Analysis of Concave Curling in Concrete Slabs

Factors influencing stresses and movements in continuously reinforced concrete pavements – A review

“…The lift-off in concrete slabs has been investigated by many researchers so far, by taking into consideration effects of curling and warping, together and separately (Westergaard, 1927;Tang et al, 1993;Bari & Zollinger, 2016;Jeong & Zollinger, 2006;Jeong et al, 2006;Bissonnette et al, 2007;Mohamed & Hansen, 1997;Rao & Roesler, 2005;Yu et al, 1998;Rao et al, 2001). A pioneering work has been done by Westergaard (1927) on the thermal stress field analysis in rigid slabs due to their curling.…”

“…He presented a linear elastic solution for the slab curling assuming a linear temperature gradient through the slab thickness and an elastic Winkler foundation for the subgrade. Tang et al (1993) suggested an analytical approach to evaluate stress and displacement distribution in a semi-infinite slab and in an infinitely-long slab of a finite width. They also considered the effect of gap that may occur under the concrete slab resulting from curling and proposed an approximate formula for the maximum stress in a finite slab.…”

A new approach to the design of rigid pavement: single-axle loading

“…The repeated application of axle loads along with temperature variation may lead to initiation of cracks at the highly stressed locations. There are three critical locations such as corner, edge and interior, which affect the structural performance of pavements (Kim & Lee, 2013;Lee & Lee, 1996;Lee, Yen, Lee, Bair, & Lee, 1997;Setyawan, Zoorob, & Hasan, 2013;Tang, Zollinger, & Senadheera, 1993;Tunç, 2001). The crack propagation through the pavement -especially for these locations -leads to failure of the system because of fatigue.…”

“…The temperature may also cause cracks in the concrete pavement alone because the concrete slab will tend to curl upward or downward when it is subjected to an increasing or *Corresponding author. Email: unsalb@atauni.edu.tr decreasing temperature variation through its depth (during day time and night time) (Jeong & Zollinger, 2005;Kim & Nam, 2010;Mackiewicz, 2014;Siddique, Hossain, & Meggers, 2005;Tang et al, 1993).…”

“…It can expand or contract axially, or it can bend with its cross-section remaining plane. The first deformation can be caused by a uniform temperature gradient; the second can be caused by the combined effects of linear temperature gradient and traffic loading (Choubane & Tia, 1995;Tang et al, 1993). The total stress due to critical thermal loading conditions can be obtained by adding algebraically the bending stresses due to a combination of a linear temperature gradient and loading conditions (Choubane & Tia, 1995).…”