| The technology of energy dissipation can reduce the seismic response of structure by assigning special energy dissipation devices that dissipate most of earthquake input energy. Energy dissipation technology is accepted and popular in the field of engineering, because of the features of simple, facility, effective and economy. In order that energy dissipation technology is used widely in china, it is necessary to analysis and study the theory deeply. In the paper, friction energy dissipation is discussed mainly. Using nonlinear spring element and combination element, the finite element model of friction energy dissipating brace frame is established. By ANSYS finite element program the seismic response of a five-story frame structure with friction dissipating braces is analyzed, and is compared with that of the pure frame structure without brace and the brace frame structure without friction dissipation devices. The results show that the friction energy dissipating brace has obviously seismic vibration- suppressed effect, and decreases maximum response of structure sharply when earthquake occurs, and dissipates a great deal of earthquake input energy. Moreover, The influence of parameters, such as bracing stiffness, yielding displacement of the dissipater and different distribution of dissipating braces on the suppressive effectiveness of structure vibration is studied and some referential suggestion is presented for the design of passive energy dissipation system.
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