Design, modeling and dynamic performance of outrigger system view as structural control and selfcontrol structures

Abstract

One of the best way nowadays of protecting and assure the safety of a building subjected to stochastic external excitations (Earthquake, strong wind, large waves, etc) is to use structural control strategy. This technic was really improved during the time and is without any doubt reliable and efficient. Unfortunately it is almost used without a high knowledge or any specific parametrizing because a deep and solid background work was not really done. So in this thesis, we have built some self control systems in order to quench vibration in specific physical systems particularly mechanical structures. It is done firstly by using outrigger systems (a structural control system) attached on cantilever beam and secondly by the association of pendulums. The excitations responsible of vibration in the system are from two main natures: earthquake and wind loads. And it results that for outriggers and added branches, a damping effect is observed and the damping ratio is increased with the number of added devices. While for a set of pendulums, the design system behaves like trees and vibration is controlled due to the exchange of energy between the main trunk and the branches.