Dynamics of a Class of Horizontal Setback Buildings with Flexible Floor Diaphragm
Publication: Journal of Structural Engineering
Volume 135, Issue 7
Abstract
This technical note presents a convenient modeling/design procedure for a class horizontal setback building to minimize the adverse effect of in-plane floor flexibility. Existence of such a class requires proportional eigenvalue problems of all the constituting frames regardless of the floor properties. For L, T, + etc. shape of buildings, the eigenvalue problem (of the frames) along two orthogonal directions need not be proportional. Moreover, the presence of a nonrectangular joint region theoretically precludes the existence of such a class. A step-by-step proportioning procedure, in the presence of a nonrectangular joint region, is outlined such that (1) “nearly” rigid floor modes exist, and (2) participation of the flexible floor modes under spatially uniform ground motion is close to zero.
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Acknowledgments
The writer gratefully acknowledges Dr. Sudhir K. Jain, Professor, IIT Kanpur, India and Dr. N. Lakshmanan, Director SERC, India for their critical review, valuable comments and constant support.
References
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Information & Authors
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Published In
Journal of Structural Engineering
Volume 135 • Issue 7 • July 2009
Pages: 873 - 877
Copyright
© 2009 ASCE.
History
Received: Jun 24, 2004
Accepted: Feb 17, 2009
Published online: Jun 15, 2009
Published in print: Jul 2009
Notes
Note. Associate Editor: Sashi K. Kunnath
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