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Project name: Steel Radar Towers for ship navigation services
Technology: Spiral Structure
Investor: Republic of Turkey Ministry of Transporation, Shipping and Communication
Locations: İzmir (11 tower), İzmit (3 tower), Mersin-İskenderun (7tower) Marmara Bölgesi (3 tower)
The “Radar Towers” project unique structure, permeable texture, transparent features within the viewpoint of a seaside environmental context, success in architectural solutions and details, new structural system for the construction sector, and innovatively contributing towards the image of the steel industry using a unique patented steel technology in harmonious compliance with the other criteria
This system’s elements are light and large enough to a labor can lift and carry it. In addition, it preferred to use because there will be no water and wind trap when the tower installation has finished. Architecturally, two cylinders formed by intertwining each other considered. With the elliptical end of the outer cylinder, the lightning rod system, which should be higher than the radar unit which is located at the top of the ellipse. Thus, the rotating radar antenna is unobstructed. The tower is located at the courtyard within a square of prefabricated units. The red color has select ed for aircraft warning on the outer cylinder, and the white color has used on the inner cylinder
The contrast image of a technological building in nature has been a magnificent result obtained without resorting to artificiality
Advantages of the System
a) The spiral element system makes it possible to manufacture at a lower cost than exist ing systems due to its technical structure. In general, the spiral element system’s cost benefit has estimated at around 30% to 40% based on our preliminary design and calculations, and it has aimed to obtain solutions that will reach these estimated values in our project
b) Spiral element system is a system with higher earthquake resistance than the exist ing system due to its technical structure. Due to its technical structure, it is the system with the highest capacity to absorb earthquake energy. Shear force is the most effective force during an earthquake. The spiral element will be the only element that convert s shear force into tension and compression. exist ing tensile profiles do not have such a feature. In exist ing systems, this advantage cannot obtain by thickening the section, on the contrary, it makes the structure more rigid and reflects the earthquake load to more structures. Due to the spiral structure of the spiral element, its flexibility is high. Due to the lightness of the system, it also has a feature that can absorb earthquake energy. Even if this energy causes permanent deformation in the two-dimensional spiral system, it remains local in the body and does not affect the entire structure
c) The manufacturing and assembly time for the exist ing extruded profiles requires more time longer than the spiral steel structure that we will develop in exist ing systems. While the spiral element structure system is in a modular structure, the time of assembly will do, more quickly with small parts with bolts and nuts, and the element structure system does not require welding during assembly
d) Structures at tower type (poles), the wind load is at the lowest level in the spiral element structure system. The dynamic load is low as well
e) Due to its shell structure, applying this method in structures with large spans (100 m and more) in the form of arches, vaults and domes will provide great economy and convenience. The system is at least 30% lighter than its equivalents and its modularity will bring advantages in manufacturing, assembly, and transport
f) Since the spiral element building system is modular in nature, it is easier to repair and replace a module
g) It is suitable for all kinds of structures due to its applicability to architectural designs and variable geometry. Due to this structure, it is practical and easy to apply on arches, vaults, and domes
h) Static calculations of spiral structure systems, calculated in three dimensions by entering the necessary moments and loads. Round bar and blades used for spiral are STD. Spiral structural elements manufacture as modules with a length of six to six and half meter. These modules will not deform at all galvanization process
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