000013317 001__ 13317
000013317 005__ 20161114160336.0
000013317 04107 $$aeng
000013317 046__ $$k2009-06-22
000013317 100__ $$aSesigur, H.
000013317 24500 $$aDetermination of orthogonal combination coefficients using inelastic velocity response spectra

000013317 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013317 260__ $$bNational Technical University of Athens, 2009
000013317 506__ $$arestricted
000013317 520__ $$2eng$$aSeismic regulations and guidelines for buildings and bridges prescribe simplified combination rules to obtain the maximum structural response under multi-directional earthquake effects. An unfavorable internal force usually develops under the combined effects of an earthquake motion. In this study, the spectrum intensity concept is used to investigate the bi-directional effects of earthquakes on structures. For this purpose, a set of recent and past fifteen earthquakes (M>6) are selected to predict bi-directional effects. Inelastic velocity response spectra of these earthquakes are numerically obtained and plotted for damping ratios of ξ=0.05 and 0.20, representing a wide range of damped and heavily damped structures. Spectrum intensities for both orthogonal directions and for the resultant direction are calculated using a computer program developed for this purpose. Unfavorable response is then calculated by equating the resultant spectrum intensity to principle direction’s intensity plus the other direction’s contribution as a percentage of the principle component, or equating the resultant spectrum intensity to principle direction’s intensity plus a percentage of the other direction’s contribution, or vice versa. The results obtained are strongly earthquake-dependent. Based on this analysis, well-known building regulations are reviewed and evaluated by emphasizing the prescribed combination rules. Numerical results show that coefficient for the bi-directional contribution varies largely in the range between 0.01~0.98 for the selected force reduction factors of µ=2 and 8.

000013317 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013317 653__ $$aSpectrum Intensity, Inelastic Velocity Response Spectrum, Combination Rules. Abstract. Seismic regulations and guidelines for buildings and bridges prescribe simplified combination rules to obtain the maximum structural response under multi-directional earthquake effects. An unfavorable internal force usually develops under the combined effects of an earthquake motion. In this study, the spectrum intensity concept is used to investigate the bi-directional effects of earthquakes on structures. For this purpose, a set of recent and past fifteen earthquakes (M>6) are selected to predict bi-directional effects. Inelastic velocity response spectra of these earthquakes are numerically obtained and plotted for damping ratios of ξ=0.05 and 0.20, representing a wide range of damped and heavily damped structures. Spectrum intensities for both orthogonal directions and for the resultant direction are calculated using a computer program developed for this purpose. Unfavorable response is then calculated by equating the resultant spectrum intensity to principle direction’s intensity plus the other direction’s contribution as a percentage of the principle component, or equating the resultant spectrum intensity to principle direction’s intensity plus a percentage of the other direction’s contribution, or vice versa. The results obtained are strongly earthquake-dependent. Based on this analysis, well-known building regulations are reviewed and evaluated by emphasizing the prescribed combination rules. Numerical results show that coefficient for the bi-directional contribution varies largely in the range between 0.01~0.98 for the selected force reduction factors of µ=2 and 8.

000013317 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013317 720__ $$aSesigur, H.$$iCelik O., C.$$iCili, F.
000013317 8560_ $$ffischerc@itam.cas.cz
000013317 8564_ $$s678098$$uhttps://invenio.itam.cas.cz/record/13317/files/CD465.pdf$$yOriginal version of the author's contribution as presented on CD, section: Seismic design methods.
000013317 962__ $$r13074
000013317 980__ $$aPAPER