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Assignment-4 - CIVL 232 Design of Structural Concrete...

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CIVL 232 Design of Structural Concrete Assignment 4 (Thursday, 25 2004) Sections subjected to axial load and uniaxial bending; shear of RC beam sections 4.1 Construct an approximate M-N interaction diagram for the column section with h = 400 mm, d = 350 mm, d = 50 mm, b = 300 mm, s s sc A A A = = 2 / = 981 mm 2 (2T25). Hint: At least four points (see Fig. 4.1 points a , b , c and d ), which represent different modes of failure, should be found. Fig. 4.1 4.2 A rectangular column section of breadth 350 mm, depth 600 mm (considering d = 0.9 h ), with symmetrical arrangement of reinforcement, is constructed. f cu = 40 N/mm 2 and f y = 460 N/mm 2 . (a) When N = 3000 kN and M = 800 kNm, calculate A sc using BS 8110 design charts. (b) Determine if the section has sufficient capacity to resist a design axial load of 1800 kN at an eccentricity of 500 mm. 4.3 Design the shear reinforcement for the beam with dimensions, loads and moment steel shown in Fig. 4.3. G k = 40 kN/m (including self-weight), Q k = 12 kN/m, f cu = 30 N/mm 2 , f yv = 250 N/mm 2 . Fig. 4.3
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