1. Home
  2. Vol 8, No 8 (2022)
  3. Abdullah

Effect of Stirrups on the Behavior of Semi-Precast Concrete Slabs

Mazin Diwan Abdullah, Khamail Abdul-Mahdi Mosheer

Abstract


A semi-slab of precast concrete (or half-slab) is a structural system that consists of concrete at the bottom half of a slab and concrete cast in situ at the top. To avoid traditional formwork and minimize the bottom half of the slab, this section can function as formwork and reduce the thickness of precast slabs, which makes their transportation easy. The interface between precast and overtopping concrete is effective for the slab system's performance. To improve the half-slab floor system, it is needed to have a shear connector (stirrups). Therefore, to better understand the behavior of this slab system, six full-scale slab specimens (2×7.5 m) with different shapes of the stirrups and spacing between them were constructed for this study. One specimen was produced with no connections and served as a reference specimen, while the other employed stirrups to connect slab units. The tests found that the distribution and type of stirrups affect the structural performance of the semi-precast concrete slab. The maximum load capacity of slabs with rectangular or triangular connections was nearly more significant than reference slabs, reaching 136.11 and 86.11%, respectively. The maximum load increased by 81.4 % for rectangular connections and 54.9% for triangular connections when the distance between the connectors was reduced from 600 to 300 mm. Furthermore, stirrups in semi-precast slabs could improve the cracking behavior, stiffness, and ductility.

 

Doi: 10.28991/CEJ-2022-08-08-09

Full Text: PDF


Keywords


Semi-Slabs; Precast Concrete; Site-in-place Concrete; Stirrups; Spacing.

References


Siswosukarto, S. (2013). Semi Precast Slab As an Alternative Method To Promote Green Construction in Residential Projects. Proceeding of the 6th Civil Engineering Conference in Asia Region: Embracing the Future through Sustainability (CECAR 6), 20-22 August, 2013, Jakarta, Indonesia.

Pessiki, S., Prior, R., Sause, R., & Slaughter, S. (1995). Review of existing precast concrete gravity load floor framing systems. PCI Journal, 40(2), 52–68. doi:10.15554/pcij.03011995.52.68.

Lee, J. D., Yoon, J. K., & Kang, T. H.-K. (2016). Combined half precast concrete slab and post-tensioned slab topping system for basement parking structures. Journal of Structural Integrity and Maintenance, 1(1), 1–9. doi:10.1080/24705314.2016.1153281.

Zilch, K., & Reinecke, R. (2000). Capacity of shear joints between high-strength precast elements and normal-strength cast-in-place decks. PCI/FHWA/FIB International Symposium on High Performance Concrete, 25-27 September, 2000, Orlando, United States.

Santos, P. M. D., Júlio, E. N. B. S., & Silva, V. D. (2007). Correlation between concrete-to-concrete bond strength and the roughness of the substrate surface. Construction and Building Materials, 21(8), 1688–1695. doi:10.1016/j.conbuildmat.2006.05.044.

Cavaco, E., & Camara, J. (2017). Experimental research on the behaviour of concrete-to-concrete interfaces subjected to a combination of shear and bending moment. Engineering Structures, 132, 278–287. doi:10.1016/j.engstruct.2016.11.041.

Sørensen, J. H., Hoang, L. C., Olesen, J. F., & Fischer, G. (2017). Test and analysis of a new ductile shear connection design for RC shear walls. Structural Concrete, 18(1), 189–204. doi:10.1002/suco.201600056.

Cavaco, E., Pacheco, I., & Camara, J. (2018). Detailing of concrete-to-concrete interfaces for improved ductility. Engineering Structures, 156, 210–223. doi:10.1016/j.engstruct.2017.10.058.

Xia, J., Shan, K. yi, Wu, X. hui, Gan, R. li, & Jin, W. liang. (2021). Shear-friction behavior of concrete-to-concrete interface under direct shear load. Engineering Structures, 238, 112211. doi:10.1016/j.engstruct.2021.112211.

Kim, D. W., & Shim, C. S. (2014). Structural Performance of Pre-tensioned Half-depth Precast Panels. Journal of the Korean Society of Civil Engineers, 34(6), 1707. doi:10.12652/ksce.2014.34.6.1707.

