Design of Steel Structures (CE-801) - Important Questions

Differentiate between bearing type bolts/connections and friction grip/type bolts/connections, including failure mechanisms in bolted connections.

Design the welded joint of an angle / channel tie member to a gusset plate to resist factored load or full member strength.

Explain the failure modes/patterns of bolted joints/connections

Explain why steel is considered superior to cast iron and wrought iron for structural applications.

What is a pin connection? List some of the pin connections used in steel structures.

Explain the limit state method and section classification used in steel structure design.

Determine the design strength of a given fillet weld subjected to a factored load.

Determine the minimum overlap / weld length for a flat tie bar lap welded to a plate for a given factored pull.

Calculate the number of bolts required in a lap joint to transmit a given factored load.

Calculate the strength of a 20 mm diameter grade 4.6 bolt in lap joint with 12 mm main plates.

Calculate the strength of a 20 mm diameter grade 4.6 bolt in single cover butt joint with 10 mm cover plate.

Design a bolted unstiffened seat angle connection for a beam to column flange for a given factored end reaction.

Explain block shear failure.

Explain what a lug angle is and its purpose in a tension member connection, with sketch.

Design a double-angle tension member (back-to-back / on either side of gusset) to carry a given factored axial tensile load, including bolt selection and slenderness check.

A steel plate of width 180 mm and thickness 12 mm is connected by bolts using two holes of diameter 20 mm. Calculate the net sectional area of the plate.

Explain the design considerations for compression members and the effect of slenderness ratio.

A steel tie member consists of an ISA section carrying a tensile force of 200 kN. Determine the required gross area assuming permissible tensile stress as 150 MPa.

Design a single-angle tension member for a roof truss to carry a given factored tensile force with possible stress reversal.

Design a double-angle discontinuous strut back-to-back with tack bolts to carry a given factored load over a given length.

Determine the design axial compressive load capacity of a given ISHB column section with pinned ends and given length.

Determine the design tensile strength of a flat plate tension member with bolt holes given yield and ultimate strengths.

Explain the factors effecting strength of tension members.

With the help of suitable diagram, explain the concept of shear lag.

Distinguish between laterally restrained and laterally unrestrained beams/sections.

Design a laterally supported / restrained simply supported steel I-beam carrying slab / UDL loads.

Explain lateral torsional buckling in steel beams and methods to improve beam stability.

Calculate maximum bending moment for a simply supported beam with UDL and state lateral support condition for design.

Explain the design principles of plate girders and the role of stiffeners.

Explain the steps for the design of laterally supported beams.

Design a laterally supported beam of given span for given bending moment and shear force.

Design a welded simply supported plate girder for given span and uniformly distributed load.

Explain the concept of laterally restrained beams with diagram.

Illustrate the different elements/components of a plate girder.

Design a slab base (base plate) for a steel column e.g. ISHB 200 carrying an axial (factored) load resting on concrete pedestal

Design a laced built-up column with two channel sections to carry a given axial (factored) load over a given effective length with hinged end conditions, including single lacing system.

A steel column carries an axial load of 900 kN. Determine the required area of base plate if allowable bearing pressure on concrete is $4\, N/mm^2$.

Differentiate between laced columns and battened columns with neat sketches.

Design a gusseted base for a column ISHB350 @ 710 N/m with two plates 450 mm d7 20 mm carrying a factored load of 3600 kN. The column is to be supported on concrete pedestal to be built with M20 concrete.

Design a grillage foundation with I-sections, for a column having a load of 5000 kN. Column is provided with a base plate of size 700 mm d7 800 mm. Take the bearing capacity of the soil as 200 kN/m$^2$. Assume any missing data.

A column section ISHB 250@ $500.3\text{ N/m}$ carries an axial load of $600\text{ kN}$. Design the column splices.

Mixed short questions including advantages of wide flange beams, difference between lacing and battens, types of base plates, and types of groove welds vs fillet weld.

Design an I-section / channel purlin on a sloping roof truss for given dead, live and wind loads, truss spacing and purlin spacing.

Write short notes on any two :

Explain different types of roof trusses and criteria for their selection in industrial buildings.

Calculate the maximum bending moment in a roof purlin of given span under given uniformly distributed roof load.

Write short note on: i) Types of roof trusses, ii) Purlins, iii) Profile of gantry girder section, iv) Deflection limits of gantry girders

Draw a neat sketch of a steel roof truss showing its various components and explain the components.

Design a roof truss using angle sections for given span, truss spacing and loads.

Write a note on grouping of timber based on modulus of elasticity and extreme fiber stress as per IS 883: 1994.