scholarly journals EARTHQUAKE RESPONSE CHARACTERISTICS OF AN EXISTING R/C BUILDING RETROFITTED WITH FRICTION DAMPERS

2008 ◽  
Vol 73 (628) ◽  
pp. 947-955 ◽  
Author(s):  
Hajime YOKOUCHI ◽  
Keiji KITAJIMA ◽  
Mitsukazu NAKANISHI ◽  
Hiromi ADACHI ◽  
Hiroyuki AOYAMA
Keyword(s):  
Earthquake Response ◽  
Friction Dampers ◽  
Response Characteristics

Friction Dampers: Measurement, Modelling and Application to Blade Vibration Control

1995 ◽  
Author(s):  
Kenan Y. Sanliturk ◽  
Anthony B. Stanbridge ◽  
David J. Ewins
Keyword(s):  
Harmonic Balance Method ◽  
Theoretical Modelling ◽  
Dynamic Force ◽  
Friction Damper ◽  
Blade Vibration ◽  
Friction Dampers ◽  
Response Characteristics ◽  
Joint Characteristics ◽  
Contact Behaviour ◽  
Better Than

Abstract This paper describes a procedure that combines the measurement of dry-friction contact behaviour, its theoretical modelling and the analysis of structures with friction joints. The experimental part describes a friction damper test rig which is specifically designed for measuring the dynamic force-response characteristics of a joint. A hybrid mathematical model, which is a combination of the traditional macro- and micro-slip models, is proposed to represent the joint characteristics and it is shown that such a model represents the measured behaviour better than any of the traditional ones. The final part of the paper demonstrates the procedure applied to a blade-damper test structure and which includes testing, analysis and correlation of both sets of results. The non-linear response levels are predicted using a dedicated program based on the Harmonic Balance Method and it is found that the proposed analysis procedure can predict the amount of response reduction, the optimum friction damper load and the locked natural frequency quite accurately.

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