Course

Design of Steel Structures

Indian Institute of Technology Guwahati

This course, "Design of Steel Structures," offers a thorough exploration of various topics essential for understanding steel structure design:

  1. Introduction: Properties of Structural Steel, I. S. Rolled Sections, I. S. Specifications.
  2. Design Approach: Factor of Safety, Permissible and Working Stresses, Elastic Method, Plastic Method, Introduction to Limit States of Design.
  3. Connections: Types of connections, including Riveted, Bolted, and Welded Connections, along with their strengths, efficiencies, and design of joints.
  4. Tension Members: Focused on net sectional area, permissible stress, and design considerations for axially loaded tension members.
  5. Compression Members: Covering modes of failure, buckling failure theories, effective length, and design formulas for compression members.
  6. Beams: Detailed design procedures for beam members, including built-up sections and considerations for web crippling and buckling.
  7. Beam Column: Addressing eccentricity of load and design procedures for eccentrically loaded base plates.
  8. Column Base: Examination of slab bases, gusseted bases, and grillage foundations.
Course Lectures
  • This module serves as an introduction to the design of steel structures, focusing on fundamental aspects essential for understanding structural steel properties and specifications.

    Key topics include:

    • Understanding the properties of structural steel.
    • Familiarization with Indian Standard (I.S.) rolled sections.
    • A review of I.S. specifications related to steel structures.

    Students will gain insights into the foundational elements that form the basis for further advanced topics in steel structure design.

  • Mod-2 Lec-1 Connections
    Prof. Damodar Maity

    This module dives into the various approaches to design, emphasizing safety and efficiency in structural applications.

    Topics covered include:

    • Factors of safety and permissible stresses.
    • Elastic and plastic methods of design.
    • An introduction to limit states of design.

    Students will learn how to evaluate and apply these methodologies to ensure the reliability of steel structures under different loads and conditions.

  • Mod-2 Lec-2 Riveted Connections
    Prof. Damodar Maity

    This module focuses on connections, which are crucial for the integrity of steel structures. Understanding connection types and their design is key.

    Discussion points include:

    • Types of connections: riveted, bolted, and welded.
    • Evaluating strength and efficiency of various joints.
    • Identifying modes of failure, particularly in riveted joints.

    Students will also explore the advantages and disadvantages of each connection type and how to design them effectively.

  • Mod-2 Lec-3 Design of Rivet Joint
    Prof. Damodar Maity

    This module details the design process for riveted connections, providing students with a comprehensive understanding of how to effectively utilize rivets in steel structures.

    Key points include:

    • Design principles for rivet joint strength and efficiency.
    • Understanding load distribution in riveted joints.
    • Practical examples and calculations for designing riveted connections.

    Students will engage with real-world applications, enhancing their capability to implement riveted connections in various structural contexts.

  • Mod-2 Lec-4 Welding
    Prof. Damodar Maity

    This module introduces welding techniques, which are essential for creating strong, durable connections in steel structures.

    Topics include:

    • Types of welding commonly used in structural applications.
    • Benefits and challenges associated with welded connections.
    • Welding processes and quality control measures.

    By the end of this module, students will understand how to effectively design and implement welds for various structural scenarios.

  • This module focuses on the design of fillet and butt welds, which are critical components in ensuring the robustness of welded connections in structures.

    Key areas of study include:

    • Design considerations for fillet welds and butt welds.
    • Calculating the strength and efficiency of welds.
    • Understanding weld sizes and their implications on structural performance.

    Students will engage in exercises to solidify their understanding of how to design and analyze welds effectively for various steel applications.

  • Mod-2 Lec-6 Bolted Connection
    Prof. Damodar Maity

    This module focuses on bolted connections, a key aspect of steel structure design, where students will learn about:

    • Types of bolted connections and their applications in construction.
    • Design criteria and calculations for bolted joints.
    • Advantages and disadvantages of bolted connections compared to other types.
    • Practical examples showcasing the design process for bolted connections.

    Students will engage in exercises that reinforce their understanding of how to effectively design and analyze bolted connections in various structural scenarios.

  • In this module, students will explore eccentric connections in riveted joints, covering essential topics such as:

    • Definition and importance of eccentric connections in structural design.
    • Different types of riveted joints and their applications.
    • Analyzing the forces acting on eccentric connections.
    • Design methodologies for ensuring the integrity of riveted joints under eccentric loading.

