Interstory drift based scaling of earthquake ground motions

Eren, Numan
Sucuoğlu, Haluk
Pinho, Rui
A novel amplitude scaling procedure is proposed in this study where the ground motion scaling factors are defined as the ratio of interstory drift distributions under target spectrum versus under the associated ground motion spectrum. The advantage of employing interstory drift ratio in ground motion scaling, compared to employing spectral intensity directly, is that it provides a strong theoretical link between the target spectrum intensity and the fundamental dynamic characteristics of the structure. Hence, scaling is conditioned on structural response, which is in turn a function of seismic intensity. The interstory drift-based scaling procedure (IDS) is presented herein for planar frames for brevity. Accuracy and efficiency of the IDS procedure is assessed under a set of near fault strong motions from large magnitude events. The results revealed that the proposed procedure is accurate since the resulting bias in estimating linear elastic interstory drifts is negligibly small. Further, it is noticeably more effective as compared to the conventional procedures suggested in recent seismic codes, yet it is simpler.


Interstory drift based scaling of bi-directional ground motions
Sucuoğlu, Haluk; Eren, Numan; Pinho, Rui (2022-09-01)
The interstory drift-based scaling procedure (IDS) developed recently by the authors for plane frames under single component horizontal ground motions, has been extended to three-dimensional structures possessing torsional coupling under bi-axial ground motions which are represented by their geometric mean spectrum. The ground motion-scaling factor is defined as the ratio of average interstory drift along building height under target spectrum versus that under the associated ground motion spectrum. Hence, s...
Multi-Mode Pushover Analysis with Generalized Force Vectors
Sucuoğlu, Haluk (2009-07-01)
A generalized pushover analysis procedure is developed for estimating the inelastic seismic response of structures under earthquake ground excitations. The procedure comprises applying a generalized force vector to the structure in an incremental form with increasing amplitude until a prescribed seismic demand is attained. A generalized force vector is expressed as a combination of modal forces, and simulates the instantaneous force distribution acting on the system when a given interstory drift reaches its...
Attenuation modeling of recent earthquakes in Turkey
Gulkan, P; Kalkan, E (2002-07-01)
This paper deals with the derivation of a consistent set of empirical attenuation relationships for predicting free-field horizontal components of peak ground acceleration (PGA) and 5 percent damped pseudo acceleration response spectra (PSA) from 47 strong ground motion records recorded in Turkey. The relationships for Turkey were derived in similar form to those previously developed by Boore et al. (1997) for shallow earthquakes in western North America. The used database was compiled for earthquakes in Tu...
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Karaağaçlı, Taylan; Özgüven, Hasan Nevzat; Department of Mechanical Engineering (2020-12-24)
In this work, two novel nonlinear system identification methods are proposed in both the modal and spatial domains, respectively, based on response-controlled stepped-sine testing (RCT) where the displacement amplitude of the excitation point is kept constant throughout the frequency sweep. The proposed nonlinear modal identification method, which is also a nonlinear experimental modal analysis technique, applies to systems with several nonlinearities at different (and even unknown) locations (e.g. joint no...
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Köse, Neslihan; Salor, Oezguel; Leblebicioğlu, Mehmet Kemal (2010-09-01)
In this paper a spectral decomposition-based method for interharmonic computation is proposed for power systems where the fundamental frequency fluctuates significantly. In the proposed method, the frequency domain components of the voltage waveform are obtained by Kalman filtering. Both the system fundamental frequency and the correct spectrum of the voltage waveform, and hence the exact interharrnonics are obtained. The proposed method is tested with both simulated and field data obtained from different e...
Citation Formats
N. Eren, H. Sucuoğlu, and R. Pinho, “Interstory drift based scaling of earthquake ground motions,” EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: