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Response of a frictional base isolator to random earthquake excitations
Responses of a rigid structure with a frictional base isolation system subjected to random earthquake excitations are studied. The ground accelerations are modeled by segments of stationary and nonstationary Gaussian white noise and filtered white noise processes. The technique of nonstationary equivalent linearization is used for the response analysis. The differential equation governing the covariance matrix is solved and for a range of values of parameters the root-mean-square displacement and velocity responses of the structure are calculated. The results are compared with those obtained by a series of Monte-Carlo digital simulations and reasonable agreement is observed. For several values of parameters, responses of the structure to the accelerogram of the North-South component of El Centro 1940 earthquake are studied. Particular attention is given to the effect of the elastic stiffness of the isolation system. It is shown that the slip displacement decreases sharply as the elastic restoring force of the isolator increases.
Response of a frictional base isolator to random earthquake excitations
Responses of a rigid structure with a frictional base isolation system subjected to random earthquake excitations are studied. The ground accelerations are modeled by segments of stationary and nonstationary Gaussian white noise and filtered white noise processes. The technique of nonstationary equivalent linearization is used for the response analysis. The differential equation governing the covariance matrix is solved and for a range of values of parameters the root-mean-square displacement and velocity responses of the structure are calculated. The results are compared with those obtained by a series of Monte-Carlo digital simulations and reasonable agreement is observed. For several values of parameters, responses of the structure to the accelerogram of the North-South component of El Centro 1940 earthquake are studied. Particular attention is given to the effect of the elastic stiffness of the isolation system. It is shown that the slip displacement decreases sharply as the elastic restoring force of the isolator increases.
Response of a frictional base isolator to random earthquake excitations
Beanspruchung eines Fundamentreibungsisolators bei regellosen Erdbebenanregungen
Ahmadi, G. (author) / Su, L. (author)
1987
6 Seiten, 7 Bilder, 17 Quellen
Conference paper
English