Dissertations / Theses on the topic 'GROUP OF PIERS'
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Ozkeskin, Asli. "Settlement Reduction And Stress Concentration Factors In Rammed Aggregate Piers Determined From Full- Scale Group Load Tests." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12605153/index.pdf.
Full textLemme, Nathan A. "Effectiveness of Compacted Fill and Rammed Aggregate Piers for Increasing Lateral Resistance of Pile Foundations." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2393.
Full textMetsänen, Toni Tapio [Verfasser], Martin [Akademischer Betreuer] Oestreich, Martin [Gutachter] Oestreich, and Warren E. [Gutachter] Piers. "Metal-catalyzed generation of main-group electrophiles : mechanisms and applications / Toni Tapio Metsänen ; Gutachter: Martin Oestreich, Warren E. Piers ; Betreuer: Martin Oestreich." Berlin : Technische Universität Berlin, 2016. http://d-nb.info/1156012031/34.
Full textAndersen, Paul Joseph Walsh. "Performance of a full-scale Rammed Aggregate Pier group in silty sand based on blast-induced liquefaction testing in Emilia-Romagna, Italy." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8530.
Full textSzydlik, Linda (Linda L. ). "The Effects of Career Group Counseling on the Self-Concept of At-Risk High School Students as Measured by the Piers-Harris Children's Self-Concept Scale." Thesis, University of North Texas, 1995. https://digital.library.unt.edu/ark:/67531/metadc277630/.
Full textKuruoglu, Ozgur. "A New Approach To Estimate Settlements Under Footings On Rammed Aggregate Pier Groups." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609733/index.pdf.
Full textKfoury, Dimitry. "Calcul de Schubert affine et formules de Pieri." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0215.
Full textPieri's formulas are a gateway to understanding the algebra structure of the (affine) Grassmannian or even that of Flag varieties. Several are already established in a few particular types and cases. However, this problem remains open for most affine cases, especially to find Pieri formulas in "H (\mathcal{G}r_G)" in types "B", "C" and "D".In this thesis, even if some results are generalized for non-twisted affine Weyl groups, we mainly explore types A and C. In the flag variete of affine type A, we find a formula for multiplying, in the cohomology algebra of a flag variety, one element of the base "\xi^w" by another (special) element that will be called ''crochet''. This result is shown using the Pieri formula given by Lam et al in \cite{insertion}. In the affine Type "C", we propose a conjecture for a Pieri formula in Cohomology, showing that it is valid in degree "1" and "almost" all cases of degree "2". It is also checked, by testing many examples using the computer.In Homology, the Pieri formula in type C \cite{lam2010schubert}, is re-demonstrated, using a new simplified strategy. This new approach could eventually be used to establish formulas of exceptional types.In the finite dimensional flag varieties, we find an upper bound for the littlewood-Richardson's coefficients and generalize it, in all types, to particular classes that will be called ''small Schubert classes''
Ozalp, Murat Can. "Experimental Investigation Of Local Scour Around Bridge Pier Groups." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615594/index.pdf.
Full textLeclerc, Marc-Antoine. "Homogeneous Projective Varieties of Rank 2 Groups." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23558.
Full textNazariha, Mehrdad. "Design relationships for maximum local scour depth for bridge pier groups." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/9989.
Full textDuveau, Jérémy. "Les empreintes de pieds du Rozel (Manche) : Instantanés de groupes humains au Pléistocène supérieur. Approche combinée morphométrique et expérimentale." Thesis, Paris, Muséum national d'histoire naturelle, 2020. http://www.theses.fr/2020MNHN0004.
