Composite Wood–Concrete Structural Floor System with Horizontal Connectors

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• 作者：Ruy A. SáRibeiro ; Marilene G. SáRibeiro
• 关键词：composite ; wood–concrete ; shear connector ; composite efficiency ; rebar connector ; layered beams ; tropical hardwood ; Amazonia
• 刊名：International Journal of Concrete Structures and Materials
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：9
• 期：1
• 页码：61-67
• 全文大小：1,094 KB
• 参考文献：1. Brown, K. T. (1998). Testing of a Shear Key/Anchor in Layered Wood/Concrete Beams. M. S. Thesis, Department of Civil Engineering, Colorado State University, Ft. Collins, CO.
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  12. Faggiano, B, Marzo, A, Mazzolani, FM, Calado, LM (2009) Analysis of rectangular-shaped collar connectors for Composite timber–steel–concrete floors: Push-out tests. Journal of Civil Engineering and Management 15: pp. 47-58 CrossRef
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• 刊物主题：Building Materials; Structural Materials; Structural Mechanics; Continuum Mechanics and Mechanics of Materials;
• 出版者：Springer Netherlands
• ISSN：2234-1315

文摘

The concept of horizontal shear connection utilization on wood–concrete beams intends to be an alternative connection detail for composite wood–concrete decks. The volume of sawn-wood is over three times more expensive than concrete, in Brazil. In order to be competitive in the Brazilian market we need a composite deck with the least amount of wood and a simple and inexpensive connection detail. This research project uses medium to high density tropical hardwoods managed from the Brazilian Amazon region and construction steel rods. The beams studied are composed of a bottom layer of staggered wood boards and a top layer of concrete. The wood members are laterally nailed together to form a wide beam, and horizontal rebar connectors are installed before the concrete layer is applied on top. Two sets of wood–concrete layered beams with horizontal rebar connectors (6 and 8) were tested in third-point loading flexural bending. The initial results reveal medium composite efficiency for the beams tested. An improvement on the previously conceived connection detail (set with six connectors) for the composite wood–concrete structural floor system was achieved by the set with eight connectors. The new layout of the horizontal rebar connectors added higher composite efficiency for the beams tested. Further analysis with advanced rigorous numerical Finite Element Modeling is suggested to optimize the connection parameters. Composite wood–concrete decks can attend a large demand for pedestrian bridges, as well as residential and commercial slabs in the Brazilian Amazon.