High Deformable Anchorage System in Slabs-on-Grade in Hydraulic Structures

Document Type : Research Paper

Authors

Department of Civil Engineering, Sahand University of Technology, Tabriz, Iran.

Abstract

Severe local differential displacements and the resulting high stresses in the slabs-on-grade in hydraulic structures are often caused by the displacement of bottom layers with cracks and joints or the presence of swollen soils. In addition to the above factors, the uplift due to hydrostatic and hydrodynamic pressure due to water flow under the slabs can also cause differential displacements. In this research, a ductile anchorage system with high deformable concrete element is introduced and using the designed setup, its effectiveness in comparison with conventional elastic anchorage system in the slabs under a wide uniform uplift load has been studied. High deformable concrete elements have the same strength as ordinary concrete but their compressive strain can reach 60%. These types of concrete elements are in the form of precast elements, which have many applications in structures. At first, to obtain a proper high deformable concrete element, several tests were carried out on various samples and compositions, and the behavior of the high deformable elements was studied and achieved. Experimental and numerical results show that the rate of energy absorption in deformable anchorage systems is 4 times that of conventional elastic anchors, and the use of ductile supports can prevent cracking of slabs in hydraulic structures.

Keywords

References

  1. González Betancourt M (2016). Uplift force and momenta on a slab subjected to hydraulic jump. DYNA, 83 (199): 124-133. http://dx.doi.org/10.15446/dyna.v83n199.52252
  2. Reclamation (2014). Design Standard 14, Appurtenant Structures for Dams (Spillways and Outlet Works), Chapter 3: “General Spillway Design Considerations”.
  3. Reclamation USACE (2015). Best Practices in Dam and Levee Safety Risk Analysis, Chapter VI-1, “Stagnation Pressure Failure of Spillway Chutes”.
  4. Bollaert Erik (2002). Transient water pressures in joints and formation of rock scour due to high-velocity jet impact. These EPFL, No. 2548.
  5. Melo JF, Pinheiro AN and Ramos CM (2006). Forces on Plunge Pool Slabs: Influence of Joint Location and Width, J. Hyd. Eng., 132(1): 49-60.
  6. Hepler TE and Johnson PL (1988). Analysis of spillway failures by uplift pressure. In Hydraulic Engineering, ASCE, 857-862.
  7. Trojanowski J (2004). Assessing failure potential of spillways on soil foundation. In Proc., Association of State Dam Safety Officials Annual Conf. Lexington, KY.
  8. Chen FH (2012). Foundations on expansive soils. Elsevier, 12.
  9. Virgilio Fiorotto and Paolo Salandin, (2000). DESIGN OF ANCHORED SLABS IN SPILLWAY STILLING BASINS. Journal of Hydraulic Engineering, 126(7). 0733-9429/00/0007-0502–0512.
  10. Kurokawa S, Masumoto K, Koizumi Y, Okada Y and Utsuno M (2019). Evaluation of deformable support in squeezing ground by experiment and numerical analysis. In Proceedings of the 5th ISRM Young Scholars’ Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, Okinawa, Japan, 1–4.
  11. Mezger F, Ramoni M and Anagnostou G (2018). Options for deformable segmental lining systems for tunnelling in squeezing rock. Tunn. Undergr. Space Technol, 76: 64–75.
  12. Verient M, Kluckner A, Radoncic N and Schubert W (2015). Investigations on telescope yielding elements with porous filling. In Proceedings of the ISRM Regional Symposium-EUROCK, Salzburg, Austria, 7–10.
  13. Radoncic N, Schubert W and Moritz B (2009). Ductile support design. Géoméch. Und Tunn, 2: 561–577.
  14. Wu K, Shao Z and Qin S (2020). A solution for squeezing deformation control in tunnels using foamed concrete: A review. Constr. Build. Mater, 257.
  15. K Kovari (2009). Consulting Engineer, Fabrikstr. 4, 8102 Oberengstringen, Switzerland-design methods with yielding support in squeezing and swelling rocks, World Tunnel Congress 2009, Budapest, Hungary, may 23-28.
  16. Kovari K and Chiaverio F (2007). Modular yielding support for tunnels in heavily swelling rock. Stuva Conference, Köln November.