Full textThe hominin footprints represent unique remains that open a window on brief moments in the lives of extinct groups. Their study provides direct information on the size and composition of these groups which are essential to their adaptive success but rarely accessible from the fossil record. The study of these footprints is complex because several factors (body and biomechanical characteristics, nature of the substrate, taphonomy) impact their morphology and because they are relatively rare within the fossil record. Since 2012, several hundred potential footprints attributable to Neandertals have been discovered associated with a rich archaeological material in 5 levels from the Le Rozel paleodune (Manche, France) that are dated of 80,000 years. The discovery of these footprints offers the opportunity to focus on the size and composition of Neandertal social groups, which is the central issue of this doctorate. First, the analysis of the potential footprints discovered between 2012 and 2017 allowed identifying 257 footprints and 8 handprints; this sample represents the largest ichnological assemblage associated with Neandertals to date. Then, thanks to the development of an approach combining morphometry and experimentation, the size and composition of the groups were estimated from 3D digitized prints. As a result, the studied footprints reflect different age groups ranging from very young children (from 1 year old) to adults. The footprints from the ichnologically densest level represent a small group, probably composed of 10 to 13 individuals with 90% of young individuals. The Le Rozel's footprints thus provide unique information on the size and the composition of Neandertal groups to better understand Paleolithic occupations in Le Rozel 80 000 years ago
Bonfiglioli, Marco. "Riprogettare l'offerta di Retail Marketing: il caso I.C.A.S." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Find full textGarnier, Edwige. "Territoire et migration : le rôle de la territorialisation dans la construction identitaire et culturelle d'un groupe social se vivant en exil : les Pieds-Noirs aujourd'hui." Université Joseph Fourier (Grenoble), 2005. http://www.theses.fr/2005GRE10194.
Full textThis doctoral research is devoted to the french population of european and christian origin, established in Algeria, then re-patriated, called here the pied-noir population. This social group asserts a particular culture and identity. It also presents itself as uprooted. The departure from north Africa is still experienced as an exile by many members of this population, despite the fact that it truly was a repatriation within the nation-state. Re-patriation is thus integrated, generally, in the identity construction of this group. It seems that identity and cultural particularisms of the pied-noir population were preserved, although modified, following its migration. What happened to its rela tionship to space ? What are its current bonds with its lost territory? ln parallel, did this group take possession of certain spaces and places in france or abroad ? These questions concern at the same time the culture and the identity of the group but also its territorialisation and its territoriality at the present time. It is a matter, firstly, of taking stock of the extent to which culture, identity and territory interact with each other, and of the impact of a migration, and of mobility (more generally), upon these interactions. A reterritorialisation seems to be a necessity for the safeguard of the social group and also for a transmission of culture and identity to the generations who knew little or not at all of colonial Algeria. The form taken by territorial recombining raises questions. The concept of a territory as a limited area appears to be exceeded
DEVI, GEETA. "SCOURING AROUND A GROUP OF PIERS." Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19770.
Full textZhang, Rong-Tai, and 張榮泰. "Shaking Table Study on Bridge Piers with a Scoured Pile-Group Foundation." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/898z4s.
Full text國立臺灣科技大學
營建工程系
106
In this study, the impact of scouring on the seismic performance of bridge pier with pile-group foundation was investigated under multi-hazard circumstances. The model bridge pier with pile-group foundation comprised a lumped mass, a steel pier, and a footing supported by a aluminum group pile within dry soil. The shaking table test was carried out to study the dynamic response of the bridge pier with pile- group foundation model at different bare depths. Conducting dynamic system identification to the bridge pier with pile- group foundation model to realize dynamic characteristics. The test results show that the soil contribute most of the damping ratio. As the exposure depth deepens, the basic vibration period of the specimen is prolonged, but the system damping ratio didn’t change significantly. During the time history, the basic vibration period and damping ratio of the model would increase in the ground motion with high acceleration. When the ground motion is moderated, the basic vibration period and damping ratio of the model will decrease. As the exposure depth deepens, the maximum bending moment of the pile increases and the position distribution of the bending moment changes. The maximum bending moment of the bridge piers may decrease after exposure to a certain depth. Soil-structure interaction behavior is simulated by nonlinear soil spring (p-y curves) and establishes three different numerical models for simulation. The first way is the simulation of soil-structure interaction behavior using relevant domestic research formula, which is modeled by SAP2000. The second way is the simulation of soil-structure interaction behavior using API formula, which is modeled by SAP2000. The third way is the simulation of soil-structure interaction behavior using soil spring with elastic, plasticity and gapping behavior, which is modeled by OpenSees. The results show that simulation of soil-structure interaction behavior using API formula modeled by SAP2000 and simulation of soil-structure interaction behavior using soil spring with elastic, plasticity and gapping behavior modeled by OpenSees can effectively predict the behavior of the test model.
