Title: Examination of the effective coefficient of friction for shear friction design
Date Published: November-December 2016
Volume: 61
Issue: 6
Page Numbers: 44-67
Authors: Kristian Krc, Samantha Wermager, Lesley H. Sneed, and Donald Meinheit
https://doi.org/10.15554/pcij61.6-01

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Abstract

Since the introduction of the effective coefficient of friction µe approach to the PCI Design Handbook: Precast and Prestressed Concrete, several studies have provided additional test results that can be used to compare and validate the shear friction design provisions. This paper presents a database of shear friction test results collected from the literature that was analyzed for the effective coefficient of friction approach used in the PCI Design Handbook (Eq. [5-32b]), and the coefficient of friction approach used in the PCI Design Handbook (Eq. [5-32a]) and the ACI Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14) (Eq. [22.9.4.2]). The database was limited to push-off specimens subjected to monotonic loading and without external normal forces. The data were categorized in terms of concrete type, interface condition, compressive strength of concrete, clamping stress, and area of shear interface to help identify gaps in the literature. Analysis of the database showed that PCI Eq. (5-32b) is more accurate and has a lower standard deviation than both PCI Eq. (5-32a) and ACI 318-14 Eq. (22.9.4.2) for normalweight, sand-lightweight, and all-lightweight concrete with monolithic uncracked, monolithic precracked, and cold-joint roughened interface conditions. For the cold-joint smooth interface condition, the authors recommend removing the modification factor λ in the coefficient of friction µ to provide more accurate and economical designs.

References

PCI Industry Handbook Committee. 2010. PCI Design Handbook: Precast and Prestressed Concrete. MNL-120. 7th ed. Chicago, IL: PCI.

PCI Industry Handbook Committee. 1978. PCI Design Handbook: Precast and Prestressed Concrete. MNL-120. 2nd ed. Chicago, IL: PCI.

Mattock, A. H. 2001. “Shear Friction and High-Strength Concrete.” ACI Structural Journal 98 (1): 50–59.

Shaikh, F. A. 1978. “Proposed Revisions to Shear-Friction Provisions.” PCI Journal 23 (2): 12–21.

Mast, R. F. 1968. “Auxiliary Reinforcement in Concrete Connections.” ASCE Journal of the Structural Division Proceedings 94 (ST6): 1485–1504.

ACI (American Concrete Institute) Committee 318. 2014. Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary. Farmington Hills, MI: ACI.

Mattock, A. H. 1974. “Shear Transfer in Concrete Having Reinforcement at an Angle to the Shear Plane.” In ACI Special Publication SP-42, 17–42. Farmington Hills, MI: ACI.

Birkeland, H. W. 1968. “Precast and Prestressed Concrete.” Lecture, University of British Columbia, Vancouver, Canada.

Raths, C. H. 1977. “Design Proposals for Reinforced Concrete Corbels by Alan H. Mattock,” Reader Comments. PCI Journal 22 (2): 93–98.

AASHTO (American Association of State Highway and Transportation Officials). 2014. AASHTO LRFD Bridge Design Specifications. 7th ed. Washington, DC: AASHTO.

Tanner, J. A. 2008. “Calculating Shear Friction Using Effective Coefficient of Friction.” PCI Journal 53 (3): 114–20.

Hofbeck, J. A., I. O. Ibrahim, and A. H. Mattock. 1969. “Shear Transfer in Reinforced Concrete.” ACI Journal Proceedings 66 (2): 119–128.

Mattock, A. H., and N. M. Hawkins. 1972. “Shear Transfer in Reinforced Concrete—Recent Research.” PCI Journal 17 (2): 55–75.

Mattock, A. H. 1976. Shear Transfer under Monotonic Loading across an Interface between Concretes Cast at Different Times. Department of Civil Engineering report SM 76-3. Seattle, WA: University of Washington.

Mattock, A. H., W. K. Li, and T. C. Wang. 1976. “Shear Transfer in Lightweight Reinforced Concrete.” PCI Journal 21 (1): 20–39.

Kahn, L. F., and A. D. Mitchell. 2002. “Shear Friction Tests with High-Strength Concrete.” ACI Structural Journal 99 (1): 98–103.

Shaw, D., and L. H. Sneed. 2014. “Interface Shear Transfer of Lightweight-Aggregate Concretes Cast at Different Times.” PCI Journal 59 (3): 130–144.

