Search for dissertations about: "bridge 2015"

Showing result 1 - 5 of 44 swedish dissertations containing the words bridge 2015.

2. 1. Development of connections for fibre reinforced bridge elements and an analysis of sustainability

   Author : Valbona Mara; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bridge; insert; connection; deck; FRP; bolt; joint; fibre reinforced polymer; LCC; LCA;

   Abstract : The deterioration of existing bridge structures due to a number of causes has led researchersto pursue new construction materials with high performance, such as fibre reinforced polymer(FRP) composite materials. The inherent properties of FRP materials are their light weight,high strength and high resistance to aggressive environments. READ MORE

4. 2. Bracing of steel bridges during construction; theory, full-scale tests and simulations

   Author : Hassan Mehri; Avdelningen för Konstruktionsteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bracing; steel-concrete composite; steel; bridge; test; construction; laboratory; experiment; experimental; theory;

   Abstract : A number of steel bridges have suffered lateral-torsional failure during their construction due to their lacking adequate lateral and/or rotational stiffness. In most cases, slight bracing can be of great benefit to the main girders involved through their controlling out-of-plane deformations and enabling the resistance that is needed to be achieved. READ MORE

5. 3. Systematic planning and execution of finite element model updating

   Author : Joakim Wallin; Costin Pacoste; Raid Karoumi; Mario Plos; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dynamics; finite element model updating; bridge; objective function; updating parameter; mode pairing; dynamik; finita element modelluppdatering; bro; målfunktion; uppdateringsparameter; matchning av moder; Civil and Architectural Engineering; Byggvetenskap;

   Abstract : In design of bridges and for estimation of dynamic properties and load carrying capacity Finite Element Method (FEM) is often used as a tool. The physical quantities used in the Finite Element (FE) model are often connected to varying degrees of uncertainty. READ MORE

6. 4. Cascaded Converters with Gate-Commutated Thyristors : Experimental Verification and Auxiliary Power Supply

   Author : Tomas Modeer; Hans-Peter Nee; Staffan Norrga; Dragan Jovcic; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : This thesis describes an effort to investigate the use of gate-commutated thyristors(GCTs) in cascaded converters. Cascaded converters, such as modularmultilevel converters (M2Cs) and cascaded H-bridge converters (CHBs), haveproved to be especially suitable in high-voltage, high-power applications. READ MORE

7. 5. Attempts to Bridge the Gaps : Opportunities and Challenges in the Communicative Constitution of Organizations

   Author : Therese Hedman Monstad; Mats Edenius; Amelie Hössjer; Josef Pallas; Peder Hård af Segerstad; Linda L. Putnam; Uppsala universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Organizational Communication; Communicative Constitution of Organizations CCO ; Empowerment Process; Coorientation; Ventriloqual Approach; Tension-Centered Approach; Tensions; Communication-Power Relationships; Participation; Medie- och kommunikationsvetenskap; Media and Communication Studies;

   Abstract : Globalization and technological advancements continue to challenge contemporary organizations’ aims to balance stability and change. As a response to this challenge, organizations often turn to empowerment and participatory processes. Current research emphasizes the need for enhanced communication in these processes. READ MORE