Earthquake resistant performance of structure with complex damping model based on energy analysis
Abstract：Since the damping models used in current dynamic analysis could not describe the unknown material nonlinear energy dissipation in structures, the seismic energy equation for multiple degrees of freedom （MDOF） complex damping system was derived based on the stress related complex damping theory. The structure seismic response and material energy dissipation rule of the complex damping model were studied, and the material time varying loss factor of components and structures was calculated. The results show that in the total earthquake input energy, the material damping energy dissipation accounts for a large proportion, and monotonously increases with prolonging time. The material damping energy dissipation as well as its change rate, kinetic energy and strain energy of the structure all increase with increasing the input energy. The calculation of the loss factor indicates that compared with the conventional method, the material loss factor with adopting time varying form rather than constant form can exhibit the material damping effect more precisely.
Keywords：structure engineeringearthquake resistant performanceenergy analysiscomplex dampingmaterial dampingloss factortotal input energymultiple degrees of freedom（MDOF） system
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)