Question 78

A concrete floor slab of 140 mm thick is reinforced by 16mm diasteel rods placed 38 mm above the lower face of the slab and spaced 150mm oncenter. The distance from the upper face of slab to steel is 100mm. The modulus of elasticity is 25 Gpa for concrete and 200 Gpa for steel. Knowing that a bending moment of 4.5KN-M is applied to each 0.30m width of slab, determine the maximum stress in the concrete and steel respectively


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