Design of Steel Structures Notes (DSS Notes)
These Design of Steel Structures Notes (DSS Notes) has been written by Mr. Sachin Kataria. He obtained his M.tech (Structure Analysis) degree form NIT Kurukshetra in 2016 ( a gold medalist in his batch). Then he appeared in GATE-2017 and secured an all India rank (AIR) of 199.
Pedagogical Features of our Design of Steel Structures Notes (DSS Notes)
- Numerious Solved Examples distributed across the text aid the reader in grasping the concepts.
- Solved Conceptual Problems given at the end of the notes to help students to revise and consolidate the concepts.
- Multiple choice questions helps students to have a quick revision of the concepts discussed in the chapter.
- Previous years exam questions solutions are provides at the end of the book it helps students to improve their analytical and design skills.
- A concise summary provided at the end of each chapter and underlines the important concepts learnt in the chapter.
- A glossary of important terms provided at the end of the notes helps students memories them accurately.
Chapter wise Details of our Design of Steel Structures Notes (DSS Notes)
Frist Chapter : In this chapter we discusses about characteristics and loads on structures. An introduction to types of rolled steel sections and their classification based on local buckling of the constitute elements is presented. The various methods of design of steel structures are introduces.
Chapter 2 : This chapter deals with the concepts of plastic analysis and design of beam and frames.
Chapter 3 : This chapter deals with the fundamentals of limit states of design of steel structures, the basis of partial load factors.
Chapter 4 : This chapter deals with the design of simple bolted connections. Both the bearing types and slip resistant connections are described. The effect of prying action is discussed. A brief note about riveted connections and design of pins is also presented.
Chapter 5 : Design of simple welded connections is described in chapter 5.
Chapter 6 : In this chapter the design of tension members is presented. The possible mode of failures and design against them are discussed. Share leg phenomenon and concept of net area and effective net area are also explained.
Chapter 7 : This chapter is about the design of axially loaded compression members. Design of
struts , Columns and built-up columns is discussed.
Chapter 8 : This chapter deals with the design of beams.
Chapter 9 : The design of beam-columns, the members subjected to axial load and bending moments, are discussed in chapter 9.
Chapter 10 : The design of column bases and caps are presented in chapter 10 and Design of plate girder and gantry girder are also discussed.
For Download Design of Steel Structures Notes – Click Here
We analyses the last ten years question paper of various competitive exams . A rough breakup of questions of various topics in the last ten years of competitive exams is as follows:
No. of Questions
Materials & Specifications
Riveted Joints & Bolted Joints
Compression members Columns Bases and Column Splices
Important topics of Design of Steel Structures for various exams.
Plastic Analysis, Design of Tension Member, Beams, Capacity & Design of rivet & weld joints.
Topics of Design of Design of Steel Structures Notes
- Plastic Analysis: Introduction, Stress-Strain Curve, Shape Factor, Load Factor, Plastic Collapse, Principle of virtual work, Theorems of plastic analysis.
- Bolted, Riveted and Welded connections : Type of Joint, Strength of joint, Efficiency of joints, Unwin’s formula, maximum pitch of rivets/bolts, Types of welded joints – specifications – design requirements.
- Tension members : Design Strength, Lug Angles, Splices, Displacement, Effective net area, Net sectional area.
- Compression members: Slenderness ratio, Effective length, Buckling, Design Strength, Design of Lacing, Batten, Column Formula, Euler’s critical load & stress, Column bases & Splicing.
- Beams: Bending strength of beam, Shear strength of beam, web buckling, Deflection , Built-up beams, Web Crippling, Bending strength, Purlins.
- Plate & Gantry Griders : elements, economical depth, design of main Section, connections between web and ﬂange, design of stiffness bearing, intermediate stiffeners, Design of Web splica & Flange splica.
- Roof Truss : Types , layout, Load on roof truss, Load combinations , Deflections, End Bearings, Bracing of truses.
Some Important terms use in Design of Steel Structures.
Sag Rods : Steel rods that are used to provide lateral support for purlins or for connecting principal ties of roof truss.
Rafter : Principal compression member in a roof truss supporting roofing.
Purlins : Beams that span between trusses to support roofing and roof loads.
Shape Factor : The ratio of the plastic moment of a section to its yield moment.
Shear Centre : The point of the cross section of a beam through which the resultant of the transverse loads must pass so that no torsion will occur.
Shear lag : A non-uniformity of stress in the parts of rolled or built-up sections occurring when a tensile load is not applied uniformly. It is the in-plane shear deformation effect by which the concentrated forces tangential to the surface of a plate gets distributed over the entire section perpendicular to the load over a finite length of the plate along the direction of the load.
Slender Section : A member that will buckle locally while the stress still is in the elastic range.
Spandrel Beam : Beams that support the exterior walls of buildings.
Stanchion : Column used in steel buildings.
Strut : A compression member in a truss or bracing system.
Tie : A tension member in truss or bracing system.
Base Plate : A plate provided below the column to transfer column loads to the concrete pedestal supporting the column.
Beam : A member that supports loads transverse to its longitudinal axis.
Bearing Plate : A plate provided below a beam or truss ends to transfer its end reactions to the masonry wall or column.
Block Shear : A fracture type shear failure where fracture may occur on either the tension plane or the shear plane followed by yielding on the other plane.
Buckling : Instability of the compression members characterized by their deflection in their own plane.
Built-Up section : A member fabricated by interconnecting more than one element to form a compound section acting as a single member.
Characteristics Loads: Self weight and other specified loads by the code of practice.
Coping : The cutting back of the flanges of a beam to facilitate its connection to another beam.
Effective Length : The distance between points of contra flexure in a compression member.
Euler Load : The compressive load at which a long and slender member will buckle elastically.
Factor of Safety : A factor by which the yield stress of the material of a member is divided to arrive at the permissible stress in the materials.
Accidental Loads : Load due to explosion, impact of vehicles or other loads.
Buckling Strength : Force or moment which a member can withstand without buckling.
Buckling Load : The load at which a straight compression member assumes a deflected position.
Column : A structural member in vertical position whose primary function is to support compressive loads.
Eyebar : A pin-connected tension member whose ends are enlarged with respect to the rest of the member so as to make the strength of the ends approximately equal to the strength of the rest of the member.
Fastner : A term representing bolts, welds, rivits, or other connecting devices.
Joists : beams supporting the floors and roofs of buildings.
Lintel : Beam over openings in masonry walls such as windows ans doors.
Net Area : Gross cross-sectional area of a member minus any holes or other indentations.
Partial Safety Factors : Factors to account for variability in the loads and material properties. These are normally greater than unity by which either the loads are multiplied or the resistances are divided to obtain design values.
Pitch : The longitudinal spacing of fasteners measured parallel to the long direction of a member or parallel to the direction of stress in the member.
Ponding : A situation on a flat roof where water accumulates faster than it runs off.
Slip Resistance: Limit shear that can be applied in a friction grip connection before slip occurs.
Stringers : The beams in bridge floor that run parallel to the rail or roadway.
Stiffener : A plate or an angle usually connected to the web of a beam or girder to prevent the out of plane deformations of plates.
Upset Rods : Rods whose ends are made larger than the regular body of the rod.
For Download Design of Steel Structures Notes – Click Here