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Dissertations / Theses on the topic 'FLOATING COLUMNS'

Author: Grafiati

Published: 11 September 2023

Last updated: 26 July 2025

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1

Sparrer, Wendelle Faith. "Implementation and Demonstration of a Time Domain Modeling Tool for Floating Oscillating Water Columns." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/101889.

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Renewable energy is a critical component in combating climate change. Ocean wave energy is a source of renewable energy that can be harvested using Wave Energy Converters (WECs). One such WEC is the floating Oscillating Water Column (OWC), which has been successfully field tested and warrants further exploration. This research implements a publicly accessible code in MatLab and SimuLink to simulate the dynamics of a floating OWC in the time domain. This code, known as the Floating OWC Iterative Time Series Solver (FlOWCITSS), uses the pressure distribution model paired with state space realiza

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2

Sunnetcioglu, Emrah Mehmet. "A Laboratory Model Study On Settlement Reduction Ofstone Columns In Soft Clay." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614558/index.pdf.

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ABSTRACT A LABORATORY MODEL STUDY ON SETTLEMENT REDUCTION Effect OF STONE COLUMNS IN SOFT CLAY S&uuml<br>nnetcioglu, Mehmet Emrah M.Sc., Department of Civil Engineering Supervisor: Prof. Dr. Mehmet Ufuk Ergun August 2012, 177 pages An experimental study was conducted in order to examine settlement reduction ratios of footing supported by both floating and end bearing type of stone columns. For the floating types, tests were done with varying column lengths of one and two widths of footing (L=B,2B). Tests were conducted in 200 mm* 200 mm* 200 mm cubic loading tanks. The reinforcement effect

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3

Patel, Dhara Yogendra. "Reflection." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/32832.

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â Reflectionâ is an experiment with what I call â symbolic architectureâ i.e. design where the features of the building have a profound meaning or a strong recall to some familiar aspect in our lives. It is a meditation center designed to rejuvenate visitors by providing an ideal environment to practice and teach meditation. The design is inspired by concepts of Hindu philosophy and each element of the building, the light, the materials, the water and the structure is likened to an element of the spiritual being that helps a meditator achieve a connection between the body and the

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4

Tvare, Oyvind. "Fatigue Analysis of Column-Pontoon Connection in a Semi-submersible Floating Wind Turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-27048.

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In a world with ever increasing energy demands, there is a need to find new ways to harvest renewable energy. Floating offshore wind turbines could be an important energy source in the future. To make this possible a better understanding of offshore wind turbines is essential. This thesis has dealt with fatigue associated challenges related to a column-pontoon connection in a semi-submersible floating wind turbine developed at CeSOS, NTNU.The specific design investigated in this report has a transition hull from the cylindrical column to the rectangular pontoon. A finite element model of the c

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5

Crema, Ilaria [Verfasser], and Hocine [Akademischer Betreuer] Oumeraci. "Oscillating water column wave energy converters integrated in very large floating structures / Ilaria Crema ; Betreuer: Hocine Oumeraci." Braunschweig : Technische Universität Braunschweig, 2018. http://d-nb.info/1175815357/34.

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6

Kuruoglu, 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.

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This study uses a 3D finite element program, calibrated with the results of a full scale instrumented load test on a limited size footing, to estimate the settlement improvement factor for footings resting on rammed aggregate pier groups. A simplified 3D finite element model (Composite Soil Model) was developed, which takes into account the increase of stiffness around the piers during the ramming process. Design charts for settlement improvement factors of square footings of different sizes (B = 2.4m to 4.8m) resting on aggregate pier groups of different area ratios (AR = 0.087 to 0.349), p

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7

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.

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Despite the developments in the last decades, field performance information for short aggregate pier improved ground is needed for future design and to develop a better understanding of the performance of the short (floating) aggregate piers. A full-scale field study was performed to investigate the floating aggregate pier behavior in a soft clayey soil. Site investigations included five boreholes and sampling, four CPT soundings, and SPT and laboratory testing. The soil profile consisted of 8m thick compressible clay overlying weathered rock. Four large plate load test stations were prepare

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8

Akbar, Demiral Salih. "The Non-uniform Argon Dc Glow Discharge System Parameters Measured With Fast Three Couples Of Double Probe." Phd thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607109/index.pdf.

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The non-uniform dc glow discharge plasma system is studied by using isolated computer controlled three couples of double probe system (TCDP) in argon gas, simultaneously. TCDP system has been developed to use for magnetized, unmagnetized, and for low oscillating plasma systems by using low pass filter with optically isolated circuitry to minimize the measurement errors with higher resolution and accuracy. Difference in the shapes and diameters of the discharge tube from region to region leads to change in the positive column glow discharge properties. This is because the positive column inhomo

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9

Coudurier, Christophe. "Conception, modélisation et contrôle d'un tube anti-roulis multidirectionnel pour une barge offshore portant une éolienne." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEM054/document.