    The module features case studies and design examples to help students grasp the complexities of eccentric connections effectively.

  • This module delves into the design of eccentric connections with loads lying in the plane of the joint, discussing:

    • The significance of load orientation in joint design.
    • Design principles specific to eccentric connections under in-plane loading.
    • Step-by-step design process ensuring the joint's strength and stability.
    • Real-world applications and examples illustrating the design process.

    Students will apply theoretical knowledge to practical scenarios, enhancing their ability to manage in-plane loading challenges in steel structures.

  • This module covers the analysis and design of eccentric connections where the load is perpendicular to the plane of a riveted joint, emphasizing:

    • Understanding the effects of perpendicular loading on joint performance.
    • Key design considerations to accommodate eccentric loads.
    • Methods to calculate the required strength and stability of the connection.
    • Practical examples demonstrating design applications.

    Students will engage in hands-on exercises that enhance their understanding of how to adapt designs for eccentric loading conditions effectively.

  • This module emphasizes the analysis and design of connections with seat configurations, covering topics such as:

    • The role of seat connections in steel structures.
    • Design guidelines for effective seat connections.
    • Challenges and solutions in the analysis of seat configurations.
    • Examples of seat connections used in real-world applications.

    Students will work through design exercises that highlight the importance of proper connection design in ensuring structural integrity.

  • Mod-3 Lec-5 Eccentric Connection
    Prof. Damodar Maity

    This module provides an overview of eccentric connections, exploring the following key aspects:

    • Definition and significance of eccentric connections in structural applications.
    • Different loading scenarios and their effects on connection design.
    • Design strategies to ensure stability and strength under eccentric loading.
    • Case studies to illustrate successful implementations of eccentric connections.

    Through a mix of theoretical knowledge and practical exercises, students will develop a comprehensive understanding of eccentric connection design.

  • This module covers the essential aspects of understanding the loads that act on weld joints, specifically focusing on fillet and butt welds.

    Key topics include:

    • Definitions and applications of fillet and butt welds.
    • Load scenarios and their effects on weld integrity.
    • Design considerations for effective weld joint performance.

    By the end of this module, students will be equipped with the knowledge to assess and design welded connections under various loading conditions.

  • Mod-4 Lec-1 Tension Member
    Prof. Damodar Maity

    This module introduces students to the fundamentals of tension members in steel structures, detailing their significance and applications.

    Topics include:

    • Definition and role of tension members in structural design.
    • Analysis of forces acting on tension members.
    • Design approaches and best practices for ensuring structural integrity.

    Students will gain insights into the behavior of tension members under various load conditions, preparing them for practical design challenges.

  • This module delves into the specific design criteria for tension members, focusing on the calculations necessary for their effective implementation.

    Key points include:

    • Calculating net sectional areas for various tension member configurations.
    • Determining permissible stress limits based on material properties.
    • Real-world applications of tension member design in projects.

    By the end of this module, students will be able to apply theoretical knowledge to design effective and safe tension members in various structures.

  • This module focuses on advanced topics in the design of tension members, particularly the integration of gusset plates, lug angles, and tension splices.

    Students will explore:

    • The role of gusset plates in enhancing the performance of tension members.
    • Design specifications for lug angles and their applications.
    • Tension splices and their importance in maintaining structural integrity.

    This comprehensive understanding will prepare students for real-world engineering challenges in steel construction.

  • This module aims to equip students with the skills needed to design tension members subjected to both axial loads and bending moments.

    The content includes:

    • Understanding the interaction of axial loads and bending in tension members.
    • Design methodologies that incorporate both loading conditions.
    • Case studies and practical examples for better comprehension.

    By the end, students will be prepared to tackle complex design scenarios involving combined loading in tension members.

  • Mod-5 Lec-1 Compression Member
    Prof. Damodar Maity

    This module introduces the concept of compression members, focusing on their design and the factors influencing their performance in structures.

    Topics covered include:

    • The definition and importance of compression members in structural frameworks.
    • Analysis of failure modes, including buckling and stability concerns.
    • Design parameters as specified by relevant codes and standards.

    Students will acquire essential knowledge for effectively designing compression members to ensure structural reliability.

  • This module focuses on the design of compression members in steel structures, exploring fundamental concepts and practical applications.

