Correlation study between ground motion intensity measure parameters and deformation demands for bilinear SDOF systems

摘要

The correlation between ground motion intensity measures (IM) and single-degree-of-freedom (SDOF) deformation demands is described in this study. Peak ground acceleration (A PG), peak ground velocity (V PG), peak ground displacement (D PG), spectral acceleration at the first-mode period of vibration [A S(T 1)] and ratio of V PG to A PG are used as IM parameters, and the correlation is characterized by correlation coefficients ρ. The numerical results obtained by nonlinear dynamic analyses have shown good correlation between A S(T 1) or V PG and deformation demands. Furthermore, the effect of A S(T 1) and V PG as IM on the dispersion of the mean value of deformation demands is also investigated for SDOF systems with three different periods T=0.3 s, 1.0 s, 3.0 s respectively.