Experimental and Numerical Investigation of Steel-Concrete Composite Waffle Slab Behavior
Publication: Journal of Structural Engineering
Volume 141, Issue 11
Abstract
This paper proposes a new kind of composite waffle slab that consists of orthogonal steel girders and flat RC slab. The steel beams help decrease the cracking that occurs with concrete, and using prefabricated RC slabs reduces the framework and speeds up the construction. An experimental investigation of steel-concrete composite waffle slabs is conducted, and the specimens are proved to have excellent ductility and load-bearing capacity. Then a mixed finite-element (FE) model combining the beam elements and shell elements is proposed to predict the behavior of composite waffle slab. Based on the numerical model, a series of parameter analyses are conducted, and the influences of different parameters on the mechanical behavior of the composite waffle slab are intensively investigated. Simplified formulas for the ultimate capacity of the composite waffle slab are derived based on the test observations and numerical analysis. Reasonable recommendations are proposed to help engineers design the composite waffle slab effectively.
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Acknowledgments
The authors express their sincere gratitude for the financial support provided by the National Natural Science Foundation of China (Grant No. 90815006) and Twelfth Five-Year Plan major projects supported by National Science and Technology Grant No. 2011BAJ09B01.
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© 2015 American Society of Civil Engineers.
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Received: May 21, 2014
Accepted: Jan 6, 2015
Published online: Feb 17, 2015
Discussion open until: Jul 17, 2015
Published in print: Nov 1, 2015
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