The following are the shapes of models considered for the analysis of the ATCT. It is 1assumed all columns and Cores are fixed at the base. All beams are I sections, and columns are Box sections. All beam to column connections are fixed, while all the radial beams have pin connections. The inner core is connected by radial beams that are designed to support the staircase. An opening is provided at the bottom for people to enter the ATCT. The outer core is connected to MRF through circular beams. The structural system of the tower is a dual system consisting of a steel moment-resisting frame and which is supported on two concrete cores. The general sectional elevation for the study is as shown in Fig. The analysis of the Air traffic control tower is done using ETABs software (2016). In the present study, the analysis of ATCT for different structural shapes (viz., Hexagonal, Octagonal, Pentagonal, Square) with a height of 55m has been investigated. They concluded that it was unwise to consider them as rigid diaphragms which constraint side wings together at specific elevations. By increasing the stiffness of slabs (increasing thickness), the maximum deformation capacity of the structure can be greatly modified. The cracking pattern in the pushover analysis showed that the floor diaphragms do not have enough stiffness to connect the wings correctly. The first cracks initiate in the floor slabs at a very small proportion of the ultimate lateral displacement capacity of the tower and broaden quickly with the increase of the lateral load. Sassan Eshghi and Hooman Farrokhi studied the concentrated loads located at the top of the structure, and with increasing these loads, the cracking in the tower was traced. It was concluded that only the shortest tower could satisfy the expected seismic performance objectives. Results indicated that the intensity of seismic-induced damage to the tallest tower was significantly more than that of the shortest tower. Alih, that records with a low PGA/PGV ratio imposed the highest level of damage to the towers. It was observed by MohammadrezaVafaei and Sophia C. In the future, special care should be paid when using linear and pushover analysis for the seismic evaluation of air traffic control towers. It was concluded that conventional linear and pushover analysis did not accurately reflect the seismic behavior of the tower investigated over the course of this study. Rahman studied the seismic performance of Kuala Lumpur International ATC tower, with a height of 120m was investigated. Mohammadreza Vafaei, Azlan Bin Adnan, Ahmad Baharuddin Abd. If the control tower cannot operate properly, due to structural or non-structural damages during earthquakes, the airport may experience some long-term disabilities.ĭespite the significant role that ATCT plays in the functionality of airports, only a few researchers have studied the seismic performance of these structures. Therefore, no landing or takeoff may take place if the control tower is shut down, and the whole functionality of the airport will be halted temporarily. To have organized air traffic, each airport is usually served by one or more control towers. One of the most important facilities at an airport with a direct influence on the serviceability is the air traffic control tower (ATCT). Airports are among the most important infrastructures that should keep their serviceability during and after severe earthquakes to manage their crucial workload and critical role. The prime services available at the airports are often the facilities to store and maintain aircraft, and a control tower. However, due to more lateral resisting capacity, the drifts and displacements are found to be least. The seismic analysis also shows that the octagonal shape attracted larger base shear than pentagonal, hexagonal, and square shaped ATCT. The results exhibited that the performance of octagonal and hexagonal configurations was effectively better for seismic loads as compared to the pentagonal and square configuration in respect of story displacement, story drifts, story shear, and time periods. The structural performance of these models has been studied by different time history analysis using commercial software ETABs. However, the performance and demands of ATC towers differ significantly from common structures. Due to a lack of adequate information about the seismic analysis, the performance of ATCT is generally considered to be the same as that of normal structures. The primary purpose of ATCT is to prevent collisions and shape the flow of air traffic. Air Traffic Control Towers (ATCT) is one of the obligatory infrastructures for the airport to control the takeoff and landing of airplanes.
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