Design of Industrial Structures — Winter 2021

Give the classification of industrial chimneys.

How the total height of a transmission line tower is calculated? Explain in brief the factors governing the height of transmission line tower. Aroof truss is having the following data:  Span of the truss : 18m  C/c spacing of truss: 3.5m  Column Height : 8m  Location of building : Jaipur  Allowable SBC of soil: 170 kN/m2

Differentiate between Bunker and Silos

Analyze and Design purlin for the above data.

Fix the configuration of a roof truss for span 18 m for an industrial building.

Compute nodal forces due to dead load, live load and wind load as per IS: 875.

Analyze truss and design main tie for the above data.

Acylindrical silo has an internal diameter of 6 m and 20 m deep (cylindrical portion) with a conical hopper bottom. The material stored is wheat with density of 8 kN/m3. The coefficient of friction between wall and material is 0.444. The ratio of horizontal to vertical pressure is 0.40. Angle of repose is 25 degree. Design the reinforcements in the walls of silo. Adopt M20 and Fe415 grades. Adopt Janssen’s theory for pressure calculations.

Explain various types of loads acting on the transmission line towers. Under What circumstances torsional load occur on them?

Design a circular bunker to store 20 tonnes of coal. Density of coal is 9 kN/m3 and angle of repose is 30 degree. Use limit state method of design and adopt grades M20 and Fe 415. Show reinforcement detailing with neat sketch.

Enlist the different types of communication towers based on their structural action.

Density of brick lining = 20 kN/m3

Temperature difference = 70 °C

Coefficient of thermal expansion = 11 x 10-6 / °C

Es=210 x 103N/mm2

M35 grade of concrete and Fe 415 grade steel

Design a gantry girder for the following data: Capacity W (kN) 170 Weight of crane girder (kN) 120 Wheel spacing (mm) 2400 Weight of rail (kN/m) 0.651 Weight of crab (EOT) (kN) 50 Edge distance (mm) 1100 Span of gantry girder (Lm) 8.0 Span of crane (m)

Design a chimney of height 100 m and check the stresses at base in bars. Data given:

Agrid floor has 120 mm thick slab, floor finish =1.2 kN/m2 , live load 3.8 kN/m2 is provided for a hall with overall dimensions of 24 m x 24 m c/c with wall on outer periphery only and 5 interior beams in both direction forming a slab panel of size 4m x 4m. Assume all beams of size 300 x1200mm (including slab thickness). Design and detail reinforcement in central beam of 24 m long. Use Rankine Grashoff Method.

Explain the differences in analysis of bunker wall and silo wall.

Areinforced concrete chimney 50 m high above ground has an outside diameter of 4 m. The thickness of the shell is 20 cm throughout. Vertical steel is taken as 1 % of the cross sectional area throughout. The total wind load above the base may be taken as 200 kN. Find the stresses developed due to wind and dead load at the base of chimney. Assume modular ratio =13.

What are the checks to be carried out for stability analysis of foundation of a chimney? Explain any one in detail.