Effect of Uniform Vertical and Longitudinal Dowel Misalignment in Jointed Plain Concrete Pavement
Tóm tắt
With the development in construction technology, dowel bars insertion in the joint plain concrete pavement (JPCP) is practiced using dowel bar inserters (DBI). Although DBI, can reduce the probability of the single dowel bar misalignment, wrong construction practices, gap graded concrete mixtures, inappropriate calibration of DBI may result in the complete assembly of dowel bars being misaligned. Most previous studies investigated the effect of single dowel misalignment, which may not describe the stress-state when entire dowel bars assembly is misaligned. Further, experimental investigations may be expensive to investigate the effect of dowel bars misalignment. In this direction, to understand the impact of uniform misalignment of dowel bars assembly, a 3D finite element model was developed considering vertical and longitudinal translation type of misalignments. The model results indicated that the vertical translation misalignment results in excessive tensile stresses in the concrete at the joint. This may lead to tensile fatigue failure resulting in dowel looseness. Further, the longitudinal translation resulted in higher compressive stresses, which may result in the crushing of the concrete due to repeated application of wheel loads. Both the cases of misalignment resulted in lower load transfer efficiency than no-misalignment cases. The study found that critical stresses in the concrete at the joint are a function of the type of dowel misalignment.
Tài liệu tham khảo
Hoegh, K., & Khazanovich, L. (2009). Guidelines for dowel alignment in concrete pavements, Project No. 10–69, NCHRP
Tayabji, S. D. (1986). Dowel placement tolerances for concrete pavements, Journal of Transportation Research Record, Transportation Research Board, Paper No. 1062.
ACPA Guide Specification. (2013). Dowel bar alignment and location for placement of mechanical dowel bar insertion, pp.1–12
Buch, N., Varma, A. H., & Prabhu, M. I. (2007). A laboratory evaluation of alignment tolerances for dowel bars and their effect on joint opening behaviour, RC–1487, Michigan Department of Transportation
Burnham, T. R. (1999). A field study of PCC joint misalignment near Fergus Falls, Minnesota, Report No. 1999–29, Minnesota Department of Transportation
Prabhu, M., Buch, N., Varma, A. H., & Thandaveswara, D. (2006). Experimental investigation of effects of dowel misalignment on joint opening behavior in rigid pavements. Transportation Research Record, 1947, 15–27.
Prabhu, M., Varma, A. H., & Buch, N. (2007). Experimental and analytical investigations of mechanistic effects of dowel misalignment in jointed concrete pavements. Transportation Research Record, 2037, 12–29.
Saxena, P., Hoegh, K., Khazanovich, L., & Gotif, A. (2009). Laboratory and finite element evaluation of joint lockup. Transportation Research Record. https://doi.org/10.3141/2095-04
Rao, S., Hoegh, K., Yu, T., & Khazanovich, L. (2009). Evaluation of dowel alignment constructability in portland cement concrete pavements. Transportation Research Record. https://doi.org/10.3141/2098-09
Seo, Y., & Kim, S. (2012). Longitudinal cracking at transverse joints caused by dowel bars in jointed concrete pavements. KSCE Journal of Civil Engineering, 17, 395–402.
Saxena. P., Hoegh, K., Khazanovich, L., & Gotlif, A. (2012). Laboratory and analytical modelling of misaligned dowel. International Journal of Pavement Engineering, 13(3), 209–215. https://doi.org/10.1080/10298436.2011.596936
Yahia, A. C., & Majidzadeh, T. (2014). Approach to identify misaligned dowel and tie bars in concrete pavements using ground penetrating radar. Case Studies in Nondestructive Testing and Evaluation, 2, 14–26.
Yan-cong, Z., & Ling-ling, G. (2016). Effect of dowel bar position deviation on joint load-transfer ability of cement concrete pavement. Journal of International Journal of Pavement Research and Technology, 9, 30–36.
Grosek, J., Zuzulova, A., & Brezina, I. (2019). Effectiveness of dowels in concrete pavement, materials. MDPI, 12, 2–15.
Fallah, F., & Kim, Y. R. (2016). Evaluation of dowel bar inserter practices in PCC pavements with magnetic tomography technology, Report MPMC–04, Nebraska Transportation Centre.
IRC: 58-2015: Guidelines for the design of jointed plain cement concrete pavement, Indian Roads Congress, IRC, New Delhi
Baek, J., & Al-Qadi, I. L. (2006). Finite element method modeling of reflective cracking initiation and propagation. Journal of Transportation Research Board, 1949, 32–42.
Vandenbossche, J. M. (1999). Estimating potential aggregate interlock load transfer based on measurements of volumetric surface texture of fracture plane, Transportation Research Record, Paper No.99-0903
El-Hamrawry, S., El-Maaty, A. A. E., Hekal, G. M., Salah, E., & El-Din, M. (2016). 3D modelling and analysis of jointed rigid airfield pavement using ABAQUS. International Conference on Civil and Architecture Engineering. https://doi.org/10.21608/iccae.2016.43471
Mackiewicz, P. (2015). Finite element analysis of stress concentration around dowel bars in jointed plain concrete pavement. Journal of the Transportation Engineering. https://doi.org/10.1061/(ASCE)TE.1943-5436.0000768