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Suite à la mise en place de politiques publiques favorisant les énergies renouvelables, la construction de fermes éoliennes offshore est en plein essor aux quatre coins du monde. Or, la technique de l'éolienne offshore posée, la seule utilisée actuellement, n'est pas viable économiquement dans des eaux trop profondes. Ceci représente un sérieux frein au développement de l'énergie éolienne. Pour cette raison, la communauté scientifique s'intéresse depuis plusieurs années aux éoliennes sur plates-formes flottantes. En eau profonde, cette technologie est intéressante. Mais le fait que l'éolienne

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10

DWIVEDI, ARCHIT. "SEISMIC ANALYSIS OF MULTISTOREYED BUILDINGS WITH AND WITHOUT FLOATING COLUMNS." Thesis, 2018. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16253.

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In present scenario buildings with floating column is a typical feature in the modern multistory construction in urban India. Such features are highly undesirable in building built in seismically active areas. This study highlights the importance of explicitly recognizing the presence of the floating column in the analysis of building. Alternate measures, involving stiffness balance of the first storey and the storey above, are proposed to reduce the irregularity introduced by the floating columns. The study is carried out on a building with floating columns. The plan layout of the bui

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11

Chang, Yu-Hsin, and 張祐鑫. "Model Tests on Bearing Behavior of Horizontal Laminated Reinforced Sand Columns Floating in Soft Clay." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/63uu5r.

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碩士<br>淡江大學<br>土木工程學系碩士班<br>106<br>This study investigates the bearing behavior of individual geosynthetic-laminated sand columns embedded in very soft clay and medium hard clay through model tests. Similarity analysis was first executed to determine the suitable properties of the constituents used in the model test to ensure comparable behavior between the prototype-scale and model-scale geosynthetic-laminated sand columns. The model tests were divided into plane strain and axisymmetric,with rigid column and 5、10 or 20 layers in cross direction of geosynthetic sheets horizontally placed in the

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12

Behera, Sukumar. "Seismic analysis of multistorey building with floating column." Thesis, 2012. http://ethesis.nitrkl.ac.in/3951/1/Seismic_analysis_of_multistorey_building_with_floating_column.pdf.

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In present scenario buildings with floating column is a typical feature in the modern multistory construction in urban India. Such features are highly undesirable in building built in seismically active areas. This study highlights the importance of explicitly recognizing the presence of the floating column in the analysis of building. Alternate measures, involving stiffness balance of the first storey and the storey above, are proposed to reduce the irregularity introduced by the floating columns. FEM codes are developed for 2D multi storey frames with and without floating column to study

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13

Huang, Yi-Chun, and 黃逸群. "Analysis of Floating Structure with Tuned Liquid Column Damper." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/66502669479644433620.

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碩士<br>國立臺灣海洋大學<br>河海工程學系<br>97<br>Abstract A numerical model was developed by usage of Boundary Element Method in this study to analyze the characteristics of floating body’s motion which has the equipment of the tuned liquid column damper. Theoretic analysis is based on linear wave theory and assumes the body moving with a synchronous small amplitude of waves. The tuned liquid column damper is assumed to have a contant dimension and set up inner the floating structure. Coupling with three freedoms motion of floating body, the motion of liquid surface was gotten by means of momentum conservati

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14

Lo, Wen-Tse, and 羅文澤. "Experimental study of moored floating body with Tuned Liquid Column Damper." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/49190935648143905165.

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15

Crema, Ilaria. "OSCILLATING WATER COLUMN WAVE ENERGY CONVERTERS INTEGRATED IN VERY LARGE FLOATING STRUCTURES." Doctoral thesis, 2017. http://hdl.handle.net/2158/1152946.

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The increasing population density and the industrial expansion significantly affect the availability of land. In this context, the high modularity of Very Large Floating Structures (VLFSs) may indeed represent a promising alternative for multipurpose use. Furthermore, the interest for the sea as a source of renewable marine energy, particularly for wave energy, has tremendously increased in the last decade and years. Among the large diversity of Wave Energy Converters (WECs), the Oscillating Water Column (OWC) is one of the most promising concept. Moreover, when an OWC is incorporated in a VLF

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16

Kuo, Jen-Chieh, and 郭仁傑. "Analysis of a two-dimension moored floating body with tuned liquid column damper." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/04183661854030749653.

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17

Elhanafi, ASSM. "Performance and survivability of offshore oscillating water column wave energy converters." Thesis, 2017. https://eprints.utas.edu.au/23971/2/Elhanafi_whole_thesis_ex_pub_mat.pdf.

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This research was performed with a focus on two key aspects of energy cost–reduction for offshore OWC devices; improving the power extraction efficiency and reducing the excess margin in structural safety factors by a better understanding of wave–induced loads on these devices. This study utilised information from three different resources. First, 2D and 3D numerical results from fully nonlinear Computational Fluid Dynamics (CFD) simulations performed using the commercial code STAR–CCM+ that was validated in good agreement with physical scale model measurements at each stage of increasing comp

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