GATE CE 2024 Set 2 — Question 29
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Transportation Engineering → Pavement Design → Temperature Stresses
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Question
Various stresses in jointed plain concrete pavement with slab size of are denoted as follows:Wheel load stress at interior =
Wheel load stress at edge =
Wheel load stress at corner =
Warping stress at interior =
Warping stress at edge =
Warping stress at corner =
Frictional stress between slab and supporting layer = The critical stress combination in the concrete slab during a summer midnight is
Wheel load stress at edge =
Wheel load stress at corner =
Warping stress at interior =
Warping stress at edge =
Warping stress at corner =
Frictional stress between slab and supporting layer = The critical stress combination in the concrete slab during a summer midnight is
Correct answer
(A) S_(wl)^c + Sₜ^c
Solution
In a concrete pavement slab:
1.Summer Midnight: The top surface is cooler than the bottom surface. This causes the slab to warp upwards at the corners (curling). This creates tensile stress at the top of the corner.
2.Wheel Load at Corner: A wheel load applied at the corner also causes tensile stress at the top of the slab.
3.Critical Combination: Since both warping and wheel load create tensile stress at the same location (top of corner), they are additive. Frictional stress is typically considered for interior/edge regions and is negligible at corners.
Therefore, the critical combination is .Continue learning with Success Tracker
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