A PRACTICAL ALGORITHM FOR MODELING OF FRICTION DAMPED-BASED STRUCTURES

With the emergence of friction damper, it becomes economically feasible to significantly increase the earthquake resistance and damage control potential of a structure. Friction dampers are of the most efficient methods of dissipating seismic energy. In general, friction tools well perform against earthquake and their response is independent of loading range, frequency and number of loading cycles. Damping through friction tends to be one of the most efficient methods of dissipating seismic energy. Therefore,dynamic modeling of friction dampers have found a significant aspect in the exploration of performance and reliability of them within structures. However, traditional methods are highly depending on the rectangular hysteretic loop in which the whole structure behavior is only modelled by spring-mass system. This paper deals with a practical algorithm to analyze the behavior of various bending, braced, and specifically friction–damped based structures. The novelty of the presented algorithm is hysteresis-less essence that enables the multi-degree of freedom analysis of structures based on master and slave degrees of freedoms, dynamically through solving reduced order motion equation without the knowledge of mechanical hysteresis loop. Moreover, Numerical results show that the computational complexity of the presented method is one fifth of the traditional ones at higher story buildings.

کلیدواژه ها:

Analytical modeling ، Coulomb friction ، condensed motion equation ، Friction damper