Seismic Design Forces for Rigid Floor Diaphragms in Precast Concrete Building Structures
Publication: Journal of Structural Engineering
Volume 133, Issue 11
Abstract
Floor accelerations are needed to evaluate in-plane diaphragm forces in earthquake resistant design of buildings, and for the design of their connections. Recorded floor accelerations in buildings during some past earthquakes have shown acceleration magnifications that are not properly considered by current building codes. Earthquake damage in some precast buildings seems to point out significant deficiencies in the design of precast diaphragms. Two deficiencies stand out: the magnitude of the design forces and the lack of suitable design methods. This paper describes an experimental validation of a previously proposed analytical-based procedure for the evaluation of earthquake-induced floor horizontal accelerations in regular buildings built with rigid diaphragms. Horizontal floor accelerations recorded from shake table tests of four small-scale structures representing frame and frame-wall multistory reinforced concrete buildings were collected. These buildings were tested on the University of Illinois Urbana-Champaign shaking table during the 1979–1989 period. The horizontal floor accelerations obtained from the tests are compared in this paper with results from four predictive approaches.
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Acknowledgments
The financial support of CONACYT, Contract Nos. UNSPECIFIED1085 PA and NSFNSF-2004-C01-4/A-1, are gratefully acknowledged. Thanks are due to Professor M. Aschheim, from Santa Clara University, formerly at the University of Illinois at Urbana-Champaign, for his assistance in collecting the information and reports from this University needed for this research. Thanks are also due to Mr. R. Sanchez, Ph. D. candidate from the National University of Mexico who helped with several analyses. Three reviewers made useful suggestions that helped to improve the manuscript. Their reviews and time are greatly appreciated.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 11 • November 2007
Pages: 1604 - 1615
Copyright
© 2007 ASCE.
History
Received: Feb 15, 2006
Accepted: Jan 17, 2007
Published online: Nov 1, 2007
Published in print: Nov 2007
Notes
Note. Associate Editor: Yahya C. Kurama
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