Paper Information

Journal:   JOURNAL OF SOLID AND FLUID MECHANICS   2017 , Volume 7 , Number 1 #L0049; Page(s) 23 To 33.
 
Paper: 

IDENTIFICATION OF LRB ISOLATORS USING A MODIFIED NORMALIZED BOUC-WEN MODEL

 
 
Author(s):  BAHAR A.*, RASHIDI M.
 
* FACULTY OF ENGINEERING, UNIVERSITY OF GUILAN, RASHT, IRAN
 
Abstract: 

Due to the inherent dynamic characteristics of the restoring force of the lead- rubber bearings (LRBs), seismic behavior of the base-isolated structures are highly affected. Applying the right model based on the non-linear role of the isolator is of utmost importance. This paper presents a compound form, based on the modified normalized Bouc-Wen model, to show the LRB isolator’s behavior. This model allows to identify the LRB isolators more accurately by define its phenomenon in two linear and nonlinear phases. Based on a sinusoidal excitation with large enough amplitude, the essential parameters of the model can be realized with a unique test. The identification process and the validation of the model have been carried out using a black box model of an LRB isolator in a smart base-isolated benchmark building scheme as a virtual laboratory experiments. The results show a good level of accuracy for the identified model and make it a proper candidate for LRB isolators representation.

 
Keyword(s): LRB ISOLATOR, STEPWISE IDENTIFICATION METHOD, NORMALIZED BOUC-WEN MODEL, BENCHMARK BUILDING
 
References: 
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