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Дисертації з теми "Ponts – Fondations et piles – Affouillement":
Zaidan, Jana. "Scοur investigatiοn arοund a bridge pier fοunded in cοhesive sοil". Electronic Thesis or Diss., Normandie, 2023. http://www.theses.fr/2023NORMLH22.
Local scour is considered to be one of the main causes of bridge failure and collapse. Laboratory experiments are a crucial and important approach for the scour process investigation. Yet, there is no robust and standard instrumentation for tracking the evolution of this physical phenomenon in laboratory studies. There are several flume-based studies of scour around a circular bridge pier on cohesionless soil. However, the bed of natural alluvial channels often contains cohesive sediments. Comparatively, there is a limited research on local scour around circular pier founded in cohesive beds that has been documented. In this PhD research, a 3D Laser Scanner is used to monitor scour around a circular pier. The results obtained with this technique, in line with previous research, in particular that carried out on a sandy bed, demonstrate its effectiveness. The technique offers advantages such as continuous spatiotemporal monitoring, but also many limitations. In a next step, the study focused on the effect of the type and proportion of fines in the sediment mixture on the depth and the shape of the scour hole and the temporal propagation of scour process around a circular pier. Results show that increasing the clay in the fine fraction reduce significantly the scour. The mixture with a range around 7.5-10 % of clay fines content provides the threshold composition for coherent soil behavior in scouring process. In addition, scour depth prediction for bridge piers in cohesive soil is not yet fully developed. In engineering practice, scour depth estimation methods currently used are those proposed for sand bed. Many researches aimed to adress a method to optimize the design of bridge piers in the case of cohesive soil. Among the different methods, the one based on the use of the EFA (Erosion Function Apparatus) erodimeter and called SRICOS (Scour Rate In COhesive Soil) was examined as part of this work in order to predict the deepest scour in cohesive bed
Fach, Mohanad Al. "Modélisation tridimensionnelle du comportement sismique du système sol-pieux-pont : prise en compte des non-linéarités du sol et du béton." Electronic Thesis or Diss., Lille 1, 2009. http://www.theses.fr/2009LIL10063.
This work includes an analysis of various interactions of soil-piles-structure under seismic loads.mainly concerns with the analysis of the interactions between different elements (soil, pile, foundation, structure). A special attention was devoted to the non-linearity of soil, the development of plastic hinges in the piles and the influence of the soil-pile interface on the seismic response of the soil-pile-structure. The study was conducted using a three-dimensional modeling using the program FLAC 3D. The thesis is presented in three chapters : The tirst chapter presents a literature review of research work related to seismic behaviour of pile foundations.The second chapter includes a three-dimensional analysis of seismic behavior of soil-pile-superstructure taking into account the effect of soil plasticity. The study was conducted on various aspects of the interaction soil-pile-structure. the influence of mechanical parameters of soil and pile. the geometric configuration of the piles groups and the influence of seismic loading and its frequency content.The third chapter deals with specific aspects of the problem. including the development of plastic hinges at the top of the pile. the modeling and the influence of pile-soil interface and behavior of reinforced structures
Fach, Mohanad Al. "Modélisation tridimensionnelle du comportement sismique du système sol-pieux-pont : prise en compte des non-linéarités du sol et du béton." Thesis, Lille 1, 2009. http://www.theses.fr/2009LIL10063/document.
This work includes an analysis of various interactions of soil-piles-structure under seismic loads.mainly concerns with the analysis of the interactions between different elements (soil, pile, foundation, structure). A special attention was devoted to the non-linearity of soil, the development of plastic hinges in the piles and the influence of the soil-pile interface on the seismic response of the soil-pile-structure. The study was conducted using a three-dimensional modeling using the program FLAC 3D. The thesis is presented in three chapters : The tirst chapter presents a literature review of research work related to seismic behaviour of pile foundations.The second chapter includes a three-dimensional analysis of seismic behavior of soil-pile-superstructure taking into account the effect of soil plasticity. The study was conducted on various aspects of the interaction soil-pile-structure. the influence of mechanical parameters of soil and pile. the geometric configuration of the piles groups and the influence of seismic loading and its frequency content.The third chapter deals with specific aspects of the problem. including the development of plastic hinges at the top of the pile. the modeling and the influence of pile-soil interface and behavior of reinforced structures
Alsaleh, Hassan. "Modélisation non-linéaire en trois dimensions de l'interaction sol-micropieux-pont sous chargements sismiques." Lille 1, 2007. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2007/50376-2007-Alsaleh.pdf.
Книги з теми "Ponts – Fondations et piles – Affouillement":
Sturm, Terry W. Evaluation of bridge-scour research: Abutment and contraction scour processes and prediction. Washington, D.C: National Cooperative Highway Research Program, Transportation Research Board of the National Academies, 2011.
Rollins, Kyle M. Design guidelines for increasing the lateral resistance of highway-bridge pile foundations by improving weak soils. Washington, D.C: Transportation Research Board, 2011.
G. J. C. M. Hoffmans and H. J. Verheij. Scour Manual: Current-Related Erosion. Taylor & Francis Group, 2021.
G. J. C. M. Hoffmans and H. J. Verheij. Scour Manual: Current-Related Erosion. Taylor & Francis Group, 2021.
G. J. C. M. Hoffmans. Scour Manual. CRC Press LLC, 2017.
G. J. C. M. Hoffmans and H. J. Verheij. Scour Manual: Current-Related Erosion. Taylor & Francis Group, 2021.
G. J. C. M. Hoffmans. Scour Manual. CRC Press LLC, 2017.
G. J. C. M. Hoffmans and H. J. Verheij. Scour Manual: Current-Related Erosion. Taylor & Francis Group, 2021.
G. J. C. M. Hoffmans. Scour Manual. CRC Press LLC, 2017.