惯容-非对称悬挂结构减震系统随机地震动响应特性研究OA

To address the issues of complex response analysis and significant horizontal and vertical seismic responses of long-span asymmetric suspended structures under random seismic excitation,this paper proposed concise closed-form solutions for the 0th-to-2nd-order spectral moments of random seismic response spectra,as well as a strategy to suppress structural seismic responses using inerter systems.Additionally,it investigated the random seismic response characteristics of the inerterasymmetric suspended structure vibration reduction system.First,based on D'Alembert's principle,the seismic motion equations of the vibration reduction system composed of the inerter-asymmetric suspended structure were established.The equivalent seismic equation of the vibration reduction system was derived by comprehensively applying structural dynamics theory and finite element technology.Second,based on the power spectrum quadratic decomposition method,the concise closed-form solutions for the 0th-to-2nd-order spectral moments of the nodal displacements of the suspended structure and the forces in the inerter system under Ou Jinping-type random seismic excitation were obtained.The accuracy of the proposed solution method was verified through specific calculation examples,and the role of the inerter system in vibration reduction of suspended structures was explored.The research results show that the inerter system has a significant vibration suppression effect on the horizontal and vertical vibrations of asymmetric suspended structures.The proposed method can be extended to the random seismic response analysis of complex structures.