The Effect of Structural Ductility on the Selection and Scaling of Ground Motion Records

Nonlinear dynamic analysis is becoming increasingly common in practical engineering, especially in the seismic assessment and design of structural systems. The seismic design codes require selecting and scaling the earthquake ground motion data concerning a target response spectrum for the dynamic analyses. In the 2018 Turkish Building Earthquake Code, earthquake ground motions are selected considering the magnitude, distance to fault, shear wave velocity of soil (V_S30), and fault types of ground motions. In this study, a new algorithm is evaluated for selecting the ground motion records by accounting for the ductility ratio of the structural systems. The evaluated algorithm considers the structural ductility along with the magnitude, distance to fault, V_S30, and fault type in selecting the ground motion. Moreover, the efficiency of the ductility ratio algorithm and maximum inter-story drift in the SDOF system is compared by the ground motion record sets selected and scaled concerning Conditional Mean Spectrum (CMS) and Turkish Building Earthquake Code 2018 (TBEC-2018). The efficiency of matching the mean of the response spectra of the selected ground motion record sets with the target spectrum was examined by considering diverse structural ductility cases.