Critical earthquake response of a SDOF elastic-perfectly plastic model with viscous damping under double impulse as a substitute for near-fault ground motion

Kotaro Kojima, Yoshito Saotome, Izuru Takewaki
2018 Japan Architectural Review  
The double-impulse input is introduced as a substitute for the fling-step nearfault ground motion, and a closed-form solution for the approximate elastic-plastic response of a structure with viscous damping under the "critical double impulse" is derived. Since only the free vibration appears under such a double impulse, the energy approach plays an important role in the derivation of the closed-form solution for a complicated elastic-plastic response with viscous damping. The quadratic function
more » ... approximation for the damping force-deformation relationship is introduced. The validity and accuracy of the proposed theory are investigated through comparison of the results of the response analysis to the corresponding one-cycle sinusoidal input and actual recorded ground motions. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
doi:10.1002/2475-8876.10019 fatcat:nmi6qhvlfbex7ljgraoar7x7a4