Title: Shear transfer in lightweight reinforced concrete
Date: January-February, 1976
Volume: 21
Issue: 1
Page number: 20-39
Author(s): Alan H. Mattock, W. K. Li, T. C. Wang
https://doi.org/10.15554/pcij.01011976.20.39
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Abstract
A study is reported of the single direction shear transfer strength of lightweight aggregate concrete. Push-off tests were carried out on specimens made from sanded lightweight concrete, two types of all-lightweight concrete, and sand and gravel concrete. Both initially uncracked specimens and specimens cracked in the shear plane before being subjected to shear, were tested. It was found that the shear transfer strength of lightweight concrete is less than that of sand and gravel concrete having the same compressive strength. The shear-friction provisions of Section 11.15 of ACI 318- 71 may be used in the design of connections in lightweight concrete providing the value of the coefficients of friction fc, contained in Section 11.15.4, are multiplied by the following factors: (a) For all-lightweight concrete having a unit weight not less than 92 lb per cu ft, multiply μ by 0.75. (b) For sanded lightweight concrete having a unit weight not less than 105 lb per cu ft, multiply μ by 0.85.
References
1. ACI Committee 318, "Building Code Requirements for Reinforced Concrete (ACI 318-71)," American Concrete Institute, Detroit, 1971.
2. PCI Design Handbook, Prestressed Concrete Institute, 1971.
3. Mast, R. F., "Auxiliary Reinforcement in Concrete Connections," Journal of the Structural Division, American Society of Civil Engineers, V. 94, ST 6, June 1968, pp. 1485- 1504.
4. Mattock, A. H., "Effect of Aggregate Type on Single Direction Shear Transfer Strength in Monolithic Concrete," Report SM74-2, Department of Civil Engineering, University of Washington, Seattle, Washington, August 1974.
5. Mattock, A. H., and Hawkins, N. M., "Research on Shear Transfer in Reinforced Concrete," PCI JOURNAL, V. 17, No. 2, March-April, 1972, pp. 55-75.
6. Mattock, A. H., "Shear Transfer in Concrete Having Reinforcement at an Angle to the Shear Plane," Publication SP-42, Shear in Reinforced Concrete, American Concrete Institute,1974, pp. 17-42.