    Key topics include:

    • Understanding the modes of failure in columns
    • Introduction to buckling failure, including Euler's theory
    • Effective length and slenderness ratio
    • Application of design formulas as per I.S. codes
    • Design considerations for built-up compression members, including laced and battened columns

    Students will gain insights into the structural integrity and stability of compression members, which are crucial in ensuring safety in engineering designs.

  • This module emphasizes the design of eccentrically loaded tension members, crucial in various structural applications where loads are not aligned.

    Topics covered include:

    • Definition and characteristics of eccentrically loaded tension members
    • Calculating the effects of eccentric loading on tension members
    • Design considerations for ensuring member stability and strength
    • Real-world applications and case studies

    By the end of this module, students will be equipped to handle the complexities associated with eccentric loads in structural design.

  • This module covers the design of built-up compression members, focusing on various configurations and their structural implications.

    Key aspects include:

    • Understanding built-up sections and their advantages
    • Design methodologies for built-up compression members
    • Role of lacing systems in enhancing member performance
    • Evaluation of strength and stability in built-up configurations

    Students will learn how to optimize designs for efficiency while ensuring compliance with safety standards and codes.

  • This module focuses on the detailed design of built-up compression members, allowing students to apply theoretical knowledge to practical scenarios.

    Topics include:

    • Review of fundamental principles from previous modules
    • Advanced design techniques for built-up members
    • Case studies highlighting real-world applications
    • Hands-on design project to reinforce learning

    Students will complete this module with a robust understanding of how to design and analyze built-up compression members effectively.

  • This module introduces lacing systems for built-up compression members, detailing their design and function in enhancing structural performance.

    Key areas of focus include:

    • The importance of lacing in built-up members
    • Design methodologies for various lacing configurations
    • Analyzing the impact of lacing on member strength
    • Practical examples and design challenges

    Students will explore how effective lacing systems improve stability and load distribution in compression members.

  • This module focuses on the design of lacing systems for compression members, detailing their significance and applicability in engineering.

    Key topics include:

    • Overview of lacing systems and their structural roles
    • Design standards and guidelines for lacing
    • Calculating the effectiveness of lacing configurations
    • Hands-on practice with design problems

    Students will gain practical experience in designing lacing systems that enhance the performance and reliability of compression members.

  • This module focuses on the design of batten plates, which are crucial for connecting compression members in steel structures. Students will learn:

    • The purpose and application of batten plates in structural design.
    • How to determine the effective width of batten plates.
    • Design considerations for various loading conditions.
    • Common practices and standards outlined in IS codes.

    By the end of this module, students will gain a comprehensive understanding of how to effectively design batten plates for stability and strength in compression member applications.

  • This module introduces flexural members, specifically beams, and their critical role in structural design. Key topics include:

    • Understanding the types of beams and their applications in construction.
    • The importance of analyzing bending moments and shear forces.
    • Defining the characteristics of laterally supported vs. unsupported beams.
    • Design principles that ensure safety and stability of beam structures.

    Students will acquire foundational knowledge necessary for the successful design of beam members, ensuring they meet structural requirements.

  • This module delves into the design procedures for beam members, detailing a systematic approach to ensure structural integrity. Topics covered include:

    • The significance of load calculations and material selection.
    • Understanding the design process from initial concept to final implementation.
    • Key design codes and standards that govern beam design.
    • Common challenges faced during the design of beam members and solutions to overcome them.

    Students will learn to effectively apply theoretical knowledge to practical design scenarios, enhancing their engineering skills.

  • This module focuses on the design of laterally supported beams, which are essential for ensuring structural stability. Key elements include:

    • Identification of laterally supported conditions and their impact on beam performance.
    • Analysis of bending and shear in supported beams.
    • Design requirements and calculations for these beams.
    • Application of relevant design codes for safety and compliance.

    By completing this module, students will develop the skills needed to design effective laterally supported beams in various construction scenarios.

  • This module addresses the design of laterally unsupported beams, emphasizing their unique challenges and solutions. Key areas of focus include:

    • Understanding the implications of lateral unsupported conditions on beam behavior.
    • Analyzing critical buckling considerations.
    • Design techniques to enhance stability and strength.
    • Compliance with engineering standards and codes for unsupported beams.

    Students will gain insights into effectively addressing the complexities of designing laterally unsupported beams, preparing them for real-world engineering challenges.

