Test of Four‐Panel Post‐Tensioned Flat Plate
Publication: Journal of Structural Engineering
Volume 111, Issue 9
Abstract
A load test of a prestressed concrete, one‐half scale model, flat plate with unbonded tendons is reported. The four panel model was 20 ft (6.1 m) square, 2.75 in. (70 mm) thick, with 8 in. (200 mm) or 7 in. (175 mm) square columns spaced at 10 ft (3 m) centers. A uniform tendon arrangement was used in one slab direction and a banded arrangement was employed in the other direction. Bonded reinforcement was provided in accordance with ACI Code (318‐77) provisions. In addition, deformed bars were used as slab stirrups at several column connections. Bonded reinforcement effectively controlled cracking. The measured tendon stress at ultimate was 10–16% lower than the ultimate stress predicted by the ACI Code (318‐77) equation. Yield‐line analysis results showed good agreement with measured strength. The banded tendon layout successfully supported a load greater than the design ultimate load. Although slab stirrups were ineffective, the shear strength of each slab‐column connection tested exceeded the ultimate strength predicted by the ACI Code. Use of the ACI Code equivalent frame method of analysis was supported for design.
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References
1.
Bollinger, W. M., “Flexural Strength of a Post‐Tensioned Slab with Unbonded Tendons,” thesis presented to the University of Texas, at Austin, Tex., in 1977, in partial fulfillment of the requirements for the degree of Master of Science.
2.
Brotchie, J. R., and Beresford, F. D., “Experimental Study of a Prestressed Concrete Flat Plat Structure,” Paper No. 2298, Division of Building Research, Commonwealth Scientific and Industrial Research Organization, Melbourne, Australia, 1964.
3.
“Building Code Requirements for Reinforced Concrete,” ACI 318‐71 and ACI 318‐77, American Concrete Institute, Detroit, Mich., 1971 and 1977.
4.
Burns, N. H., and Hemakom, R., “Test of Scale Model Post‐Tensioned Flat Plate,” Journal of the Structural Division, ASCE, Vol. 103, No. ST6, Proc. Paper 13003, June, 1977, pp. 1237–1255.
5.
Burns, N. H., and Hemakom, R., “Test of Post‐Tensioned Flat Plate with Banded Tendon,” Journal of the Structural Division, ASCE, Vol. 111, No. 9, Sept., 1985.
6.
Gamble, W. L., “An Experimental Investigation of the Strength and Behavior of a Prestressed Concrete Flat Plate,” Report T8, 0–9, Division of Building Research, Commonwealth Scientific and Industrial Research Organization, Melbourne, Australia, 1964.
7.
Gerber, L. L., and Burns, N. H., “Ultimate Strength Tests of Post‐Tensioned Concrete Flat Plates,” American Concrete Institute Journal, Vol. 71, No. 2, Feb., 1974, pp. 61–71.
8.
Grow, J. W., and Vanderbilt, M. D., “A Study of the Shear Strength of Lightweight Prestressed Concrete Flat Plates,” Prestressed Concrete Institute Journal, Vol. 12, No. 4, Aug., 1967, pp. 18–28.
9.
Hawkins, N. M., “Shear Problems in Slabs,” Limit Design of Slabs, Code Considerations, ASCE Preprint 2502, 1975.
10.
Hawkins, N. M., and Trongtham, N., “Moment Transfer Between Unbonded Post‐Tensioned Prestressed Concrete Slabs and Columns,” Report to the Post‐Tensioning Institute and the Reinforced Concrete Council on Project No. 39, The University of Washington, Nov., 1976.
11.
Hemakom, R., “Strength and Behavior of Post‐Tensioned Flat Plates with Unbonded Tendons,” thesis presented to The University of Texas, at Austin, Texas, in 1975, in partial filfillment of the requirements for the degree of Doctor of Philosophy.
12.
Kosut, G. M., “Shear Strength of a Post‐Tensioned Flat Plate at the Column Connections,” thesis presented to the University of Texas, at Austin, Texas, in 1977, in partial fulfillment of the requirements for the degree of Master of Science.
13.
Lin, T. Y., Scordelis, A. C., and Itaya, R., “Behavior of a Continuous Concrete Slab Prestressed in Two Directions,” Institute of Engineering Research, University of California, Berkeley, Calif., Aug., 1958;
also in American Concrete Institute Journal, Dec., 1959.
14.
Lu, F., “Strength and Behavior of a Nine‐Bay Continuous Concrete Slab Prestressed in Two Directions,” University of Canterbury, Christchurch, New Zealand, Mar., 1966.
15.
Scordelis, A. C., Lin, T. Y., and May, H. R., “Shearing Strength of Prestressed Lift Slabs,” American Concrete Institute Journal, Vol. 55, No. 4, Oct., 1958, pp. 485–506.
16.
Smith, S. W., and Burns, N. H., “Post‐Tensioned Flat Plate to Column Connection Behavior,” Prestressed Concrete Institute Journal, Vol. 19, No. 3, May–June, 1974, pp. 74–91.
17.
“Tentative Recommendations for Prestressed Concrete Flat Plates,” American Concrete Institute‐ASCE Joint Committee 423 on Prestressed Concrete, American Concrete Institute Journal, Vol. 71, No. 2, Feb., 1974.
18.
Winter, C. V., “Flexural Behavior of a Post‐Tensioned Flat Plate with Unbonded Tendons,” thesis presented to the University of Texas, at Austin, Tex., in 1978, in partial fulfillment of the requirements for the degree of Master of Science.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 111 • Issue 9 • September 1985
Pages: 1916 - 1929
Copyright
Copyright © 1985 ASCE.
History
Published online: Sep 1, 1985
Published in print: Sep 1985
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