Degrees of freedom (mechanics) 1 Friction 1 Friction tuned mass damper 1 Ground motion excitation 1 Ground-motion 1 Ground-motion excitation Multi-story frame 1 Multi-story frames 1 Particle swarm 1 Particle swarm optimization 1 Particle swarm optimization (PSO) 1 Sensitivity analysis 1 Single degree of freedom 1 Single degree of freedoms 1 Structural control 1 Structural dynamics 1 Structural frames 1 Structural optimization 1 Swarm optimization 1 Tuned mass dampers 1 Vibration control 1