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Advanced Structural Design (Elective II) (April 2010)

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Total No. of Questions :08] [Total No. of Pages : 2 P1850 [3764]-115 B.E. (Civil) ADVANCED STRUCTURAL DESIGN (Ele. II, 401007) (2003 Course) 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 answer books. 3) Neat diagrams must be drawn wherever necessary. 4) Figure to the right indicates full marks. 5) Assume suitable data, if necessary. 6) Use of cell phone is prohibited in the examination hall. 7) Use of electronic pocket calculator, relevent IS code & steel table is allowed. SECTION - I Q1) A 50 m microwave antenna lattice tower is to be built near Pune. The terrain at the location is nearly a level ground. It has to carry a 3 m diameter hemispherical antenna disc at the top. The necessary data is given below: The width at the top of the tower = 3.2 m. Weight of the platform at top = 0.8 kN/m2. Weight of railing at top = 0.25 kN/m. Weight of ladder and cage = 0.6 kN/m. Weight of antenna disc and fixture = 8.5 kN. Self weight of truss = 4.5 kN/m. Weight of miscellaneous items = 2.5 kN. Terrain category II and class of structure B. Draw suitable truss configuration and determine the maximum compressive and tensile forces in the leg at the base. Also the maximum transverses shear force at the base. [25] OR Q2) a) The bottom chord tension member of a roof truss is subjected to an axial pull of 400 kN. A point load of 50 kN is acting at the centre of the tension member of an effective length 4.2 m. Design the section consisting of two [12] angles section. P.T.O. b) Design a suitable base for a column subjected to an axial load of 500 kN and bending moment of 175 kNm. The column section is ISHB 450 @ 925 N/m. The safe bearing pressure of concrete assumed to be 4000 kN/m2. [13] Q3) Designed a castellated beam for a span of 15m. The dead weight of roof is 750 N/m2 and the live load on the roof is 2000 N/m2. Cut the I section at 45 and adjust the section such that the overall depth of section should not exceed 900 mm. [25] OR Q4) Two channel sections without bent lips 200 mm 50 mm are connected with webs to act as a beam. The thickness of channel is 2.5 mm. The effective span of simply supported beam is 5 m. Determine the maximum uniformly distributed load excluding self weight which can be supported through out the length. Ixx = 2 3.9 106 mm4. [25] SECTION - II Q5) A traffic control post 2.50 m diameter is supported centrally by a 300 mm diameter reinforced concrete column. Allowing a live load of 1500 N/ mm2. Design the circular slab. Use M 25 concrete and Fe 415 steel. [25] OR Q6) Design a counter fort type retaining wall for the following data : Overall height of the wall = 7m. Unit weight of backfill = 1600 N/mm 3. Angle of repose of the soil = 35 . Surcharge angle = 15 . Spacing of counter fort = 3 m. Toe slab to be supported by front counter forts. Use M 20 concrete and Fe 415 steel. [25] Q7) Design an intze water tank of capacity 6,00,000 liters. The height of staging is 12 m up to the bottom of tank. The bearing capacity of soil is 120 kN/m2. Wind pressure intensity is 1.8 kN/m2. Use M 20 grade of concrete and Fe 415 grade of steel. [25] OR Q8) Design an exterior panel of 6 m 6 m of flat slab with suitable drop to support a live load of 4 kN/m2. The slab is provided with floor finish of 1 kN/m2. The floor system is supported by column of size 500 mm 500 mm. Floor to floor distance is 3.5 m. Use M 20 grade of concrete and Fe 415 grade of steel. [25] #### [3764]-115 2

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Additional Info : April 2010 Examination - Advanced Structural Design (Elective II) (2003 Course)
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