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03.26: Experimental assessment of friction dampers under impact loading
Author(s) -
Santos Ana Francisca,
Santiago Aldina,
da Silva Luís Simões,
Latour Massimo,
Rizzano Gianvittorio
Publication year - 2017
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.110
Subject(s) - damper , structural engineering , ductility (earth science) , impact resistance , materials science , joint (building) , actuator , dissipative system , tension (geology) , quasistatic process , engineering , composite material , creep , ultimate tensile strength , physics , electrical engineering , quantum mechanics
In order to enhance the knowledge of the behaviour of steel joints under accidental loading conditions, within the European research project FREEDAM, the behaviour of an innovative beam‐to‐column connection, in particular the dissipative component (friction damper) of the joint under tension, has been studied under impact and quasi‐static conditions. This experimental campaign comprises a total of 6 quasi‐static tests and 35 impact tests on friction pads, that includes three different friction materials, two different plate thicknesses (10mm and 30mm) and two different bolt classes (class 8.8SB or 10.9HR). The impact tests were performed using an experimental layout capable of apply high loading rates by a pneumatic actuator, totally developed and tailored at the University of Coimbra. The results of impact tests compared with the quasi‐static tests show: i) an increase in the component resistance when subjected to impact loads, ii) a reduction in the ductility of the component.