M.Sc. Tezi Görüntüleme | |||||||||||||||||||||
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| Summary: In this paper, actual earthquake records are selected and scaled to code design acceleration spectrums. Seven near fault and seven far fault ground motions are selected from PEER strong motion database. The time domain scaling procedure is utilized to scale the available actual records to match the proposed target spectrum given in the Eurocode 8 (1998-1: 2004). In the first chapter, general information is given about time history analyses which have been used commonly for design and consideration of structures. Sources of earthquake records which must be used to be able to carry out such analysis are mentioned. Also, two methods; time domain method and frequency domain method used for scaling actual earthquake records are specified together with their calculation guidelines. In the second chapter, mathematical formulation of the steps of linear time history analysis is presented. In the third chapter, calculation steps of the time domain scaling procedure are programmed by Graphical User Interface (GUI), MATLAB and a new scaling program are developed; SESCAP. Results obtained from this new model are used for time history analysis of a screw bridge modeled with SAP2000 as both isolated bridge and non-isolated bridge. In the fourth chapter, values of internal forces of the deck and values of bending moments of the abutment are presented with graphics and compared with each other considering either scaled cases or unscaled cases of the earthquake records. In the fifth chapter, firstly all of the obtained data about bridges are evaluated and then the effects of near fault ground motions on the structural response are compared with ones of far fault ground motions.
Key Words: Time history analysis, Selection of earthquake records, Scaling of earthquake records, Time domain scaling procedure | |||||||||||||||||||||