Performance evaluation of phase‐controlled semiactive resettable TMD (PCRTMD) with the stiffness retuning ability under strong seismic motions

Abstract

Summary Tuned mass dampers (TMDs), despite being efficient because the structure has not experienced damage and properties degradation, lose efficiency when the mechanical properties of the structure changes and detuning effects occur. Semiactive TMDs have been shown superior to the traditional passive ones and more efficient and reliable than the active counterparts for the detuning problem. This study presents a novel semi active system that is able to respond efficiently and maintain such a performance even in the case of structural damage. This scheme is composed of a variable stiffness component, a resettable element, and a friction brake. The system dissipates energy using the resetting mechanism and is able to change stiffness when the tuned frequency of the structure changes due to structural damage. The friction device is responsible for maintaining the TMD in the optimal phase lag to the structure, that is, −90°, and thus keeping the TMD in the optimal performance. This strategy has been tested on a single‐degree‐of‐freedom frame, to understand the system behavior under harmonic excitation, as well as a 10‐story shear type frame under strong seismic motions. The proposed system has shown to be effective and competent comparing analysis results to active and passive TMDs.

Compressive sensing‐based data loss recovery in the feedback channel of the structural vibration control systems

“…8 Passive TMD lacks the ability of real-time tuning; however, semi-active and active TMDs can change their behavior during motion. 9 Active TMDs that are of light weight and volume have attracted much more attention over the last years. 10 This type of response reduction mechanism consists of an actuator that exerts a force on the mass to generate the inertial force in the right direction.…”

“…Generally, there are three major strategies to regulate the control device, including passive, semi‐active, and active strategies 8 . Passive TMD lacks the ability of real‐time tuning; however, semi‐active and active TMDs can change their behavior during motion 9 . Active TMDs that are of light weight and volume have attracted much more attention over the last years 10 .…”

Vibration control of structures against near‐field earthquakes by using a novel hydro‐pneumatic semi‐active resettable device

“…Extensive numerical studies have been conducted to assess the performance of the resettable devices in structural seismic control by implementing different control schemes 6,7,11–25 . They proved strong capability of the resettable devices in controlling the structural responses under different vibration excitations.…”

“…10 Extensive numerical studies have been conducted to assess the performance of the resettable devices in structural seismic control by implementing different control schemes. 6,7,[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] They proved strong capability of the resettable devices in controlling the structural responses under different vibration excitations. In addition, experimental validations of the resettable devices have been performed on scaled and full-scale models.…”