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
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