In this article, we will look at the designed and implemented structures of the 3rd Airport of the Istanbul Airport. Before you go into the details of the structure, it’s a good idea to talk about the project. In fact, in spite of the fact that most of us know, the section opened in the near term is the only international terminal of the 3rd Airport. The construction of the remaining sections will last for about 8 years and the other departments will be opened gradually. The international terminal serves as both internal and external lines until the other sections are finished. Therefore, the article will be about the completed part of the project.
To mention the international terminal; The building consists of 1 parking lot, 1 terminal building and 5 quay buildings separated from it.
Considering that the part of the land in which the building is located before the marshland and its proximity to the Black Sea, we can understand that the foundation is the bored pile foundation system.
Although the foundations are the same, the other structural parts of the building are different in the terminal building and pier buildings.
First of all, consider the terminal building. Structure; the load transfer to the foundation is provided by the reinforced concrete core, reinforced concrete column and beams but due to the large openings required; the diameters of the columns and the height of the beams exceeds 1.5 meters.
Precast slabs are preferred considering the size of the project and construction period. Even in certain parts of the structure, wall widths exceeding 8 meters were made in a much shorter time by using reinforced gas concrete to lose time by masonry. Again, due to the large area covered by the structure, there are dilatations in many points of the terminal building. They make it work differently so that the whole structure is not damaged.
As a matter of fact; When you first enter the terminal building, it is hard to understand how many floors it is, because the completed project has different floors and floor heights everywhere. In fact, there are 3 different slabs that work with the reinforced concrete column and beam logic that transfer the load to the foundation. All other floors are connected to the betorname column with the help of steel anchors. The roof of the terminal building is made of steel beams and scissors. There are over a hundred frames to get natural light inside. The steel material used on the roof is covered with materials such as trapezoid, rock wool, drywall, galvanized glass and bemo (a coating material suitable for high speed winds).
Considering the scaffolding buildings; facade and roof in the terminal building with the difference in their own although they do not have a difference in the load of the reinforced concrete core, columns and entrances, even though the scaffolding of the façades of the columns used in the façades are preferred as steel instead of reinforced concrete.
Load transfer is provided this way. In order to accelerate the process, precast flooring was preferred. Space frame system is preferred on the roofs of the pier buildings. This system is covered with trapezoid, rock wool, gypsum board, glass and galvanized glass as in terminal and bemo is preferred as finishing material. In addition to the terminal and pier buildings, the reinforced concrete FLB towers which pass the passengers to the aircraft are connected to the scaffold buildings by means of steel shears and the passenger circulation from the aircraft to the terminal is provided in this way.
If we examine the facades of the building, there is no difference between them in the structural sense. In the entire structure, the loads of the facade are transferred to the foundation by means of anchor points with connections to the concrete slab. However, while the facade system is applied in the terminal due to the manufacturers, the stick facade is applied in the scaffolding buildings.