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Advanced Structural Design (October 2009)

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Total No. of Questions : 8] [Total No. of Pages : 2 [3664] - 115 P 1310 B.E. (Civil) ADVANCED STRUCTURAL DESIGN (2003 Course) (401007) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Attempt Q.1 or Q.2, Q.3 or Q.4 from Section I and Q.5 or Q.6, Q.7 or Q.8 from Section II. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of cell phone is prohibited in the examination hall. 6) Use of pocket calculator, relevant IS codes and steel table is allowed. 7) Assume suitable data, if necessary. SECTION - I Q1) Two channel sections without bent lips 180 mm x 50 mm are connected with the webs to acts as a beam. The thickness of channel section is 2 mm. The effective span of a simply supported beam is 3.8 m. Determine the maximum uniformly distributed load including self weight, which may be supported by the beam. The beam is laterally supported throughout its length. Refer IS : 811 - 1961 for properties of channel section. [25] OR Q2) An advertising board of size 3.2 m x 1.8 m is to be provided on a hording. The hording is located at Pune. Design the hording structure neglecting the self weight of the board. [25] Q3) Design castellated beam (open web) for a span of 12 m. The dead weight of the roofing is 750 N/m2 and live load on the roof is 1500 N/m2. Cut the selected I - section at 45o and adjust the section such that the overall depth of section [25] should not exceed 800 mm. Assume fy = 250 Mpa. OR Q4) a) The bottom chord tension member of a roof truss is subjected to an axial pull of 300 kN. A differential chain hoist arrangement is attached to the bottom chord and gives a point load of 10 kN at the centre. The length of the member between panel points is 4 m. Design the section consisting of two unequal angles with long legs kept back to back and turned [10] upwards. Assume fy = 250 Mpa. P.T.O. b) Design the column base for an axial load of 700 kN and a bending moment of 100 kN.m. The provided column section is ISHB 400 @ 82.2 kg/m. The bearing pressure from concrete may be assumed as 4000 kN/m2.[15] SECTION - II Q5) Design the interior panel of a flat slab floor system of size 24 m x 24 m for a warehouse divided into panels of 6 m x 6 m. Loading class = 5 kN/m2. Materials M 20 grade of concrete Fe 415 HYSD bars Column size = 400 mm diameter Sketch the reinforcement details in an interior panel of the flat slab. [25] OR Q6) An Intze type water tank of capacity 1 million liters, supported on an elevated tower comprising 8 columns. The base of the tank is 16 m above ground level and depth of foundation is 1 m below ground level. Adopt M 20 grade of concrete and Fe 415 grade HYSD bars. Design top dome, top ring beam, cylindrical tank wall, bottom ring beam, conical dome and bottom spherical dome. Draw the sectional elevation of the water tank showing reinforcement details in the dome, tank walls and ring girder. [25] Q7) Design a counterfort retaining wall based on the following data : Height of wall above ground level = 6 m Safe bearing capacity of soil = 160 kN/m2 Angle of internal friction = 33o Density of soil = 16 kN/m3 Spacing of counterfort = 3 m c/c Adopt M 20 grade of concrete and Fe 415 grade HYSD bars. Draw the reinforcement details. [25] OR Q8) A reinforced concrete grid is to be design to cover an area of 12 m x 16 m, the spacing of the ribs in mutually perpendicular direction being 2 m c/c. Live load is 1.5 kN/m2. Adopt M 20 grade of concrete and Fe 415 grade HYSD bars. Analyze the grid floor and design suitable reinforcements in the rib and slab. Draw the cross section of the grid showing reinforcement details in the two perpendicular directions. [25] [3664] - 115 -2-

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Additional Info : 2003 Course
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