Abstract
The problem of vibrations in civil structures is common; nevertheless, its negative effects can be significantly reduced using structural control methods with intention of maintaining structural welfare as much as possible. This work deals with the study of structural vibration control in a model of a civil-like structure, which consists of three-level building with a tuned mass damper implemented as a passive vibration absorber, mounted on the top of the structure, to attenuate the harmonic vibrations provided by an electromagnetic actuator connected at the base of the primary system. The action of the tuned mass damper is evaluated from an energy approach. The dissipation of energy in the overall system is conducted in an experimental way, where the passive control technique is designed to minimize the undesirable forced dynamic response of the main structure via the tuned mass damper. Experimental results are provided to show the effective performance of the proposed passive vibration absorption scheme to suppress resonant frequency harmonic excitations disturbing the primary system, evaluating the performance energy and contribution of the dissipative device for the energy release in the overall system.
Highlights
The occurrence of natural events related to seismic activity or earthquakes has become of great interest for the engineering and scientific community worldwide, for the civil engineering one
The tuned mass damper (TMD) is a type of passive mechanism designed to reduce a particular frequency or vibration mode on some structure. This device is composed of a mass, a spring and a damper, which represent a secondary system, attached to a structure to minimize its movement or displacement completely where vibration energy is dissipated from the structure via dissipative elements that are a part of the TMD system
The analysis of vibrations in civil structures was investigated using a simplified numerical model of three floors perturbed by an external force at the base
Summary
The occurrence of natural events related to seismic activity or earthquakes has become of great interest for the engineering and scientific community worldwide, for the civil engineering one. The design and construction of hazard-resistant structures like buildings and skyscrapers are necessary in modern cities.1–3 These designs implement schemes of structural control very useful for real applications with the intention to reducing the negative effects such as the risk of crack or collapse caused by an earthquake. The tuned mass damper (TMD) is a type of passive mechanism designed to reduce a particular frequency or vibration mode on some structure. The principal intention is to analyze the performance of a passive vibration control scheme in order to reduce the overall vibration response under movements provided by external forces using an electromagnetic actuator where the results obtained can be extended to the case in which the excitation is due to earthquake or even dynamic wind loads. In sections ‘‘Passive vibration absorber’’ and ‘‘Energy dissipation,’’ results of the passive vibration absorber from an energetic point of view are shown
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