  17. Thut A, Nateropp D, Steiner P and Stolz M (2006). Tunnelling in squeezing rock-yielding elements and face control. 8th Int. Conf. on Tunnel Construction and Underground Structures, Ljubljana.
  18. Singh M, Singh B and Choudhari J (2007) Critical strain and squeezing of rock mass in tunnels. Tunnel. Underg. Space Technol., 47: 123-135. https://doi.org/10.1016/j.tust.2006.06.005.
  19. Opolony K, Einch HB and Thewes M (2011). Testing of yielding elements for ductile support. World Tunnel Congress and 37th General Assembly, Helsinki.
  20. Kesejini Yasser Alilou et al. (2021). High Deformable Concrete (HDC) element: An experimental and numerical study. Advances in Concrete Construction 11(5): 357-365.
  21. Zheng X, Wu K, Shao Z, Yuan B and Zhao N (2022). Tunnel Squeezing Deformation Control and the Use of Yielding Elements in Shotcrete Linings: A Review. Materials, 15(391). https://doi.org/10.3390/ma15010391.
  22. Deng M and Zhang Y (2017). Cyclic loading tests of RC columns strengthened with high ductile fiber reinforced concrete jacket. Constr. Build. Mater., 153: 986-995. https://doi.org/10.1016/j.conbuildmat.2017.07.175.
  23. Deng M, Ma F, Ye W and Li F (2018). Flexural behavior of reinforced concrete beams strengthened by HDC and RPC. Constr. Build. Mater., 188: 995-1006. https://doi.org/10.1016/j.conbuildmat.2018.08.124.
  24. Deng M, Ma F, Ye W and Liang X (2018). Investigation of the shear strength of HDC deep beams based on a modified direct strut-and-tie model. Constr. Build. Mater., 172: 340-348. https://doi.org/10.1016/j.conbuildmat.2018.03.274.
  25. Li T, Deng M, Dong Zh, Zhang Y and Zhang C (2020). Masonry columns confined with glass textile-reinforced high ductile concrete (TRHDC) jacket. Eng. Struct., 222, 111123. https://doi.org/10.1016/j.engstruct.2020.111123.
  26. Deng M, Dong Zh, Wang X, Zhang Y and Zhou T (2020). Shaking table tests of a half-scale 2-storey URM building retrofitted with a high ductility fibre reinforced concrete overlay system. Eng. Struct., 197: 109424. https://doi.org/10.1016/j.engstruct.2019.109424.
  27. Deng M, Li T and Zhang Y (2020). Compressive performance of masonry columns confined with highly ductile fiber reinforced concrete (HDC). Constr. Build. Mater., 254, 119264. https://doi.org/10.1016/j.conbuildmat.2020.119264.
  28. Deng M, Ma F, Song S, Lu H and Sun H (2020). Seismic performance of interior precast concrete beam-column connections with highly ductile fiber-reinforced concrete in the critical cast-in-place regions. Eng. Struct., 210, 110360. https://doi.org/10.1016/j.engstruct.2020.110360.
  29. Deng M, Ma F, Wang X and Lu H (2020). Investigation on the shear behavior of steel reinforced NC/HDC continuous deep beam, Eng. Struct., 23: 20-25. https://doi.org/10.1016/j.istruc.2019.10.002.
  30. Deng M, Zhang W and Li N (2020). In-plane cyclic loading tests of concrete hollow block masonry walls retrofitted with high ductile fiber-reinforced concrete. Constr. Build. Mater., 238, 117758. https://doi.org/10.1016/j.conbuildmat.2019.117758.
  31. Deng M, Zhang W and Yang S (2020). In-plane seismic behavior of autoclaved aerated concrete block masonry walls retrofitted with high ductile fiber-reinforced concrete. Eng. Struct., 219, 110854. https://doi.org/10.1016/j.engstruct.2020.110854.
  32. Foroughi S and Yuksel B (2020). Investigation of nonlinear behavior of high ductility reinforced concrete shear walls. Int. Adv. Res. Eng. J., 4(2): 116-128.
  33. Yuan TF, Lee JY and Yoon YS (2020). Enhancing the tensile capacity of no-slump high-strength high-ductility concrete. Cement Concrete Compos., 106, 103458. https://doi.org/10.1016/j.cemconcomp.2019.103458.
  34. ASTM C39/C 39M-01 (2001). Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens, ASTM International, West Conshohocken, PA.
  35. ASTM D4546, (2014). Standard Test Methods for One-Dimensional Swell or Collapse of Soils pdf Download. File Size 165.65 KB.
  36. Kent DC and Park R (1971). Flexural Members with Confined Concrete. J. Struct. Div. 97, 1969–1990. https://doi.org/10.1061/jsdeag.0002957.
  37. Soranakom C and Mobasher B (2007). Closed-Form Moment-Curvature Expressions for Homogenized Fiber-Reinforced Concrete. Aci Mater. J. 104, 351.

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