  • Mod-6 Lec-5 Built-Up Beams
    Prof. Damodar Maity

    This module covers the design of built-up beams, which are critical for achieving specific load-bearing requirements in steel structures. Topics of discussion include:

    • The definition and purpose of built-up beams in structural applications.
    • Design principles for combining various steel elements into a single beam.
    • Considerations for loads, stresses, and connections in built-up designs.
    • Applicable standards and design codes for built-up beam construction.

    Students will finish the module with a robust understanding of how to design built-up beams that meet the demands of modern engineering projects.

  • This module covers the critical aspects of built-up beams, focusing on the curtailment of flange plates and shear connections. Students will learn:

    • The importance of curtailment in structural efficiency.
    • Design principles for flange plates.
    • Methods for analyzing shear connections.
    • Applications of built-up beams in various structural scenarios.

    By the end of this module, participants will have a comprehensive understanding of how to design and implement effective shear connections, ensuring structural integrity.

  • This module introduces the design of built-up beams. Key topics include:

    1. Defining built-up beams and their applications.
    2. Design considerations including load factors.
    3. Step-by-step procedures for calculating dimensions and materials.
    4. Comparative analysis with rolled sections.

    Through practical examples and case studies, students will enhance their ability to design effective built-up beam structures tailored to specific engineering requirements.

  • In this module, participants will delve into the design of shear connections and purlins. The curriculum includes:

    • Types of shear connections and their applications.
    • Design criteria to ensure safety and efficiency.
    • Case studies showcasing real-world applications.
    • Evaluation techniques for connection strength.

    This module aims to equip students with the knowledge to design robust shear connections and purlins that meet industry standards and project requirements.

  • Mod-7 Lec-1 Gantry Girders
    Prof. Damodar Maity

    This module provides an overview of gantry girders, essential components in various structural applications. Topics covered include:

    • Definition and purpose of gantry girders.
    • Load considerations and design methodologies.
    • Materials used in construction.
    • Real-world applications and case studies.

    By the conclusion of this module, students will understand how to design gantry girders that effectively support operational loads in different engineering projects.

  • This module focuses on the design aspects of gantry girders, emphasizing practical applications in engineering. Key learning points include:

    1. Design principles for gantry girders.
    2. Load analysis and distribution.
    3. Material selection and construction techniques.
    4. Case studies reflecting effective designs.

    Students will acquire the skills to create safe and efficient gantry girder designs tailored to specific load and environmental conditions.

  • This introductory module on plate girders covers fundamental concepts essential for understanding their structural behavior. Key topics include:

    • Definition and types of plate girders.
    • Design considerations and criteria.
    • Analysis of load-bearing capacities.
    • Common applications in engineering.

    By the end of this module, participants will have a foundational knowledge of plate girders and their role in various structural systems.

  • In this module, we continue our exploration of plate girders, delving deeper into their structural characteristics and design applications. Key topics include:

    • Understanding the role of plate girders in various constructions.
    • Detailed analysis of different types of plate girders and their uses.
    • Factors influencing the design of plate girders.

    Students will engage in practical examples to illustrate the concepts discussed, enhancing their knowledge of this critical component in steel structures.

  • This module focuses on the comprehensive design process of a plate girder. It covers:

    1. Initial considerations and assumptions for plate girder design.
    2. Step-by-step calculations for various load conditions.
    3. Safety factors and performance standards as per I.S. Codes.
    4. Verification of design through practical examples and case studies.

    Students will learn how to apply theoretical knowledge to real-world scenarios, ensuring their designs meet safety and efficiency requirements.

  • Mod-8 Lec-1 Column Base Part-1
    Prof. Damodar Maity

    In this module, we introduce the fundamental concepts of column bases, which are critical for transferring loads from columns to foundations. Key topics include:

    • Different types of column bases: slab base and gusseted base.
    • The significance of base design in structural stability.
    • Design considerations for various loading conditions.

    Students will analyze practical design scenarios to understand the implications of different base types on overall structure performance.

  • Mod-8 Lec-2 Column Base Part-2
    Prof. Damodar Maity

    This module continues the discussion on column bases, providing advanced insights and design methodologies. Key learning outcomes include:

    1. Detailed examination of the interactions between column bases and foundations.
    2. Design methodologies for grillage foundations and their applications.
    3. Practical examples of column base designs under various load scenarios.

    Students will engage in case studies to enhance their understanding of the complexities involved in designing effective column bases.