Analysis Of Active Control Of Mass Damping Of Building Structures Under Earthquake

With the development of society, super buildings constantly built, makes peopleto put forward higher requirements of the security and comfortable of the buildingstructures. The primary task of the structural design is to improve the capacity of standup to Earthquake and wind of the building structure. The vibration control study ofcivil engineering structures is a major breakthrough in seismic analysis of structures. Itis depended on the vibration control system of active or passive control to control thepower response of the building structures, it is widely used in modern engineering.In this paper, it is based on a high-rise building structures as an example thatunder the earthquake excitation, the active mass damper (AMD) active control ofstructural seismic analysis of control algorithm and computer simulation. Studied theoptimal design of active control force of actuators optimal layout design and thestructure of the sensor was used to optimize the structure of the high-rise building.Firstly, analyses the influence on structure of Arrangement position and thenumber of sensors, put forward use the improvement of adaptive genetic algorithm tostudy the optimization layout of the sensor of tall building structure, to achieve theoptimal design of sensor number by the genetic code of dual structure, and get theglobal optimum solution by adaptive probability value through genetic operators ofgenetic algorithm. The results show that the improved adaptive genetic algorithm canachieve good results on the layout of sensors of the building structures. Secondly, analyzes the control principle of active mass damper system, anddetermine the expression of the optimal parameters of control system, and achieved thevalues of control weighting matrix Q and R; Meanwhile, using the linear two quadraticoptimal control algorithm (LQR) to design the optimal active control force of actuators,and analyzes the influence on the structure of the active control force characteristics,discussed the system delay effect on active control system, and are compensated byphase shifting method, improved the effectiveness of active control.Finally, through MATLAB programming to analysis of the computer simulation,the simulation results show that the active control device changes the stiffness anddamping of the original structure, it can effectively reduce the vibration of structure.