تحلیل عملکرد سازه های فولادی با بی نظمی های A3 Performance Analysis of Steel Structures with A3 Irregularities

1 Introduction Studying the durability of structures against earthquakes, determining the parameters that afect earthquake safety analysing them have gained even more importance with the infuence of destructive earthquakes experienced in recent years. With these reasons, determining the earthquake behaviours of structures and their safety has been included among the current concerns of earthquake engineering. Considering the earthquakes experienced, heavy damages and collapses in structures show that these structures do not have sufcient safety. This is why it is important to know the factors that will afect the durability of structures against earthquakes while examining their behaviours under an earthquake. The factors are also considered in structural design. As the defencelessness of structures increase, the damage created by an earthquake will also increase. The magnitude of the earthquake, cases where structures failed to meet adequate levels of safety and conditions that are set forth in regulations, that is, structural characteristics, will afect the damage that may occur in the case of an earthquake directly. In the case that structural design is planned to be simple and regular, it will be easier to assess the behaviours of structures during an earthquake and conduct an analysis accordingly. The basic rule of the design under an earthquake efect is that the load-bearing system is as plain and simple as possible to ensure that the earthquake behaviour of the building is predictable, because there are uncertainties in earthquake ground motion, structural modelling and structural element behaviour, as well as the approximations in analysis and design methods (TBDY 2016). The probability of damage to the buildings that are not taken care of during design and construction varies depending on the extent of the earthquake (Celep and Kumbasar 2004). There are some irregularities in the buildings especially due to various reasons during the design. The resulting structural irregularities afect the seismic performance of buildings (İnel et al. 2007; Jereen et al. 2017; De Stefano et al. 2014). Knowing the parameters which can negatively afect the earthquake performance of structures and taking special measures against them in an earthquake-resistant structure design will positively afect the defensive mechanism of the structures (Işık et al. 2016). Structural damage evaluation is an important aspect in the assessment of the inelastic response of structures subjected to large alternate actions. The nature and amount of structural damage depends on the nature of the loads acting on the structures and the quality of the materials that compose the structural and non-structural elements, on the type and confguration of structural systems (Hadzima-Nyarko et al.