Lança, Rui Miguel Madeira. "Clear-water scour at single piers and pile groups." Doctoral thesis, 2013. http://hdl.handle.net/10400.6/3603.
Full textPieris, Martin. "The ˙43 Group and its Legacy in Sri Lanka." Thesis, 2022. http://hdl.handle.net/1959.13/1446929.
Full textThis research project examines the birth of ‘Ceylonese modernism’1 through the formation of the ˙43 Group in Sri Lanka in the period just before independence in 1943. Their contribution to art practice in the country’s post-independence and independent eras is explored and, parallel to this, the Group’s influence on the development of my own practice as a contemporary artist is posited.
yu, kuo wen, and 郭文郁. "Analysis of the response of group pile foundation pier under earthquake." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/89903824725759781924.
Full text國立中央大學
土木工程研究所
86
There are many earthquake occurring in Taiwan.The effect of soil layer acting on structure should be considered in the dynamic response of bridge under earthquake.By the great advances of capacity of microcomputer,the analysis of soil-structure interaction(SSI) is accessible.When foundation was established on weak soil layer,the pile is required to transmit the loading to the rock base and the battered piles are used if larger lateral force was applied. Therefore,the response of battered pile of pier suffering earthquake is necessary to be studied. This paper adopts the three dimensional finite element to evaluate the response of group pile foundation of bridge pier consider SSI under earthquake by direct method in time domain.This paper used eight node linear element to simulate soil and beam element to simulate pile and pier.The Mohr-Coulomb failure criteria of elastoplastic material is applied to describe the stress strain behavior of soil. Three cases are discussed in this paper.First,evaluate the response of bridge pier with different spacing which varying from one to six time of pile spacing.Second,discuss the differences of dynamic responses of bridge pier with same length of piles planted in different depths of soil layers.Third,compare the dynamic responses of bridge pier with different angles of battered piles. From the results of analysis,corresponding to the increasing of pile spacing the maximum top and bottom displacements of pier and maximum acceleration decrease.The maximum bending moment and shear force in the bottom behave in the same manner.The maximum bending moment,maximum shear force,maximum acceleration,maximum displacement in the bottom of the pier decrease with the increasing angle of battered piles.In the contrast,the maximum displacement,maximum acceleration in the top of bridge pier decrease with the increasing angle of battered piles.
lu, Chi-lun, and 呂其倫. "Application of Ring Column Groups to Pier Scour Prevention." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/00031120032574790661.
Full text逢甲大學
水利工程與資源保育研究所
99
Heavy rainfall frequently occurs in the summer in Taiwan due to the effects of the stationary fronts and typhoons. In recent years, the climatic anomalies tend to induce more extreme weather. For example, record-breaking heavy rainfall induced by Typhoon Morakot (2009) caused an unprecedented disaster in Taiwan. High flow caused scouring of the river bed around the piers, resulting in the exposure of the pier foundation and threatening the safety of bridge. To protect the bridge foundation, the use of Ring column groups as a pier scour countermeasure is reported. In this study, hydraulic model experiments with Ring column groups are carried out to search for the ideal arrangements to reduce the bridge scour. It can be served as a reference of design for relevant engineers in future. A series of experiment was conducted with uniform sediment under the clear-water steady flow conditions. Various parameters including relative distance, angle between the Ring column groups, angle of attack with flow of the Ring column groups, and distance between the Ring column groups and bridge pier are considered. Laboratory data are used to assess the influence of each parameter on reducing the kinetic energy of the flow. When the Ring column groups are installed, the scour depth decreases obviously, and both the downflow and horseshoe vortex are guided effectively downstream far away from the bridge pier structure. The Ring column groups can extend the range of protection due to the Ring columns special irregular and porous surface, not only increase the protective efficiency on the pier foundation but also reduces scour depth itself. The result shows that scour depth reduction of the pier could reach 55.8% of the original value, which is the best set type among the experimental conditions conducted in this study, when the Ring column groups settings at a distance of 6 times the pier diameter, 50 degrees for the angle between the Ring column groups, spacing of 2 times the pier diameter, and zero degree for the angle of attack with flow.
Ju, Hong-Yi, and 朱宏翊. "The protective effect of Porous Structure groups for pier scour." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/14044072027015120780.
