Nonlinear Modeling and Analysis of AAC infilled Sandwich Panels for out of Plane Loads
Sandwich panels are widely used in the construction
industry for their ease of assembly, light weight and efficient thermal
performance. They are composed of two RC thin outer layers
separated by an insulating inner layer. In this research the inner
insulating layer is made of lightweight Autoclaved Aerated Concrete
(AAC) blocks which has good thermal insulation properties and yet
possess reasonable mechanical strength. The shear strength of the
AAC infill is relied upon to replace the traditionally used insulating
foam and to provide the shear capacity of the panel. A
comprehensive experimental program was conducted on full scale
sandwich panels subjected to bending. In this paper, detailed
numerical modeling of the tested sandwich panels is reported. Nonlinear
3-D finite element modeling of the composite action of the
sandwich panel is developed using ANSYS. Solid elements with
different crashing and cracking capabilities and different constitutive
laws were selected for the concrete and the AAC. Contact interface
elements are used in this research to adequately model the shear
transfer at the interface between the different layers. The numerical
results showed good correlation with the experimental ones
indicating the adequacy of the model in estimating the loading
capacity of panels.
[1] Abdel-Mooty, M., Al-Kashif, M., Fahmy, E., Abou Zeid, M., and
Haroun M. (2012). Reinforced Concrete Sandwich Panels with
Autoclaved Aerated Concrete Infill, Proceedings of the International
Conference on Innovation and Technology for Sustainable Built
Environment, April 16-17, Malaysia.
[2] Benayoune, A. et al. (2008). Flexural Behaviour of Precast Concrete
Sandwich Composite Panel - Experimental and Theoretical
Investigations, Construction and Building Materials Journal, Vol. 22, pp
580-592.
[3] Fahmy, E., Shaheen, Y., Abou Zeid, M., and Gaafar H. (2006).
Ferrocement Sandwich and Hollow Core Panels for Wall Construction,
Journal of Ferrocement, Vol. 36, No. 3, Thailand, July 2006.
[4] Salmon, D., Einea, A., Tadros, M., and Culp, T. (1994). A New
Structurally and Thermally Efficient Precast Sandwich Panel Systems,
PCI Journal, Vol. 39, No. 4, 90-101
[5] Kachlakev D.I., Miller, T., Yim, S., Chansawat, K. and Potisuk, T.
(2001). Finite Element Modeling of Reinforced Concrete Structures
Strengthened With FRP Laminates, California Polytechnic State
University, San Luis Obispo, CA
[6] Kim E. Seeber et al. (1997). State-of-the-Art Report on
Precast/Prestressed Sandwich Wall Panels- PCI Committee Report, PCI
Journal, Vol.42, No.2, pp 1-61
[7] Willam, K. and Warnke, E. (1975). Constitutive Model for the Triaxial
Behavior of Concrete. Proceedings, International Association for Bridge
and Structural Engineering, Italy. Vol. 19. p. 174.
[1] Abdel-Mooty, M., Al-Kashif, M., Fahmy, E., Abou Zeid, M., and
Haroun M. (2012). Reinforced Concrete Sandwich Panels with
Autoclaved Aerated Concrete Infill, Proceedings of the International
Conference on Innovation and Technology for Sustainable Built
Environment, April 16-17, Malaysia.
[2] Benayoune, A. et al. (2008). Flexural Behaviour of Precast Concrete
Sandwich Composite Panel - Experimental and Theoretical
Investigations, Construction and Building Materials Journal, Vol. 22, pp
580-592.
[3] Fahmy, E., Shaheen, Y., Abou Zeid, M., and Gaafar H. (2006).
Ferrocement Sandwich and Hollow Core Panels for Wall Construction,
Journal of Ferrocement, Vol. 36, No. 3, Thailand, July 2006.
[4] Salmon, D., Einea, A., Tadros, M., and Culp, T. (1994). A New
Structurally and Thermally Efficient Precast Sandwich Panel Systems,
PCI Journal, Vol. 39, No. 4, 90-101
[5] Kachlakev D.I., Miller, T., Yim, S., Chansawat, K. and Potisuk, T.
(2001). Finite Element Modeling of Reinforced Concrete Structures
Strengthened With FRP Laminates, California Polytechnic State
University, San Luis Obispo, CA
[6] Kim E. Seeber et al. (1997). State-of-the-Art Report on
Precast/Prestressed Sandwich Wall Panels- PCI Committee Report, PCI
Journal, Vol.42, No.2, pp 1-61
[7] Willam, K. and Warnke, E. (1975). Constitutive Model for the Triaxial
Behavior of Concrete. Proceedings, International Association for Bridge
and Structural Engineering, Italy. Vol. 19. p. 174.
@article{"International Journal of Architectural, Civil and Construction Sciences:56696", author = "Al-Kashif M. and Abdel-Mooty M. and Fahmy E. and Abou Zeid M. and Haroun M.", title = "Nonlinear Modeling and Analysis of AAC infilled Sandwich Panels for out of Plane Loads", abstract = "Sandwich panels are widely used in the construction
industry for their ease of assembly, light weight and efficient thermal
performance. They are composed of two RC thin outer layers
separated by an insulating inner layer. In this research the inner
insulating layer is made of lightweight Autoclaved Aerated Concrete
(AAC) blocks which has good thermal insulation properties and yet
possess reasonable mechanical strength. The shear strength of the
AAC infill is relied upon to replace the traditionally used insulating
foam and to provide the shear capacity of the panel. A
comprehensive experimental program was conducted on full scale
sandwich panels subjected to bending. In this paper, detailed
numerical modeling of the tested sandwich panels is reported. Nonlinear
3-D finite element modeling of the composite action of the
sandwich panel is developed using ANSYS. Solid elements with
different crashing and cracking capabilities and different constitutive
laws were selected for the concrete and the AAC. Contact interface
elements are used in this research to adequately model the shear
transfer at the interface between the different layers. The numerical
results showed good correlation with the experimental ones
indicating the adequacy of the model in estimating the loading
capacity of panels.", keywords = "Autoclaved Aerated Concrete, Concrete Sandwich
Panels, Finite Element Modeling.", volume = "6", number = "4", pages = "284-5", }