08-10-2014, 04:18 PM
Displacement-based design has been lately gaining importance due to the emergence of the performance-based engineering, and it is now becoming necessary to estimate maximum (inelastic) displacements of structures for different levels of seismic hazard. Being closely related to damage, displacement (or drift) has become an important parameter necessary to meet various performance goals. It is considered convenient to estimate the inelastic displacement demand in a structure by multiplying the elastic displacement demand of the structure with a ratio called as the inelastic displacement ratio. A comprehensive study has been conducted for the parametric dependence of the inelastic displacement ratio in single-degree-of-freedom (SDOF) systems with known relative lateral strengths, on strong motion duration, earthquake magnitude, epicentral distance and geological site conditions. This study is more rational than the earlier studies of similar type as other governing parameters have been kept fixed while effects of variation in any particular parameter are studied. This stud