Marine Structures for Steel Applications

Formation of static systems of marine structures for steel applications (jetties, trestles, dolphins, offshore platforms, offshore wind turbines), selection of suitable cross-sections, connection detailing, link of design with method of construction. Modelling of marine steel structures (selection of software, finite elements type and mesh, connection modelling). Methods of analysis of marine steel structures (static & dynamic analyses, linear & non-linear analyses, evaluation of results). Dimensioning (Checks according to the limit states philosophy, design requirements – failure criteria, member design – buckling lengths, joint design, fatigue). Structural drawings of steel structures (General layout, shop, assembly and erection drawings).

C. Gantes, P. Thanopoulos

 

 

Design of Structures II

Programming structures. Study procedures of construction and supervision. Morphology,bridge systems made of concrete and steel. Selection criteria of bridge systems. Modern construction methods. Mechanized methods of bridge construction (prefabricated beams, cantilever, forwarding, propelled trucks). Cable bridges - Aerodynamic stability. Cable Bridge MILLAU (viewing DVD, method of construction, selection criteria, etc.). Structures for the Athens Olympic Games in 2004 (viewing DVD, comments on the design and construction etc). Structures for the Olympic Games in China in 2008 (viewing DVD, comments on the design and construction etc). Fatigue of steel and composite bridges - Examples. Specific issues of seismic bridge calculation - Examples.

Design of Cable and Membrane Structures

"Design of cable and membrane structures" is an elective course of the Multi-disciplinary Program of Graduate Studies "Structural Analysis and Design", introducing the students to issues pertaining to the behavior, analysis and design of tension structures.

The objectives of the course are multiple: (a) to understand the peculiarities of behavior and analysis of such structures, due to their lack of compressive, shear and bending stiffness, and their resulting flexibility to transverse loads, which leads them to nonlinear behavior, (b) to present their significant advantages for covering large spans, either in roofs or in bridges, (c) to address technological issues regarding their materials of construction, connections, the importance and ways of application of pretension, and the erection methods, and (d) to be introduced to design methods of structures including cables and membranes: individual cables, guyed towers, suspended and cable-stayed bridges, cable roofs, cable nets, prestressed and air-supported membranes.

The course is taught by Ch. Gantes. There are 2 hours of class per week, for 13 weeks.

The students carry out, alone or in pairs, a term project, consisting usually of both a literature survey and original calculations, on a topic they select in consultation with the faculty. Deliverables include a short technical report and a powerpoint presentation in public, during the last week of classes. In addition, the course has a final examination.

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