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Thermal buckling and postbuckling analysis of functionally graded concrete slabs with initial imperfections Zhang, H, Zhang, Z, Wu, H, Kitipornchai, S, Chai, G and Yang, J 2018, 'Thermal buckling and postbuckling analysis of functionally graded concrete slabs with initial imperfections', International Journal of Structural Stability and Dynamics, vol. 18, no. 11, pp. 1-19. Document type: Journal Article Collection: Journal Articles Title Thermal buckling and postbuckling analysis of functionally graded concrete slabs with initial imperfections Author(s) Zhang, H Zhang, Z Wu, H Kitipornchai, S Chai, G Yang, J Year 2018 Journal name International Journal of Structural Stability and Dynamics Volume number 18 Issue number 11 Start page 1 End page 19 Total pages 19 Publisher World Scientific Publishing Co. Pte Ltd Abstract This paper proposes a novel functionally graded (FG) concrete slab and investigates its thermal buckling and postbuckling performance using the finite-element (FE) method. The concrete slab consists of three homogeneous thick layers - a fiber-reinforced concrete layer, a geopolymer concrete layer, and a plain Portland cement (PPC) layer - with a thin FG layer between the thick layers. The mechanical properties of the thin FG layers are exponentially graded across the thickness direction. The effects of initial imperfection, the self-weight of the slab, and the friction between the slab and rigid foundation are considered in the analysis. The FE model is validated against the results reported in the literature. A comprehensive parametric study is conducted to examine the effects of the thickness and volume fraction index of the FG layer, initial imperfection, self-weight, friction, and slab slenderness ratio on the thermal buckling and postbuckling behaviors of the concrete slab. The numerical results demonstrate that the proposed FG slab exhibits remarkably better buckling and postbuckling resistance than a conventional PPC concrete slab and that the influences of both self-weight and friction are important and cannot be neglected. Subject Solid Mechanics Structural Engineering Keyword(s) concrete slab finite-element method functionally graded material postbuckling Thermal buckling DOI - identifier 10.1142/S0219455418501420 Copyright notice © 2018 World Scientific Publishing Company ISSN 0219-4554 Related Links Link Description https://dx.doi.org/10.1142/S0219455418501420 Link to Published Version   Versions Version Filter Type Tue, 30 Apr 2019, 13:45:53 EST Tue, 04 Jun 2019, 09:36:21 EST Filtered Full Citation counts:   Cited 0 times in Thomson Reuters Web of Science Article Cited 0 times in Scopus Article Altmetric details: Access Statistics: 12 Abstract Views  -  Detailed Statistics Created: Mon, 29 Apr 2019, 13:04:00 EST by Catalyst Administrator