Shallow Flat Soffit Precast Concrete Floor System
Publication: Practice Periodical on Structural Design and Construction
Volume 18, Issue 2
Abstract
It is a key economic criterion for multistory residential and office buildings to have a shallow floor that minimizes floor height and saves in the cost of architectural, mechanical, and electrical systems. This paper presents the development of a new precast concrete floor system that eliminates the need for column corbels and beam ledges while being shallow. The proposed system can achieve a span-to-depth ratio of 30 and flat soffit while being consistent with prevailing erection techniques. The proposed system consists of continuous precast columns, prestressed rectangular beams, hollow-core (HC) planks, and cast-in-place composite topping. The paper presents the construction sequence of the new system and focuses on testing HC-beam connections without ledges in a full-scale specimen. Testing results indicate that a 30-cm-deep flat soffit precast floor system has adequate capacity to carry gravity loads (including 488 kg/m2 live load) in a bay size. Also, testing shows that shear capacity of the proposed HC-beam connections without ledges can be accurately predicted using the shear friction theory.
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Acknowledgments
The writers wish to acknowledge EnCon, Denver, CO and Concrete Industries Inc., Lincoln, NE, for specimen donations.
References
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Information & Authors
Information
Published In
Practice Periodical on Structural Design and Construction
Volume 18 • Issue 2 • May 2013
Pages: 101 - 110
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 28, 2011
Accepted: Jul 20, 2012
Published online: Jul 27, 2012
Published in print: May 1, 2013
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