Sustained Load Performance of Adhesive Anchor Systems in Concrete

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Title: Sustained Load Performance of Adhesive Anchor Systems in Concrete

Author(s): Todd M. Davis and Ronald A. Cook

Publication: Structural Journal

Volume: 114

Issue: 4

Appears on pages(s): 951-957

Keywords: adhesive anchors; anchorage; sustained load; time to failure

DOI: 10.14359/51689723

Date: 7/1/2017

Abstract:
This research project investigated the sustained load performance of adhesive anchors in concrete under different installation and in-service conditions. Based on the results of the literature review and the experience of the research group, a triage was conducted on many parameters identified as possibly affecting the sustained load performance of adhesive anchors, and the highest-priority parameters were investigated in this project. A stress versus time-to-failure approach was used to evaluate sensitivity of three ICC-ES AC308 approved adhesive anchor systems. Of the various parameters investigated, only elevated in-service temperature and manufacturer’s cure time were shown to exhibit adverse effects on sustained loads more than that predicted by short-term tests of fully cured adhesives.

Related References:

1. Cook, R. A.; Kunz, J.; Fuchs, W.; and Konz, R. C., “Behavior and Design of Single Adhesive Anchors Under Tensile Load in Uncracked Concrete,” ACI Structural Journal, V. 95, No. 1, Jan.-Feb. 1998, pp. 9-26.

2. Eligehausen, R.; Cook, R. A.; and Appl, J., “Behavior and Design of Adhesive Bonded Anchors,” ACI Structural Journal, V. 103, No. 6, Nov.-Dec. 2006, pp. 822-831.

3. NCHRP, “NCHRP Report 757: Long-Term Performance of Epoxy Adhesive Anchor Systems,” Transportation Research Board of the National Academies, Washington, DC, 2013.

4. Cook, R. A.; Doer, G. T.; and Klingner, R. E., “Bond Stress Model for Design of Adhesive Anchors,” ACI Structural Journal, V. 90, No. 5, Sept.-Oct. 1993, pp. 514-524.

5. McVay, M.; Cook, R. A.; and Krishnamurthy, K., “Pullout Simulation of Post-installed Chemically Bonded Anchors,” Journal of Structural Engineering, ASCE, V. 122, No. 9, 1996, pp. 1016-1024. doi: 10.1061/(ASCE)0733-9445(1996)122:9(1016)

6. Cook, R. A., and Konz, R. C., “Factors Influencing Bond Strength of Adhesive Anchors,” ACI Structural Journal, V. 98, No. 1, Jan.-Feb. 2001, pp. 76-86.

7. Davis, T. M., “Sustained Load Performance of Adhesive Anchor Systems in Concrete,” PhD dissertation, University of Florida, Gainesville, FL, 2012.

8. ICC-ES AC308, “Acceptance Criteria for Post Installed Adhesive Anchors in Concrete,” ICC Evaluation Services, Inc., Whittier, CA, 2008.

9. ASTM A354-11, “Standard Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other Externally Threaded Fasteners,” ASTM International, West Conshohocken, PA, 2011, 7 pp.

10. AASHTO, “Standard Method of Test for Evaluation of Adhesive Anchors in Concrete under Sustained Loading Conditions (TP 84-10),” American Association of State Highway Officials, Washington, DC, 2010, 19 pp.

11. ASTM E488-96(2003), “Standard Test Methods for Strength of Anchors in Concrete and Masonry Elements, ASTM International, West Conshohocken, PA, 2003, 8 pp.

12. ACI Committee 355, “Qualification of Post-Installed Adhesive Anchors (ACI 355.4-11),” American Concrete Institute, Farmington Hills, MI, 2011, 55 pp.

13. ASTM D638-08, “Standard Test Method for Tensile Properties of Plastics,” ASTM International, West Conshohocken, PA, 2008, 16 pp.

14. ASTM D2990-01, “Standard Test Methods for Tensile, Compressive, and Flexural Creep and Creep-Rupture of Plastics,” ASTM International, West Conshohocken, PA, 2001, 20 pp.

15. NCHRP, “NCHRP Report 639: Adhesive Anchors in Concrete Under Sustained Loading Conditions,” Transportation Research Board of the National Academies, Washington DC, 2009

16. Dusel, J. P., and Mir, A. A., “Initial Evaluation of Epoxy Cartridges used for Anchoring Dowels into Hardened Concrete,” Minor Research Report F91TL01, California Department of Transportation, Sacramento, CA, 1991.


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