Ostovari-Dailamani, Shadi and Croll, James G. A. (2009) Effect of pre-loading on response of cylindrical roof shells under earthquake loading. In: 9th Asia Pacific Conference on Shell and Spatial Structures (APCS) 2009, 27-29 May 2009, Nagoya Congress Center, Nagoya, Japan. (Unpublished)

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Abstract

Of the limited past investigations of how thin shell roofs respond to earthquakes, attention has been largely restricted to linear analysis, with contributions from pre-loading usually neglected. The present paper first analyses the effects of pre-loading on the natural vibration spectra using a newly developed analytical method. Results of this investigation indicate that inclusion of self weight and additional superimposed loading can significantly reduce the predicted natural frequencies. Parameter studies illustrate the importance of the inclusion of pre-loading on the maximum isplacement and stress responses, of a set of cylindrical roof shells having different geometries, when subject to the vertical motions of a typical earthquake. Inclusion of pre-loading is shown to have possibly major influences on the levels of deformations and the associated membrane and bending stresses. It is concluded that performing a modal analysis in which the effects of pre-loading are ignored could lead to serious underestimation of responses for large roof shells subject to earthquake loading.

Item Type:	Conference or Conference Paper (Paper)
Additional Information:	Paper presented at the 9th Asia Pacific Conference on Shell and Spatial Structures (APCS) 2009, held on 27-29 May 2009 at the Nagoya Congress Center, Nagoya, Japan. Paper Reference: APCS09-P0031
Uncontrolled Keywords:	cylindrical roof shells, roofs, earthquakes,
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Pre-2014 Departments:	School of Engineering
Related URLs:	Organisation Organisation Organisation Organisation
Last Modified:	08 Oct 2019 09:30
URI:	http://gala.gre.ac.uk/id/eprint/6520

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