Control of structures with double tuned mass dampers optimized with metaheuristic algorithms

In recent years, the construction of large buildings, long-span bridges, and public buildings has become a priority in urban areas. These structures are exposed to dynamic natural forces such as strong winds and earthquakes, as well as dynamic man-made forces like vibrations from vehicles on bridges or machinery in certain buildings, especially industrial ones. If expert engineers do not appropriately design these structures to withstand these forces, significant loss of life and property damage can occur. One of the primary concerns of structural engineers today is to construct infrastructures capable of withstanding these dynamic external forces. To address this issue more effectively, new techniques have been developed to enhance the resilience of buildings against these forces. One such method involves using tuned mass dampers (TMDs), which aim to reduce the displacement of the structure under the influence of vibrational forces such as strong winds or earthquakes. The effectiveness of these dampers largely depends on the values of their physical properties, such as mass, stiffness, and damping. In this thesis, the effects of a single mass-tuned passive damper and a double mass-tuned damper are analyzed on a 92-meter-high reinforced concrete building structure under the simultaneous impact of wind and earthquake. The wind effects were calculated using the Eurocode 1-4 standard, and the wind forces acting on each floor of the building were then analyzed using SAP 2000. 1940 EL CENTRO earthquake data were used to represent seismic effects. A Matlab code was written using the Jaya algorithm, a metaheuristic algorithm, to determine the optimal values of the TMD and DTMD properties. The responses of the building without any control system under the simultaneous impact of wind and earthquake were compared with the responses of the structure with a TMD and DTMD placed on the top floor under the same external forces. The responses of the building without a TMD were more adverse than those of the building with either a TMD or a DTMD. Using double mass-tuned passive dampers was more effective in reducing displacement than using a single-tuned mass damper.