Kim, D. W., & Shim, C. S. (2015). Crack width control on concrete slab using half-depth precast panels with loop joints. KSCE Journal of Civil and Environmental Engineering Research, 35(1), 19-29. doi:10.12652/ksce.2015.35.1.0019.

Asamoah, R. O., Ankrah, J. S., Offei-Nyako, K., & Tutu, E. O. (2016). Cost Analysis of Precast and Cast-in-Place Concrete Construction for Selected Public Buildings in Ghana. Journal of Construction Engineering, 2016, 1–10. doi:10.1155/2016/8785129.

Vakhshouri, B. (2016). Time-dependent bond transfer length under pure tension in one way slabs. Structural Engineering and Mechanics, 60(2), 301–312. doi:10.12989/sem.2016.60.2.301.

Pan, Y., Ventura, C. E., & Cheung, M. M. S. (2017). Performance of highway bridges subjected to blast loads. Engineering Structures, 151, 788–801. doi:10.1016/j.engstruct.2017.08.028.

Cho, K., Shin, Y. su, & Kim, T. (2017). Effects of half-precast concrete slab system on construction productivity. Sustainability (Switzerland), 9(7). doi:10.3390/su9071268.

Gowthami, N. R., & Ramanjaneyulu, K. (2014). Segmental Composite Bridge Decks. Master Thesis, Jawaharlal Nehru Technological University, Ananthapur, India.

Newell, S., & Goggins, J. (2019). Experimental study of hybrid precast concrete lattice girder floor at construction stage. Structures, 20, 866–885. https://doi.org/10.1016/j.istruc.2019.06.022.

Mohamed, M. S., Thamboo, J. A., & Jeyakaran, T. (2020). Experimental and numerical assessment of the flexural behaviour of semi-precast-reinforced concrete slabs. Advances in Structural Engineering, 23(9), 1865–1879. doi:10.1177/1369433220904011.

Zhang, X., Li, H., Liang, S., & Zhang, H. (2021). Experimental and numerical study of lattice girder composite slabs with monolithic joint. Crystals, 11(2), 1–16. doi:10.3390/cryst11020219.

Kanchanadevi, A., Ramanjaneyulu, K., & Srinivas, V. (2022). Flexural Behaviour of Concrete Composite Slabs with Different Configurations of Truss Type Shear Connectors. Journal of the Institution of Engineers (India): Series A, 103(3), 767–783. doi:10.1007/s40030-022-00659-9.

Liu, W., Cui, S., Liu, C., & Shi, L. (2021). Experimental and theoretical study on bending behavior of prestressed concrete composite slabs with steel trusses. Journal of Building Structures, 42(8), 95–106. doi:10.14006/j.jzjgxb.2019.0289.

Liu, Y. L., Huang, J. Q., Chong, X., & Ye, X. G. (2021). Experimental investigation on flexural performance of semi-precast reinforced concrete one-way slab with joint. Structural Concrete, 22(4), 2243–2257. doi:10.1002/suco.202000676.

BS EN 12390-7:2019. (2019). Testing hardened concrete Part 7: Density of hardened concrete. British Standards Institution, London, United Kingdom.

ASTM A1058-19. (2019). Standard Test Methods and Definitions for Mechanical Testing of Steel Products-Metrics. ASTM International, Pennsylvania, United States. doi:10.1520/A1058-19.

ASTM C204-18e1. (2019). Test Methods for Fineness of Hydraulic Cement by Air-Permeability Apparatus. ASTM International, Pennsylvania, United States. doi:10.1520/C0204-18E01.

ASTM C191-21. (2021). Standard Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle. ASTM International, Pennsylvania, United States. doi:10.1520/C0191-21.

ASTM C349-02. (2010). Standard Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken in Flexure). ASTM International, Pennsylvania, United States. doi:10.1520/C0349-02.

ASTM C33. (1986). Standard Specification for Concrete Aggregates. ASTM International, Pennsylvania, United States.

ASTM C C128-15. (2015). Standard Test Method for Density for Relative Density (Specific Gravity) and Absorption. ASTM International, Pennsylvania, United States. doi:10.1520/C0128-15.


Full Text: PDF

DOI: 10.28991/CEJ-2022-08-08-09

Refbacks

  • There are currently no refbacks.


Bookmark and Share


Copyright (c) 2022 mazen dewan dewan

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
x
Message