Sneed, L. H., K. Krc, S. Wermager, and D. Meinheit. 2016. “Interface Shear Transfer of Lightweight-Aggregate Concretes.” PCI Journal 61 (2): 38–55.

Harries, K. A., G. Zeno, and B. Shahrooz. 2012. “Toward an Improved Understanding of Shear-Friction Behavior.” ACI Structural Journal 109 (6): 835–844.

Hoff, G. C. 1993. “High Strength Lightweight Aggregate Concrete for Arctic Applications—Part 3: Structural Parameters.” In ACI Special Publication SP-136, 175–246. Farmington Hills, MI: ACI.

Mansur, M. A., T. Vinayagam, and K. H. Tan. 2008. “Shear Transfer across a Crack in Reinforced High-Strength Concrete.” Journal of Materials in Civil Engineering 20 (4): 294–302.

Walraven, J. C., and H. W. Reinhardt. 1981. “Theory and Experiments on the Mechanical Behaviour of Cracks in Plain and Reinforced Concrete Subjected to Shear Loading.” HERON 26 (1A): 1–68.

Papanicolaou, C. G., and T. C. Triantafillou. 2002. “Shear Transfer Capacity along Pumice Aggregate Concrete and High-Performance Concrete Interfaces.” Materials and Structures 35 (4): 237–245.

Echegaray-Oviedo, J., E. Cuenca, J. Navarro-Gregori, and P. Serna. 2014. “Influence of the Fiber Reinforcement in Concrete under Direct Shear.” In 10th fib International PhD Symposium in Civil Engineering Proceedings, 415–424. Quebec City, QC, Canada: Université Laval.

Vangsirirungruang, K. 1971. “Effect of Normal Compressive Stresses on Shear Transfer in Reinforced Concrete.” MS thesis, University of Washington, Seattle.

Dulacska, H. 1972. “Dowel Action of Reinforcement Crossing Cracks in Concrete.” ACI Journal Proceedings 69 (12): 754–757.

Hawkins, N. M., and D. A. Kuchma. 2007. “Application of LFRD Bridge Design Specifications to High-Strength Structural Concrete: Shear Provisions.” National Cooperative Highway Research Program report 579.

Chatterjee, P. 1971. “Shear Transfer in Reinforced Concrete.” MS thesis, University of Washington, Seattle.

Mattock, A. H., L. Johal, and H. C. Chow. 1975. “Shear Transfer in Reinforced Concrete with Moment or Tension Acting across the Shear Plane.” PCI Journal 20 (4): 76–93.

Bass, R. A., R. L. Carrasquillo, and J. O. Jirsa. 1989. “Shear Transfer across New and Existing Concrete Interfaces.” ACI Structural Journal 86 (4): 383–393.

Valluvan, R., M. E. Kreger, and J. O. Jirsa. 1999. “Evaluation of ACI 318-95 Shear-Friction Provisions.” ACI Structural Journal 96 (4): 473–481.

Saemann, J. C., and G. W. Washa. 1964. “Horizontal Shear Connections between Precast Beams and Cast-in-Place.” ACI Journal Proceedings 61 (11): 1383–1410.

Ivey, D. L., and E. Buth. 1967. “Shear Capacity of Lightweight Concrete Beams.” ACI Journal 64 (10): 634–643.

Loov, R. E., and A. K. Patnaik, 1994. “Horizontal Shear Strength of Composite Concrete Beams with a Rough Interface.” PCI Journal 39 (1): 48–69.

Gohnert, M. 2000. “Proposed Theory to Determine the Horizontal Shear Between Composite Precast and In Situ Concrete.” Cement and Concrete Composites 22 (6): 469–476.

Gohnert, M. 2003. “Horizontal Shear Transfer across a Roughened Surface.” Cement and Concrete Composites 25 (3): 379–385.

Hanson, N. W. 1960. Precast-Prestressed Concrete Bridges: 2. Horizontal Shear Connections. Bulletin D

Skokie, IL: Portland Cement Association, Research and Development Laboratories.

Paulay, T., R. Park, and M. H. Phillips. 1974. “Horizontal Construction Joints in Cast-in-Place Reinforced Concrete.” In ACI Special Publication SP-42, 599–616. Farmington Hills, MI: ACI.

Frénay, J. W. 1985. “Shear Transfer across a Single Crack in Reinforced Concrete under Sustained Loading. Part I: Experiments.” Internal report. Delft University of Technology, Faculty of Civil Engineering and Geosciences, Netherlands.