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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 14 Abstracts search results
Document:
CI4401Mota
Date:
January 1, 2022
Author(s):
Mike Mota, Michael W. Hopper, Michael A. Russillo, and Ramon Gilsanz
Publication:
Concrete International
Volume:
44
Issue:
1
Abstract:
The article discusses technologies that allow flat-plate floor systems to economically achieve spans in the 45 to 50 ft (13.7 to 15.2 m) range. These technologies include using ASTM A615/A615M Grade 80 steel, concrete mixtures with design strengths of 8000 psi (55 MPa) and higher, voided slab formers, and post-tensioned slabs with tendons banded over the columns in both directions.
SP-350_12
November 1, 2021
Iman Mansouri, Chang-Hwan Lee, and Paul O. Awoyera
Symposium Papers
350
TUBEDECK, a one-way spanning voided composite slab, has been utilized in the construction field over the years to enhance the efficiency, constructability, and environmental performance of structures. TUBEDECK incorporates both cast-in-situ reinforced concrete slabs and profiled steel decks. However, there is a need to clarify the shear resistance capacity in this slab because the shear strength of the member reduces as concrete volume is eliminated to optimize flexural strength. Therefore, this study applied the artificial neural network (ANN) technique to determine the shear strength of TUBEDECK. By varying factors in the ANN features, several ANN models were developed. Out of many models developed, an optimal model was selected, having a maximum/mean relative errors of 5.1% in a dataset.
DOI:
10.14359/51734319
SP321-03
September 29, 2017
Dario Coronelli, Francesco Foti, Luca Martinelli, and Elisa Barbarelli
321
The paper reports tests to investigate shear and punching behavior of voided slabs, part of a research aimed at studying the structural response of such systems. The voids are shaped like a truncated pyramid. The program included a series of twelve slabs, divided into four groups according to the transverse steel arrangement. The slabs were loaded by one or two forces and supported on two sides. This loading scheme was chosen to investigate the load transfer and resistant mechanism in the slab with voids, with the aim of studying the shear transfer at a column. Failures under point loads close to the support correspond to those typical in thick slabs. A combination of two failure modes occurred, with punching and diagonal shear tension. The capacity must be predicted using the concrete cross section reduced by the voids.
10.14359/51701190
SP321-12
David A. Fanella, Mustafa Mahamid, and Michael Mota
Voided concrete flat plate slab systems, which have been used for many years in Europe and other parts of the world, are becoming increasingly popular in the U.S. because of many inherent benefits. This paper presents information on these benefits as well as requirements for serviceability, flexure, and shear. Also included are discussions on vibration and fire resistance.
10.14359/51701202
CI3807Q&A
July 1, 2016
Scott M. Tarr
38
7
As a designer of industrial concrete floors, I’ve always placed a priority on reducing the potential for slab cracking. One of the approaches I have used is to minimize restraint to drying shrinkage by lowering friction on the underside of the slab. For example, I might specify a layer of sand on top of a crushed stone base to choke off the surface of the stone and create a smooth interface between the base and slab. Recently, however, some contractors and owners have expressed concerns regarding “dominant joints.” What are dominant joints and how can they be avoided?
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The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.