NEHRP Clearinghouse
- Title
- Experimental Seismic Investigation of Appendages in Structures.
- File
- PB89197040.pdf
- Author(s)
- Segal, D.; Hall, W. J.
- Source
- National Science Foundation, Washington, DC., May 1989, 280 p.
- Identifying Number(s)
- ['UILU-ENG-89-2002', 'STRUCTURAL RESEARCH SER-545']
- Abstract
- In the 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 main conclusion of the 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.
- Keywords
- Lighting equipment; Earthquake resistant structures; Seismic effect; Vibration; Dynamic response; Ground motion; Earthquake engineering; Stresses; Elastic properties; Ductility; Earthquakes