Experimental seismic investigation of appendages in structures
Segal, David
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https://hdl.handle.net/2142/20702
Description
Title
Experimental seismic investigation of appendages in structures
Author(s)
Segal, David
Issue Date
1989
Doctoral Committee Chair(s)
Hall, William J.
Department of Study
Civil and Environmental Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Language
eng
Abstract
In this study, the behavior of light appendages mounted in structures that respond inelastically to earthquakes was examined experimentally.
A simple interpretation of an elastic detuned appendage is derived. It is shown that the tuned appendage can be considered as a limiting case of the detuned appendage and that the transition can be approximated using the slightly detuned appendage.
In the case of a SDOF inelastic supporting structure, the actual structure is replaced by an equivalent linear system. In the case of a MDOF inelastic supporting structure, the concept of modal ductility is used to obtain equivalent linear modes.
A series of experiments of SDOF appendages mounted on one- and two-story structures was performed. The combined systems were subjected to earthquake motions. A good agreement was obtained between the measurements and the maximum appendages responses evaluated using the suggested procedure.
The main conclusion of this study is that the concepts of equivalent linear system and modal ductility provide a good tool for estimating the maximum response of an appendage mounted on an inelastic supporting structure. The expected accuracy is about the same for elastic and inelastic supporting structures.
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