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Numerical analysis method for evaluating response modification factor for steel structures equipped with friction dampers

Numerical analysis method for evaluating response modification factor for steel structures... The structural response modification factor (R) is a parameter, which determines the performance of a structure in a nonlinear range during strong earthquakes. Hence, in the previous research, the effect of viscose dampers on the coefficient of structural modification has been measured. In this research, the effect of friction dampers on the R factor in steel structures with regard to traditional and advanced methods of nonlinear static analysis has been investigated. With the development of the application of pushover analysis, in recent years, several advanced pushover methods have been proposed to consider the realistic behaviors of structures, including the effect of higher modes or the effect of changes in the structural modal characteristics during the analysis owing to the yielding of members. Therefore, the adaptive pushover analysis was used to consider the impact of near- and far-field records. In general, the factors affecting the R factor are distinguishable from the following two perspectives: strength and ductility. Structural analysis has been carried out by the finite element method and by taking into account the nonlinear method of the members in an extended fiber section method, with and without frictional damper in different places and positions. The results show that in particular the R factor has increased 52.45% on average, under different conditions. Therefore, using the results of numerous cases and the application of dampers with different slip loads and the variable number of dampers in each story, a new equation (Rd) is proposed for the R factor of structures along with a friction damper (slip force, number of story, and bay of equipped with damper). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Asian Journal of Civil Engineering" Springer Journals

Numerical analysis method for evaluating response modification factor for steel structures equipped with friction dampers

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Publisher
Springer Journals
Copyright
Copyright © Springer Nature Switzerland AG 2020
ISSN
1563-0854
eISSN
2522-011X
DOI
10.1007/s42107-020-00315-2
Publisher site
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Abstract

The structural response modification factor (R) is a parameter, which determines the performance of a structure in a nonlinear range during strong earthquakes. Hence, in the previous research, the effect of viscose dampers on the coefficient of structural modification has been measured. In this research, the effect of friction dampers on the R factor in steel structures with regard to traditional and advanced methods of nonlinear static analysis has been investigated. With the development of the application of pushover analysis, in recent years, several advanced pushover methods have been proposed to consider the realistic behaviors of structures, including the effect of higher modes or the effect of changes in the structural modal characteristics during the analysis owing to the yielding of members. Therefore, the adaptive pushover analysis was used to consider the impact of near- and far-field records. In general, the factors affecting the R factor are distinguishable from the following two perspectives: strength and ductility. Structural analysis has been carried out by the finite element method and by taking into account the nonlinear method of the members in an extended fiber section method, with and without frictional damper in different places and positions. The results show that in particular the R factor has increased 52.45% on average, under different conditions. Therefore, using the results of numerous cases and the application of dampers with different slip loads and the variable number of dampers in each story, a new equation (Rd) is proposed for the R factor of structures along with a friction damper (slip force, number of story, and bay of equipped with damper).

Journal

"Asian Journal of Civil Engineering" – Springer Journals

Published: Nov 11, 2020

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