The document provides details for seven design problems related to structural engineering.
(1) Design a reinforced concrete circular groundwater tank that is 12m in diameter, 4m tall with 200mm thick cylindrical walls.
(2) Design the conical dome of an intze tank given various dimensional parameters and a vertical load of 74kN/m.
(3) Design a reinforced concrete slab culvert for a national highway with specified dimensions and loadings.
The document provides details for seven design problems related to structural engineering.
(1) Design a reinforced concrete circular groundwater tank that is 12m in diameter, 4m tall with 200mm thick cylindrical walls.
(2) Design the conical dome of an intze tank given various dimensional parameters and a vertical load of 74kN/m.
(3) Design a reinforced concrete slab culvert for a national highway with specified dimensions and loadings.
The document provides details for seven design problems related to structural engineering.
(1) Design a reinforced concrete circular groundwater tank that is 12m in diameter, 4m tall with 200mm thick cylindrical walls.
(2) Design the conical dome of an intze tank given various dimensional parameters and a vertical load of 74kN/m.
(3) Design a reinforced concrete slab culvert for a national highway with specified dimensions and loadings.
The document provides details for seven design problems related to structural engineering.
(1) Design a reinforced concrete circular groundwater tank that is 12m in diameter, 4m tall with 200mm thick cylindrical walls.
(2) Design the conical dome of an intze tank given various dimensional parameters and a vertical load of 74kN/m.
(3) Design a reinforced concrete slab culvert for a national highway with specified dimensions and loadings.
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MTT / BE-8 / C / 20.03.2013 / S P.T.O.
B.E. 8th Semester (Civil) -:: 2 ::-
Subject: STRUCTURAL ENGINEERING DESIGN - IV (d) The internal diameter of a RCC circular ground water tank is 12 m Time: 2 Hrs. Maximum Marks: 50 and the height of tank is 4 meters. The thickness of the cylindrical wall is 200 mm. The wall of the tank is free at top and restrained at Note: Attempt any two parts from Q. 1 worth 2.5 marks each; attempt any three parts from Q. 2 worth 15 marks each. Use of IS 456, IS 3370, IRC 6 and IRC 21 is permitted. the base. Design the tank by approximate method or by IS Code Draw neat sketches as and when required. Assume grade of concrete as M20 & method. Grade of steel as Fe415, unless mentioned otherwise. Assume suitable data if (e) An intze tank has the following dimensions: Diameter of cylindrical required and mention it clearly. portion = 14 m; Rise of top dome = 2.0 m; Diameter of bottom dome Q. 1. Attempt any two (2.5 x 2 =5) (a) Sketch the reinforcement details in a typical combined trapezoidal = 8.5 m; Rise of bottom dome = 2.0 m; Height of cylindrical wall = footing? 5.5 m; Height of conical dome = 2.8 m; Thickness of top & bottom (b) What do you mean by a buttress retaining wall? dome = 75 mm & 250 mm respectively; thickness of conical dome = (c) What do you mean by membrane and continuity analysis of a water 400 mm. Design the conical dome of the tank (ignoring the effects tank? due to continuity), if the vertical load from top dome, top ring beam, (d) Indicate the different components of superstructure of a T-beam cylindrical wall & middle ring beam is 74 kN/m. bridge? (f) Design an reinforced concrete slab culvert for a National Highway, (e) What is the minimum grade of concrete for pretensioned and post tensioned prestressed concrete structures? for a two lane carriageway, to suit the following data: Footpaths on Q. 2. Attempt any three (15 x 3 = 45) either side: 1.0 m; clear span of slab culvert: 6.0 m; Average (a) Two columns of 300 mm x 300 mm carry unfactored loads of 700 kN thickness of wearing coat: 80 mm; Width of supports: 0.4 m; and 900 kN. The spacing between the centres of two columns is 3.0 Loading: IRC class AA (tracked vehicle) or IRC class AA (wheeled m. The width is to be restricted to 2.4 m. Find out the effective depth vehicle) or IRC class A. of footing from bending moment and punching shear considerations. (g) A simply supported pre-stressed concrete beam of rectangular cross Take SBC of soil as 150 kN/m2. section 400 mm x 600 mm carries a uniformly distributed load of 60 (b) The total height from the bottom of base slab to the top of horizontal kN/m over a span of 6m. Compute the stresses at the top and bottom earth backfill of a cantilever retaining wall is 4.0 m. The width of heel fibres at the mid span and end sections, if the pre-stressing force is slab, toe slab and base slab are 1.2 m, 0.9 m and 0.3 m respectively. 1920 kN. The tendon is parabolic with zero eccentricity at the ends Thickness of retaining wall at the bottom & top is 0.3 m & 0.2 m. The and 100 mm at the midspan. SBC of soil is 100 kN/m2. The coefficient of friction between soil and (h) (i) What are the advantages and disadvantages of pre-stressed concrete may be assumed as 0.50. Angle of internal friction Ф = 30°. concrete structures over reinforced concrete structures? Density of earth = 18 kN/m 3. A shear key of 300 mm x 300 mm is (ii) Explain why high strength materials are used in pre-stressed provided at a distance of 0.9 m from the toe. Check the stability of the concrete structures? wall against overturning and sliding and design the shear key. (c) Design the heel slab of a counterfort retaining wall for flexure, if: height from the bottom of base slab to the top of horizontal earth backfill = 8.0 m; width of heel slab = 2.0 m; width of toe slab = 1.7 m; thickness of base slab = 0.3 m; thickness of retaining wall at top and bottom = 0.3 m; SBC of soil = 180 kN/m 2; coefficient of friction between soil and concrete = 0.50; angle of internal friction Ф = 30°; density of earth = 18 kN/m3; clear spacing of counterforts = 3.0 m; thickness of counterforts = 0.5 m.