توصيفگر ها :
سيستم كنترل غيرفعال , ميراگر مبتني بر اينرتر , ميراگر ويسكوز اينرسي چرخشي , ميراگر اصطكاكي , جابجايي نسبي جانبي طبقات , جابجايي پسماند
چكيده انگليسي :
In this thesis, the study and analysis of passive control systems, particularly inertial dampers, have been explored. Inertial dampers, as passive control devices utilizing the principles of inertial physics, have been investigated to enhance the dynamic response of structures to seismic vibrations. Initially, the advantages of employing passive control systems, specifically inertial dampers, were examined. These dampers improve the performance of structures against earthquake vibrations, reduce relative floor displacements, and enhance the stability of structures. Subsequently, a uniform damper was analyzed, and its positive effects on lateral relative floor displacements and residual displacements during earthquakes were investigated. The results indicate a significant reduction in relative floor displacements by using inertial dampers. In linear structures, the maximum reduction in drift is approximately 60% compared to the case without dampers, while in nonlinear structures, the maximum reduction is around 50%. Additionally, the positive influence of friction in damper mode on residual displacement was examined, revealing that friction mode can improve residual displacement and reduce it by about 88% compared to the case without dampers, enhancing structural performance during seismic events.
Using the uniform deformation algorithm, an optimal number of dampers with and without friction in linear and nonlinear 3, 9, and 20-story structures were obtained. The results show that with this algorithm, the number of dampers in nonlinear structures with lateral relative floor displacement as the objective function decreased from 56, 126, and 120 to 52, 67, and 83 in the absence of friction, and from 56, 126, and 120 to 52, 65, and 80 in the presence of friction. For the objective function of lateral relative floor displacement and residual displacement in the absence of friction, the number of dampers in nonlinear structures decreased from 72, 315, and 540 to 51, 150, and 508, and in the presence of friction, it decreased from 72, 297, and 520 to 64, 225, and 437.
The results of using the uniform deformation algorithm in linear structures show a reduction in the number of dampers by about 2%, indicating that uniform distribution also optimally works in linear structures. These changes improve structural performance and limit displacements to acceptable code limits.
In conclusion, this thesis emphasizes the positive role and importance of inertial dampers in enhancing the performance of structures. It is suggested that these systems be considered as an effective solution in the design and construction of structures to mitigate seismic vibrations.
