Design of Steel Structures — Summer 2022

In what sense the force due to wind and those produced by earthquake on structure are different?

Derive the Resultant force in Bolted Bracket Connection Type II with neat sketches.

Calculate the design wind pressure and design forces on the hoarding 10 m long and 5m high (as shown in Fig 1), to be fixed at the roof of a 24m high building near Connaught Palace, New Delhi. The base of the hoarding board is 2.0m above the roof level. lattice tower located on the outskirts of Allahabad. Estimate also the wind load in terms of the effective frontal area for the tower. lattice tower located on the outskirts of Allahabad. Estimate also the wind load in terms of the effective frontal area for the tower. Fig 1

Why is the plastic method of design more useful for redundant structures than the determinate structures?

Evaluate the collapse load for the cantilever shown in Fig. 2. Fig 21

Explain the Plastic Hinge concept. Obtain the length and profile of plastic hinge for simply supported beam subjected to a uniformly distributed load.

Abeam fixed at both the ends is subjected to uniformly distributed load Won its right half portion as shown in Fig. 3. Determine the collapse load if the beam has uniform cross section. Fig

Differentiate between surge load and drag load as applied to gantry girders carrying cranes.

Explain the design procedure of Plate Girder.

Design a seat connection for a factored beam end reaction of 110 kN. The beam section is ISMB 250 @ 365.9 N/m connected to the flange of column section ISHB 200 @ 365.9 N/m using bolted connections. Steel is of grade Fe 410 and bolts of grade 4.6.

What are external and internal wind pressure co-efficient. Give codal provision for internal wind pressure co-efficient for a building.

What is diagonal tension field theory? How does pure tension field concept differ from incomplete tension field in plate girders?

Determine the safe load Pthat can be carried by the joint shown in Fig. 4. The bolts used are 20 mm diameter of grade 4.6. The thickness of the flange of I-section is 9.1 mm and that of bracket plate 10 mm. Fig

Explain the load factor, shape factor and collapse load.

What is a foot over bridge? What is the popular geometry of the foot over bridge?

Design a welded plate girder 24 m in span and laterally restrained throughout. It has to support a uniform load of 100 kN/m throughout the span exclusive of self-weight. Design the girder without intermediate transverse stiffeners. The steel for the flange and web plates is of grade Fe 410. Yield stress of steel may be2 assumed to be 250 MPa irrespective of the thickness of plates used. Design the cross section only.

Agantry girder is to be used in an industrial building carrying a manually operated overhead travelling crane, for the following data: Crane capacity 200 kN; Self-weight of the crane girder excluding trolley 200 kN; Self-weight of the trolley, electric motor, hook, etc. 40 kN; Approximate minimum approach of the crane hook to the gantry girder 1.20 m; Wheel base 3.5 m; c/c distance between gantry rails 16 m; c/c distance between columns (span of gantry girder) 8 m; Self- weight of rail section 300 N/m; Diameter of crane wheels 150 mm; Steel is of grade Fe 410.

Evaluate the Maximum shear forces and lateral forces in gantry girder.

What are risk co-efficient, terrain factor and topography factor ?

Explain simple post critical method to evaluate shear strength of web of plate girder as per IS 800:2007

Analysis a steel foot bridge for the following data: Type of truss: Pratt Span: 35 m Width of walk way: 3 m, Truss height = 3.5 m Flooring: RCC slab 120 mm with finishing 20 mm thick. Live Load: 5 kN/m2 Assume Suitable data if required .

What are the components of Truss Girder Bridges?

Explain the following connections with neat sketches: beam to beam web angle connection, beam to column flange seat angle connection

Asimply supported welded plate girder of span 25 m is subjected to service load of 60 kN/m UDL and two fixed point loads of 250 kN each spaced at 8.5 m from each supports. Design stiffener under concentrated load for plate girder. Apply curtailment of flanges.