner Müller, Pier Paolo Pasolini
Opis:
The article is focused on “rewriting” classic dramas as a tendency which is representative for dramaturgy of the second half of the 20th century. This phenomenon is strictly related to the paradigm shift in literature and theatre. “Rewriting” is based on re-interpretation and re-contextualisation of the well-known literary myths, and as a method of writing it helps to discover the new meanings of classic literature. “Rewriting” can also be considered as a transfer of the original classic text to a new cultural, social, and historical reality. The article is an attempt to characterise this kind of dramaturgy using selected plays of Heiner Müller and Pier Paolo Pasolini.
Artykuł traktuje o zjawisku „przepisywania” klasycznych tekstów jako tendencji charakterystycznej dla dramaturgii drugiej połowy XX wieku, ściśle związanej z przemianami na gruncie literatury oraz zmianą paradygmatu w zakresie sztuk widowiskowych. Jako praktyka dramatopisarska „przepisywanie” polega na reinterpretacji i rekontekstualizacji utrwalonych kulturowo mitów literackich, dzięki czemu mogą one odsłonić całkiem nowe znaczenia. Dochodzi tu zatem do swoistego transferu pierwotnego tekstu do nowej rzeczywistości społecznej, historycznej i kulturowej, którego celem staje się poszukiwanie punktów stycznych między tradycją a współczesnością. Powyższe zjawisko zobrazowane zostaje na przykładzie tekstów dwóch współczesnych dramatopisarzy: Heinera Müllera i Piera Paolo Pasoliniego.  
Źródło:
ER(R)GO: Teoria – Literatura – Kultura; 2019, 39; 25-38
1508-6305
2544-3186
Pojawia się w:
ER(R)GO: Teoria – Literatura – Kultura
Dostawca treści:
Biblioteka Nauki
Artykuł
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