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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Effects of joint continuity on tapered member steel portal framed structures

Cunningham, Ronald January 1987 (has links)
No description available.
2

Media framing – As time goes? : A qualitative longitudinal study

Norin, Erik, Kahlström, Julia January 2012 (has links)
No description available.
3

Bytový dům, Uničov / Apartment building, Unicov

Navarová, Eva January 2013 (has links)
Object of presented dissertation is proposition of block of flats. Block of flats is based on wood technology with free stages without cellar. Block of flats is designed with 22°saddle roof based on rafters with tie beam. Object is situated in Uničov, Czech Republic.
4

Material choices for the building frame : Effects on the accomplishment of the Sustainable Development Goals’ targets

Nyberg, Fanny January 2020 (has links)
Potential synergy effects and conflicts, so-called interactions, between a climate action that aims to mitigate the climate impact and five targets of the Sustainable Development Goals are identified in this study. The climate action is Conscious material choices for the frame, and the materials assessed are climate improved concrete and domestic wood. Standard concrete is used as the business as usual scenario. A pre-school building is used as an example building to demonstrate the difference in the climate impact of a frame made from the two materials assessed in the study. Life cycle assessments (LCA) of the frames shows that the domestic wood frame has a lower climate impact than the climate improved concrete frame.Two methods are used in this study. The first method is making an LCA for transportation of the materials assessed to see the environmental impact, and there is one scenario for each material where the transportation method is by a truck and one that is by train. The second method used for the study is a goal interaction scoring-method from “A draft framework for understanding SDG interactions” by Nilsson et al. (2016) that gives the interactions a score based on specific criteria. The scores are visualised in a colour coordinated matrix. The interactions generate synergies if the sums of the scores in the matrix are positive and will likely help accomplish the target. If the sums of the scores in the matrix are negative, it indicates that there are conflicts that could endanger the possibilities to reach the target.LCA of the transport scenarios shows that when the transportation distance is long, the climate impact is lowest when transporting as much as possible of the materials by train. Transporting the domestic wood for the frame by train (for longer distances) has a lower climate impact than transporting the climate improved concrete. For shorter distances, there is not a significant difference between transportation by truck or by train. The climate improved concrete gets score 0, meaning that there are neither positive nor negative interactions for the chosen material for the frame. The domestic wood gets the score +8, which indicates that there are synergies. Both the climate improved concrete and the domestic wood should not interfere with the accomplishment of the Sustainable Development Goal’s targets. However, the domestic wood for the frame generates more synergies and by choosing the domestic wooden frame for a building using a train as a transportation of the material when possible has the lowest environmental impact of the assessed materials for the frame. / <p>2020-06-08</p>
5

Bytový dům / Apartment House

Beran, Tomáš January 2019 (has links)
Object of presented dissertation is proposition of apartment building. Apartment building is based on wood technology with two stages without cellar and with flat roof. Block of flats is designed with 8 flats. Some of them with big terrace. Object is situated in Olomouc, Czech Republic.
6

Optimización heuristica de pórticos de edificación de hormigón armado

Payá Zaforteza, Ignacio Javier 27 February 2009 (has links)
El objetivo de esta Tesis es el diseño de algoritmos robustos y flexibles que permitan automatizar el diseño óptimo de los pórticos de hormigón armado habitualmente empleados en edificación y extraer conclusiones generales sobre las estructuras optimizadas. El trabajo define un esquema general para la optimización monoobjetivo (coste económico) y multiobjetivo de estas estructuras que es aplicado a pórticos planos con un máximo de 153 variables. Entre ellas figuran seis calidades diferentes de hormigón. Para minimizar el coste económico se prueban cinco métodos heurísticos: una Estrategia de Saltos Múltiples Aleatorios (RW), el Gradiente First Best (FB), la Cristalización Simulada (SA), la Aceptación por Umbrales (TA) y los Algoritmos Genéticos (GA). Estas técnicas se utilizan en una primera fase para optimizar un pórtico de dos vanos y cuatro plantas sometido a acciones verticales y horizontables. La versión desarrollada de SA proporciona el diseño de mayor calidad, cuyo coste es de 3473.06 . Los mejores proyectos obtenidos mediante las variantes creadas de TA, FB, GA y RW tienen costes mínimos superiores en un 0.52%, 5.74%, 8.69% y un 124.6% respectivamente. Por estos motivos se elige SA para, en una segunda fase, optimizar económicamente otros pórticos de dos vanos y dos, seis y ocho plantas. Los resultados obtenidos permiten proponer reglas para el predimensionamiento de las estructuras optimizadas y automatizar la elección de los parámetros del algoritmo SA, lo que evita largos procesos de ensayo y error. Se comprueba que los estados límites habitualmente empleados en el diseño de esta tipología estructural son también suficientes para comprobar la seguridad de las estructuras optimizadas. Asimismo se investiga la repercusión económica del empleo de un único tipo de hormigón (un HA-25 con resistencia de proyecto a compresión igual a 25 MPa) y de la utilización de vigas planas en lugar de descolgadas. En el caso del pórtico de ocho plantas, el uso exclusivo / Payá Zaforteza, IJ. (2007). Optimización heuristica de pórticos de edificación de hormigón armado [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/4161 / Palancia
7

