APPLICATION OF SPECTRAL ELEMENT METHOD ON DYNAMIC ANALYSIS OF SPACE TRUSS SUBJECTED TO SEISMIC LOAD
ZHANG Jun-bing ZHU Hong-ping WANG Dan-sheng GE Dong-dong
(1. School of Civil Engineering & Mechanics, Huazhong University of Science & Technology, Wuhan 430074, China; 2. Hubei Key Laboratory of Control Structure, Huazhong University of Science & Technology, Wuhan 430074, China)
Abstract：Abstract: An extended spectral element method (SEM) is established to get the dynamic responses of space truss subjected to seismic load. The seismic load is equivalent to concentrated node forces by integrating the shape function in SEM base on the principle of virtual work. Both internal viscoelastic damping and external viscous damping of truss bar are considered by just simply modifying the wave number. Laplace transform instead of fast Fourier transform (FFT) is utilized in SEM to avoid the periodicity of FFT. To evaluate the accuracy of Laplace-based SEM, the dynamic responses of a space truss under seismic load is analyzed as a numerical example. The numerical results obtained from FEM are compared with those from SEM. It has been found that the SEM provides good dynamic results under seismic load. The equivalent seismic node forces are convenient to get by programming calculation. The SEM has been proved to be an efficient method to analyze the dynamic of structures accurately while the number of elements can greatly decrease.
张俊兵;朱宏平;王丹生;閤东东;. 波谱单元法在空间桁架地震响应分析中的应用[J]. , 2011, 30(5): 245-251.
ZHANG Jun-bing ZHU Hong-ping WANG Dan-sheng GE Dong-dong. APPLICATION OF SPECTRAL ELEMENT METHOD ON DYNAMIC ANALYSIS OF SPACE TRUSS SUBJECTED TO SEISMIC LOAD. , 2011, 30(5): 245-251.
2011, Vol. 30 
