| Title |
Variability of Seismic Demand According to the Selection the Earthquake Ground Motion Groups |
| Authors |
Han Sang-Whan ; Hwang Su-Min |
| Keywords |
Elastic Response Spectrum ; Response Modification Factor ; Inelastic Response Spectrum ; Performance Point |
| Abstract |
It is challenging task to predict seismic demand for earthquake resistant design. In current seismic design provisions, seismic demands are expressed as a design base shear of which the key components are linear elastic design response spectra, force reduction factor, and building weight. In recent years, new methods for predicting seismic demands have been developed such as Capacity Spectrum Method(CSM) and Displacement Coefficient Method(DCM). In the CSM a performance point is used for representing seismic demands. This study investigates the effect of different earthquake ground motion(EQGM) sets on seismic demands. Key components of the base shear and performance points in the CSM are considered as the seismic demands to be tested. For this purpose three EQGM sets are considered that were collected at rock sites by Miranda(1993), Riddell(1995), and Seet et al.(1976). This study found that seismic demands can vary significantly according to different EQGM sets. This study also attempts to reduce the variability in the seismic demands with respect to different EQGM sets. It is shown that the variability of seismic demands can reduced by using more refined classification criteria. |