Full text國立成功大學
水利及海洋工程學系碩博士班
95
Because the establishment of the pier of the bridge makes the area of water cross-section reduce on the natural river, flow field change, and then change primitive sediment transport characteristic, therefore result in local scour phenomenon around the pier. When protective structure is set up upstream of pier will begin to effect pier scour. So this paper uses mainly the Porous Structure groups to reduce local scour around the pier. This paper research into the protective effect of Porous Structure groups for pier scour mainly, through experiment change Porous Structure groups set up distance, height, Porous Structure and Porous Structure set up interval, then change Porous Structure different arrangement the way and different Porous Structure set up the quantity in addition, perform for a series of discussions. (1) Scouring processes, (2) Bottom bed height around the pier, (3) Bottom bed height around the Porous Structure, (4) Pier the minimum and maximum scour depth position and (5) Protective effect. According to the results of experiment, the Porous Structure groups set up 5 times diameter of the pier from the pier and Porous Structure groups bottom is set up 0.15 times of depth of water from the sediment of the bottom bed above, Porous Structure groups can provide for protective effect of pier to attain to 85.88%, for Porous Structure set up the way best in the experimental condition range of this paper.
Jan, Yuan-Haur, and 詹元豪. "Local Scouring to Single Pile and Pile Groups of Bridge Pier." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/79241168101427856530.
Full textHsu, Shu-Nu, and 徐淑女. "Experimental Study On Triangle Arrangement Of Porous Cylinder Groups for Pier Scour Countermeasures." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/32862052957856010725.
Full textTeng, Chueh-Ming, and 鄧爵明. "A study of piled pier and scoured groups of piles under statically lateral cyclic loading." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ztbsws.
Full text國立臺灣大學
土木工程學研究所
105
This study investigated the structure behavior and soil-structure interaction of single-column pier and the group piles model through lateral cyclic loading test. A large biaxial laminar sand box was used to set the model specimen and sand. The upper part of the structure is a single-column pier consisting of a 120 mm×120 mm×20 mm joint face connected with actuator, a solid steel pier with a diameter of 40 mm, 200 mm high and a 150 mm×150 mm×15 mm base plate made by steel. The lower structure is a group pile foundation specimen, consisting of 200 mm×200 mm×15 mm aluminum bottom adapter plate, 150 mm×150 mm×15 mm aluminum base plate with d25 mm×8.25 mm ×800 mm 2 × 2 group pile composition. The experiment divide into pure structure model and model of scouring. The pure structural model is fixed to the shear box and experiment with no sand. The scouring model also fixed the specimen in the shear box and the model with specified exposed length of pile foundation, as a ratio of pile diameter D, from 0D, 3D to 6D to explore the foundation of different depth of exposure. The sand property of dry fine silica sand is controlled by relative density of 50%. In the course of experiment, the lateral displacement of the different sizes is ±1 mm、±5 mm、±10 mm、±15 mm、±20 mm、±30 mm、±40 mm and ±50 mm. In the ±1 mm ~ ±20 mm for three cycles and ±30 mm ~ ±50 mm for two cycles. Among the experiment, the displacement, angel and strain response are recorded. Furthermore, the strain gauge can calculate the value of bending moment and axial force. The results of the experiment. Displacement: With the depth of the soil exposed, the displacement of the base plate is more obvious. Angle: the angle variation of the actuator elevation is different from that of the base plate, indicating that the pier is not a rigid body. Under the same displacement, as the depth of scouring increases, the rotation angle decreases. Strain: It can be observed that the position of the strain is large at the top and bottom of the pile. In the large strain area, the strain gauge is easy to slip, loose and even damage in the experiment process, so that the strain value of the large position is more prone to abnormal. Axial force: As the souring increase, the axial force of the pile will decrease. Moment: Pure structure, the maximum bending moment is generated at the base of the foundation. The maximum moment of the scouring model appears at the top of the foundation. Hysteresis loop: As the exposed depth increase, the force will decrease.
Therrien, Andréanne. "Efficacité d'un plan d'activation des intentions sur l'examen quotidien des pieds de personnes atteintes de diabète de type 2 inscrites dans un programme d'enseignement de diabète en groupe." Thèse, 2017. http://depot-e.uqtr.ca/8084/1/031624529.pdf.
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