Modeling of a multi-storey steel structure using TBDY-2019 and steel structures regulation-2016

Nowadays, earthquake regulations and new steel structure specifications in our country have been updated on the rules of how steel structures can be constructed for transverse and transverse systems. The cross members have a significant effect on the behavior of steel structures under earthquake loads. Cross-types to be used in steel structures must change the behavior of the structure to a great extent and meet the design criteria. In accordance with the relevant section of the earthquake regulations applied in our country, the structural performance must be determined. In addition, in accordance with the new Turkish steel structure specifications that came into force in 2016, each element is designed according to the bearing capacity method. According to this regulation, the civil engineer is offered 2 different ways. The engineer can either analyze the structure by working with increased loads (LFRD-SAI) or unloaded loads (ASD-GKT). In this study, two steel structures with 5 and 13 floors are modeled as crossed and noncrossed according to 3 different ground types. In the comparison of each structure, natural shear period base shear force, floor displacements, relative floor displacement, energy absorption capacities and plastic hinges formed as a result of analyzes were examined as the main parameters. The analyzes were performed using ETABS structural analysis program. The plastic joint properties of the elements in the steel structure models were solved by calculating the program. According to the analysis results, X-crossed system showed more rigid behavior than other systems. At the same time, initial stiffness is higher than other models. Interchangeable corner cross systems (KNE-BRACING) have the highest ductility. The plastic joints formed in the moment frame systems are transferred onto the diagonals in the diagonal models, so that the carrier elements remain at a certain level of damage in the final state of the structure. The energy absorption capacity of the cross members tended to increase as the number of crosses used in a frame increased. As expected, the replaceable corner cross system placed at 4 corner points reached the highest ductility level and provided the greatest energy absorption capacity.