International Concrete Abstracts Portal

Showing 1-5 of 12 Abstracts search results

Document: 

SP130-03

Date: 

January 1, 1992

Author(s):

G. Senkiw

Publication:

Symposium Papers

Volume:

130

Abstract:

Ninety-day load-relaxation tests at room temperature were conducted on a full range of sizes of heavy duty sleeve and lead caulking expansion anchors. The test results showed that the sleeve and lead caulking anchors on the average are able to retain only 60 and 40 percent of their initial tension load, respectively.

DOI:

10.14359/1267


Document: 

SP130-06

Date: 

January 1, 1992

Author(s):

R. Orr

Publication:

Symposium Papers

Volume:

130

Abstract:

Paper describes design examples prepared by Subcommittee 3 of ACI Committee 349 to demonstrate application of Appendix B of the code to the design of steel embedments. The committee report (Reference 1) is included in the 1990 Manual of Concrete Practice. The paper describes some of the design examples and explains key provisions of the code.

DOI:

10.14359/1270


Document: 

SP130

Date: 

January 1, 1992

Author(s):

Editors: George A. Senkiw and Harry B. Lancelot III

Publication:

Symposium Papers

Volume:

130

Abstract:

SP130 This publication presents 11 papers on the subject of anchors in concrete, design and behavior. Subject matter include design guidelines for anchorage to concrete; evaluation of expansion anchor ultimate tensile capacity prediction equations; load-relaxation tests on heavy duty sleeve and lead caulking expansion anchors; behaviors and design of ductile multiple-anchors steel-to-concrete connection; behavior design, and testing of anchors in cracked concrete; embedment design examples based on ACI 349 Appendix B; behavior of fasteners under monotonic or cyclic shear displacements; static and dynamic long-term behavior of anchors; pull-out tests on steel embedments in concrete; lateral blow-out failure of headed studs near a free edge; and testing and analysis of base plate connections.

DOI:

10.14359/14162


Document: 

SP130-09

Date: 

January 1, 1992

Author(s):

T. Balough, G. Kovacshazy and A. Frigey

Publication:

Symposium Papers

Volume:

130

Abstract:

Sixty-six pullout tests were conducted on cast-in-place concrete anchors consisting of a threaded rod with a washer and two nuts, nonsymmetrical deformed anchors, and formed anchor heads. The purpose of the test program was to compare the behavior of these three anchors and to check the reliability of the ACI 349-85 standard calculation method. All the anchors were cast in 300 x 300 x 150 mm unreinforced concrete blocks. The test variables were concrete strength, embedment depth and edge distance. The test results showed that if the failure mode is a concrete shear cone failure, the values calculated using the ACI 349-85 standard calculation method, without a strength reduction factor, will provide a good prediction. If splitting or pullout failure occurs, the pullout force will be 25 percent lower. The effect of anchorage depth is overestimated by the ACI 349-85 standard model. A strength reduction factor = 0.50 is proposed to achieve a 95 percent probability that failure loads for steel embedment will exceed the ACI 349-85 theoretical value. Formed anchor heads are recommended as a standard.

DOI:

10.14359/1275


Document: 

SP130-02

Date: 

January 1, 1992

Author(s):

R. Walther, C. Sutton, and D. Meinheit

Publication:

Symposium Papers

Volume:

130

Abstract:

Nine equations that predict ultimate tensile capacity for expansion anchor installations failing by formation of a concrete cone are reviewed. The equations predict the tensile capacity for anchors installed in unreinforced, uncracked concrete; group and edge effects are not considered. A data base consisting of the results from 927 tests was used to evaluate the accuracy of the prediction equations. Multiple regression statistics were utilized to ascertain how individual variables affected prediction accuracy. For shallow embedments, all nine equations yield satisfactory or conservative predictions. For deeper embedments, predicted capacity is less conservative. In general, empirical equations developed by curve-fitting experimental data are more accurate than semi-empirical models.

DOI:

10.14359/1266


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