Administrativní centrum / Office Centre

Robotka, David January 2018 (has links)
This diploma thesis deals with design of steel structure with composite steel-concrete floor structure of a office building.The building is located in Moravský Krumlov. The Office buidling consist of multi-storey building and an entrance atrium. The total ground plan's dimensions are 52,8m x 48,0m. The multi-storey building has 8 floor. The maximum heigh of the building is 25,32m above ground. The project is designed in two options. For winning variant is including check and it is performed a drawings with design and check assembly details and anchorage.
8

Obchodní a administrativní centrum / Business and office centre

Novotný, Petr January 2015 (has links)
The aim of this master´s thesis was design and analysis of a steel supporting structure of a building for business and administration purposes in Ostrava. It includes an assessment of the main load-bearing construction elements and the selected connections. The thesis also contains the design documentation of the building and compares two different variants of the steel construction design.
9

Rehabilitation of Exterior RC Beam-Column Joints using Web-Bonded FRP Sheets

Mahini, Seyed Saeid Unknown Date (has links)
In a Reinforced Concrete (RC) building subjected to lateral loads such as earthquake and wind pressure, the beam to column joints constitute one of the critical regions, especially the exterior ones, and they must be designed and detailed to dissipate large amounts of energy without a significant loss of, strength, stiffness and ductility. This would be achieved when the beam-column joints are designed in such a way that the plastic hinges form at a distance away from the column face and the joint region remain elastic. In existing frames, an easy and practical way to implement this behaviour following the accepted design philosophy of the strong-column weak-beam concept is the use a Fibre Reinforced Plastic (FRP) retrofitting system. In the case of damaged buildings, this can be achieved through a FRP repairing system. In the experimental part of this study, seven scaled down exterior subassemblies were tested under monotonic or cyclic loads. All specimens were designed following the strong-column weak-beam principal. The three categories selected for this investigation included the FRP-repaired and FRP-retrofitted specimens under monotonic loads and FRP-retrofitted specimen under cyclic loads. All repairing/retrofitting was performed using a new technique called a web-bonded FRP system, which was developed for the first time in the current study. On the basis of test results, it was concluded that the FRP repairing/retrofitting system can restore/upgrade the integrity of the joint, keeping/upgrading its strength, stiffness and ductility, and shifting the plastic hinges from the column face toward the beam in such a way that the joint remains elastic. In the analytical part of this study, a closed-form solution was developed in order to predict the physical behaviour of the repaired/retrofitted specimens. Firstly, an analytical model was developed to calculate the ultimate moment capacity of the web-bonded FRP sections considering two failure modes, FRP rupture and tension failure, followed by an extended formulation for estimating the beam-tip displacement. Based on the analytical model and the extended formulation, failure mechanisms of the test specimens were implemented into a computer program to facilitate the calculations. All seven subassemblies were analysed using this program, and the results were found to be in good agreement with those obtained from experimental study. Design curves were also developed to be used by practicing engineers. In the numerical part of this study, all specimens were analysed by a nonlinear finite element method using ANSYS software. Numerical analysis was performed for three purposes: to calculate the first yield load of the specimens in order to manage the tests; to investigate the ability of the web-bonded FRP system to relocate the plastic hinge from the column face toward the beam; and to calibrate and confirm the results obtained from the experiments. It was concluded that numerical analysis using ANSYS could be considered as a practical tool in the design of the web-bonded FRP beam-column joints.

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