Study On Active Seismic Control Of Building Structures

In recent years,earthquake disasters occur frequently in China,causing serious damage to people's lives and property,in addition,with the continuous development of building technology,the number of layers and the structure of the building is also increasing,the traditional use of high-strength building materials to resist the earthquake has been unable to meet the requirements,and increase the cost of the project cost.So,scholars have considered the application of various control algorithms in the seismic control of building structures and achieved satisfactory results.The traditional centralized control strategy uses a single controller to control the whole system,in order to overcome the low efficiency of information processing and the failure of the central controller which will lead to the paralysis of the whole system.The authors propose a decentralized control strategy,and combine the various active control algorithms with.In this paper,the theoretical analysis and simulation analysis of the decentralized control for high-rise building structures are carried out.The main research contents are as follows:(1)For the Benchmark problem in the seismic control of structures,the development process and evaluation indexes are introduced in detail,and introduced the parameters of the 3 layer and 20 layer building structures in detail.(2)Introduced the active control algorithm,mainly for linear two type classical optimal control algorithm(LQR)and sliding mode control algorithm(SMC)is analyzed,and finally through the MATLAB/Simulink simulation were carried out,through the final simulation results show that these two control algorithms have good control effect on the seismic response of structures.(3)For the centralized control method to the problems and that introducing the decentralized control method,bring a complex large system decompose into several subsystems.The LQR control algorithm and SMC control algorithm is applied to the research on the seismic control effect,through MATLAB/Simulink simulation,proved that it has good control effect finally.(4)The causes of chatter for traditional sliding mode control algorithm and the current solutions are introduced in detail.By using hyperbolic tangent function to improve the conventional reaching law,puts forward a kind of based on hyperbolic tangent function without chattering of sliding mode control algorithm,and with 20 floors Benchmark model as the research object,the simulation analysis of the overhead,the results showed the effectiveness of the method.