Inelastic Deformation Demands of SDOF Systems Subjected to Ground Motions for Bangkok Area

Abstract

In this paper, a seismic ground motion database in Zone 5 of the Bangkok basin, classified in the DPT 1301/1302-61 standard, has been adopted to evaluate the seismic displacement demand of a perfectly plastic SDOF system. The results have been presented in the ratio of displacement of inelastic and corresponding linear systems. This ratio is the parameter that depends on the properties of the subsoil and is also an important coefficient to determine the target displacement in nonlinear static analysis, according to DPT 1303-57. In addition, this paper proposes a formula for estimating the coefficient that is suitable for Bangkok area.