Effect of ground motion selection on seismic response of buildings

Karakütük, Özge
In this study, effects of ground motion selection and scaling procedure given in different earthquake design codes were investigated. To observe differences between the scaling procedures defined in various seismic design codes, these procedures are applied employing the response spectra defined in these specifications. Four reinforced concrete moment resisting frame buildings were used in the analyses. These buildings have 3, 4, 6 and 8 stories. This way, effects of scaling on low-rise and mid-rise buildings were studied. Material properties, structural member dimensions and span lengths of buildings were selected by considering the properties of the constructed reinforced concrete buildings in Turkey. Reinforcement of these buildings were determined with respect to TS 500. Two dimensional finite element models of these buildings were developed and necessary information for scaling such as fundamental period was obtained. Then, ground motion sets were selected and scaled for each building and each spectrum according to each procedure employed. Scaling procedures used and compared in this study are based on TEC-07, ASCE/SEI 7-10 and Eurocode-8. According to these specifications both response spectrum and time history analyses of the structures were performed. The results of these analyses were used to evaluate the effect of ground motion scaling on seismic response of low- and mid-rise reinforced concrete moment resisting frame buildings. Due to the criteria on scaling of ground motion recordings in all earthquake design codes used in this research, time-history analyses yielded more conservative results than response spectrum analyses. Scaling according to TEC-07 or Eurocode-8 procedures gave closer results to response spectrum analyses as compared to scaling with respect to ASCE/SEI 7-10. The difference between time history analyses and response spectrum analyses diminishes as the number of story increases. In other words, as the fundamental period of the structure increases the results of response spectrum and time-history design procedures converge.


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Burak Bakır, Burcu (American Society of Civil Engineers (ASCE), 2013-11-01)
An analytical study is performed to evaluate the effect of shear wall area to floor area ratio on the seismic behavior of midrise RC structures. For this purpose, 24 midrise building models that have five and eight stories and shear wall ratios ranging between 0.51 and 2.17% in both directions are generated. Then, the behavior of these building models under earthquake loading is examined by carrying out nonlinear time history analyses. In the analyses, seven different ground motion records are applied to th...
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Recently, many nonlinear analysis procedures have been proposed for earthquake response determination of the structures. Although, the nonlinear response history analysis (NRHA) is accepted as the most accurate source of information for nonlinear seismic response, nonlinear static procedures (NSP) may also provide reasonable estimates of seismic demand and inelastic behavior. However, all proposed NSPs have limitations, due to the certain approximations and simplifications, such as invariable load pattern a...
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A comprehensive study has been carried out to investigate the correlation between deformation demands of frame structures and a number of widely cited ground motion intensity parameters. Nonlinear response history analyses of single-degree-of-freedom (SDOF) and multi-degree-of-freedom (MDOF) models derived from sixteen reinforced concrete frames were carried out under a set of eighty ground motion records. The frames were selected to portray features of typical low-to-mid rise reinforced concrete structures...
Citation Formats
Ö. Karakütük, “Effect of ground motion selection on seismic response of buildings,” M.S. - Master of Science, Middle East Technical University, 2015.