Effect of Changing Properties of Wythes in Precast Structural Sandwich Panels
Abstract
This study investigates the effects of changing in the properties of face and core wythes in structural sandwich panels (with dimensions of 500 500 mm and 120 mm total height). Concrete face wythes of three grades (80, 70, 37) MPa, thicknesses of (25, 35, and 45) mm, and three types of core materials (high density foam, polyethylene foam, and palm bark) were used in the production of panels. Steel shear connectors were installed in the panels with angle of 45º. Three-point bending load test was carried out on all panels and results were compared with both of the theoretical extremes capacities of non- composite and fully-composite states and ANSYS software results. The degree of composite action (%) and the (strength/weight) ratio were the main parameters that judged the specimens. It was found that upgrading concrete increased overall strength of slabs especially in high strength concrete (80 MPa), however the use of lightweight concrete (70 MPa) caused high (strength/weight) ratio due to very lightweight. Results revealed that decreasing thickness of concrete face wythes had a positive effect on strength/weight ratio (although the ultimate loads decreased) that enhanced the performance of panels as lightweight structural panels. The optimum face wythe thickness is that of 2.5 cm and has high (strength/weight) ratio. It was noticed that adding polyethylene foam as a core material results in positive effect and high (strength/weight) ratio. Results revealed that high strength concrete (80 MPa) and light-weight concrete (37 MPa) are very successful in the production face wythes of precast light-weight sandwich panels that can obtain high (strength/weight) ratio and high percent of composite action.
Keywords
References
Choi, Wonchang, Seok-Joon Jang, and Hyun-Do Yun. “Design Properties of Insulated Precast Concrete Sandwich Panels with Composite Shear Connectors.” Composites Part B: Engineering 157 (January 2019): 36–42. doi:10.1016/j.compositesb.2018.08.081.
Lee, Ji-Hyung, Sung-Hoon Kang, Yu-Jin Ha, and Sung-Gul Hong. “Structural Behavior of Durable Composite Sandwich Panels with High Performance Expanded Polystyrene Concrete.” International Journal of Concrete Structures and Materials 12, no. 1 (February 22, 2018). doi:10.1186/s40069-018-0255-6.
Insub Choi, JunHee Kim, and Young-Chan You, “Effect of cyclic loading on composite behavior of insulated concrete sandwich wall panels with GFRP shear connectors.” Composites Part B: Engineering, Volume 96, (July 1, 2016): 7–19. doi:10.1016/j.compositesb.2016.04.030.
Mohamed Mahdy, Ahmed Reheem and P. Speare. “Mechanical properties of heavyweight, high strength concrete.” Proceedings of the annual Conference of the Canadian Society for Civil Engineering, Montréal, Canada, (June 5, 2002):5-8.
Douglas Tomlinson and Amir Fam, “Flexural behavior of precast concrete sandwich wall panels with basalt FRP and steel reinforcement.” PCI Journal, vol. 60, no. 6, (November 1, 2015): 51–71. doi:10.15554/pcij.11012015.51.71.
Douglas Tomlinson and Amir Fam, “Experimental investigation of precast concrete insulated sandwich panels with glass fiber-reinforced polymer shear connectors.” ACI Structural Journal, vol. 111, no. 3, (January 5, 2014): 595-606. doi:10.14359/51686621.
J. Daniel Ronald Joseph, J. Prabakar, and P. Alagusundaramoorthy, “Flexural behavior of precast concrete sandwich panels under different loading conditions such as punching and bending.” Alexandria Engineering Journal, vol. 57, no. 1, (March 1, 2018): 309–320. doi:10.1016/j.aej.2016.11.016.
Wahid Ferdous, Allan Manalo, Thiru Aravinthan, and Amir Fam, “Flexural and shear behaviour of layered sandwich beams.” Construction and Building Materials, vol. 173, (June 10, 2018): 429–442. doi:10.1016/j.conbuildmat.2018.04.068.
Jauhar Fajrin, Yan Zhuge, Hao Wang and Frank Bullen, “Experimental and Theoretical Deflections of Hybrid Composite Sandwich Panel under Four-point Bending Load.” Civil Engineering Dimension, vol. 19, no. 1, (March 1, 2017): 29–35. doi:10.9744/ced.19.1.29-35.
J. Daniel Ronald Joseph, J. Prabakar, and P. Alagusundaramoorthy, “Precast concrete sandwich one-way slabs under flexural loading.” Engineering Structures, vol. 138, (May 1, 2017): 447–457. doi:10.1016/j.engstruct.2017.02.033.
Won-Hee Kang and JunHee Kim, “Reliability-based flexural design models for concrete sandwich wall panels with continuous GFRP shear connectors.” Composites Part B: Engineering, vol. 89, (March 15, 2016): 340–351. doi:0.1016/j.compositesb.2015.11.040.
Y.H. Mugahed Amran, Raizal S.M.Rashid, Farzad Hejazi, Nor Azizi Safiee, and A.A. Abang Ali, “Response of precast foamed concrete sandwich panels to flexural loading.” Journal of Building Engineering, vol. 7, (September 1, 2016): 143–158. doi:10.1016/j.jobe.2016.06.006.
Mohamed Mahdy, “Structural Lightweight Concrete Using Cured Leca.”, International Journal of Engineering and Innovative Technology (IJEIT), Volume 5, Issue 9, (March 1, 2016): 25-31. doi:10.17605/osf.io/mcvb3.
Mohamed Mahdy, Mahmoud Imam, Ahmed Tahwia, and Osama Yousef, “Study on Heat Transfer of Sandwich Panels." Proceedings of the 7th International Engineering Conference, Faculty of Engineering, Mansoura University, Egypt, volume 1, (March 23, 2010).
A. Benayoune, A.A. AbdulSamad, D.N.Trikha, A.A. Abang Ali, and S.H.M. Ellinna, “Flexural behaviour of pre-cast concrete sandwich composite panel - Experimental and theoretical investigations.” Construction and Building Materials, vol. 22, no. 4, (April 1, 2008): 580–592. doi:10.1016/j.conbuildmat.2006.11.023.
Mohamed Mahdy, Mahmoud Imam, Ahmed Tahwia, and Osama Yousef, “Experimental Study of Structural Sandwich Members.”, Housing & Building National Research Journal (HBRC), Vol 7, No 3, (December 1, 2011): 48-58.
R., Balamuralikrishnan, and Saravanan J. “Finite Element Analysis of Beam – Column Joints Reinforced with GFRP Reinforcements.” Civil Engineering Journal 5, no. 12 (December 1, 2019): 2708–2726. doi:10.28991/cej-2019-03091443.
DOI: 10.28991/cej-2020-03091581
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