چكيده به لاتين
Today, vibration control in the structure is done with the help of energy consuming systems. This leads to the reduction of the response of the change of location or acceleration of the structure against the side loads of the earthquake. Seismic isolation is one of the methods of controlling structures against seismic loads by isolating the structure from the ground. In this method, unlike other conventional methods in seismic strengthening and improvement of structures, which increase the resistance of the structure against lateral loads, by reducing the seismic response and the force and acceleration of the earthquake input to the structure, an attempt is made to reduce the damages. It is built. Adjusted mass damper is one of the types of dampers that are used to reduce the dynamic and seismic response of the structure and prevent the building vibration in the structures. Among the passive dampers that indirectly dampen vibrations by changing the characteristics of the system, the most important idea is to add a secondary mass that performs this action by changing the frequency response of the structure. Adjusted mass damper is one of the devices used for damping control. Irregularity in the structure can negatively affect the performance of the structure. In regular buildings, the structure's behavior against earthquakes is more coordinated and predictable, while in irregular buildings, the structure's behavior against earthquakes is more complex. In this research, irregular structures that have been improved with the help of adjustable mass dampers and lead seismic isolators, and the effect of using these tools in these types of structures on reducing their vulnerability to seismic loads has been investigated. took For this purpose, two steel structures of 10 and 15 floors with mass irregularity in three states without damper, with adjustable mass damper and with lead core seismic isolator were modeled in Abaqus finite element software and were subjected to earthquake loading with seven accelerometers. Results. They showed that the placement of each of the tools used in order to reduce the damage of the entered structures, such as the seismic isolator and adjustable mass damper, was considered, and the positive effect of each of them was observed on reducing the vulnerability of the structures. In general, for the considered structures, the effect of using the considered seismic isolator was greater than the adjustable mass damper in reducing the damage caused to the structures.
