Bounding of earthquake response via critical double impulse for efficient optimal design of viscous dampers for elastic‐plastic moment frames

An input velocity adjustment method of the critical double impulse (DI) is presented for efficient design viscous dampers elastic-plastic moment frames. The adjusted so that energy to lowest eigenmode under DI equal those selected recorded ground motions. This makes work as active earthquake. response bounding property supported by, (1) multi-modal DI, (2) usual excitation mode motions, (3) large proportion instantaneous total in DI. proposed can treat not only pulse-like near-fault motions but also random nature. To validate method, energies and maximum interstory drifts with are investigated elastic single-degree-of-freedom (SDOF) models, proportionally damped MDOF models. optimization previous paper extended be treated