Explicit optimal hysteretic damper design in elastic-plastic structure under double impulse as representative of near-fault ground motion

Abstract

A closed-form maximum elastic-plastic response is derived for a structure with hysteretic dampers under the critical double impulse as a representative of near-fault ground motion. It is shown that the classification into nine cases is possible depending on the combination of elastic-plastic responses of the structure and the hysteretic damper and the double impulse enables the derivation of the closed-form maximum elastic-plastic critical response of the controlled structure by using the energy balance in each case. It is demonstrated that the closed-form maximum elastic-plastic critical response is quite useful for finding an optimal hysteretic damper quantity depending on the input level of the double impulse.

Hysteretic-Viscous Hybrid Damper System With Stopper Mechanism for Tall Buildings Under Earthquake Ground Motions of Extremely Large Amplitude

“…This resulted in a tremendous amount of computational effort to reveal original properties of the optimal damper location and quantity. Compared to such conventional approaches, Shiomi et al (2016) introduced an innovative design method for hysteretic dampers using an explicit expression for the maximum elastic-plastic response of a SDOF system with hysteretic dampers under 'the critical double impulse' as a representative of near-fault ground motions (Kojima and Takewaki, 2015). Then an explicit optimization was performed using this explicit expression.…”