设置消能伸臂的高层建筑结构地震反应控制研究

Under the action of earthquake, the acceleration at the top of high-rise buildings is easy to exceed the standard due to its own acceleration amplification effect. The excessive acceleration may cause damage to the items in the building and seriously affect the comfort of living. In order to study the characteristics of acceleration at the top of high-rise buildings and the corresponding control strategies, research works were carried out on the high-rise building structures with damped-outrigger system. Firstly, the vibration equation of system under earthquake excitation was established based on Euler beam theory. Then, the influence of the damper stiffness coefficient and damping coefficient on the response at the top of the structure under earthquake was discussed based on the random seismic response. Finally, the LQR-accel algorithm considering the influence of acceleration was used to carry out active control analysis of the structure. The results show that there is only an optimal damping coefficient for reducing the acceleration response at the top of the structure. The smaller the stiffness coefficient is, the more effective it is. The optimal parameters can reduce the acceleration by about 30%. The active control can significantly reduce the acceleration response at the top of the structure, but the passive force accounts for a medium part of the optimal active control force, which is only 55.64%.