Experimental Seismic Investigation of Appendages in Structures

Segal, D.; Hall, W.J.

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https://hdl.handle.net/2142/14170 Copy

Description

Title

Experimental Seismic Investigation of Appendages in Structures

Author(s)

• Segal, D.
• Hall, W.J.

Issue Date

1989-05

Keyword(s)

• Earthquake engineering
• Dynamic response
• Secondary systems

Abstract

In this study, the behavior of light appendages mounted in structures that respond inelastically to earthquakes was examined experimentally and analytically. 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. Good agreement ~as 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.

Publisher

University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.

Series/Report Name or Number

Civil Engineering Studies SRS-555

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/14170

Sponsor(s)/Grant Number(s)

National Science Foundation Grants CEE 82-03973 and DFR 84-19191

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