Question

Q1. A continuous one-way slab is subjected to Gu(including self-weight) - 7.0 kN/m' Q-4.5 kN/m2. At the exterior ends, the slab is cast monolithically with the edge beams. Assume C30/37 concrete, grade 500 steel, and 25-mm cover to bars. Size of each beam is 350mm x 450mm, size of each column is 400mm x 400mm. (a) Determine the slab thickness. (b) Check whether the design shears and moments at critical sections (e.g. at mid- spans and supports) can be determined by using Table 8.1 (shear and bending moment coefficients) in Mosley et al. (2007) (c) Determine the design shears and moments at critical sections. Note that if the Table 8.1 in Mosley et al. (2007) is not applicable, then analytical methods (such as the moment distribution method) should be used. (d) Design the bending reinforcement and distribution reinforcement (e) Make the curtailment according to the simplified curtailment rules (f) Check for shear resistance and deflection. 5000 mm 5000 mm 4500 mm 4500 mm 4500 mm 4500 mm Fig. Q1 Table 8.1 Ultimate bending moment and shear force coefficients in one-way spanning slabs Class Bor C steel End support condition At Pinned Continuous 0.25d such At first middle At interior of interior End support middle support span support interior supports End Outer Near that z>0.9d to allow for 20% moment redistribution allowed for in table of end span 0.086FI spans 0 0.075F 0.063FI Moment 0.04FI 0.086FI 0.06FI Shear 0.4F 0.6F 0.5F 0.46F L effective span. Area of each bay> 30m2F total ultimate load 1.35G, +1.50Q,

Answer 1

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