Investigation of the effect of near region ground movements on asteel building

In this thesis, the effects of ground motions on steel structures in areas near to faults are discussed. The behavior of steel structures under the effect of far-fault and near-fault scaled ground motions are examined. Eleven ground motion records near to the fault and three far faults records were selected from the PEER database in accordance with the design acceleration response spectra, taking into account the magnitude of the earthquake, fault mechanism, soil properties and the distance to the fault. After the scaling process were completed with the SeismoMatch program, nearly fourteen scaled records were obtained to be used in the analysis. These scaled records and real records were used in the time history analysis of the steel structure modelled in the SAP2000 program. This study prepared consists of four chapters. In the first chapter, the definition and properties of near faults, and the directional effect are explained. In the second part, three-dimensional models were created in the SAP2000 program and the models were analyzed. In the third part, the analysis results of scaled and unscaled records are evaluated by comparing the graphs of maximum acceleration, velocity and displacement values as well as the maximum values internal forces of structural members. In Chapter Four, the most important results and recommendations are explained in this study. When the results obtained from this study were examined, it was noticed that the analysis results of the unscaled records were generally more than ten times more than the scaled records. In addition, by comparing the analysis results obtained for far faults and near fault ground motions, the effects of earthquake ground motions on building behavior were tried to be emphasized. Key Words: Near Fault, Far Fault, Steel Structure, Scaled Earthoque Records, Time History Analysis