Praveen Nagarajan completed his civil engineering education from NIT Calicut and IIT Madras. He was a top-ranking student throughout. After a brief stint as Bridge design Engineer at L&T Ramboll, Chennai, he took to academics. His research interests include reinforced and prestressed concrete, bridge engineering, and structural reliability. He has published more than 50 technical papers in these areas and authored the book Prestressed Concrete Design (published by Pearson). He is the recipient of several awards like the Valli Anantharamakrishnan Merit Prize from IIT Madras, E P Nicolaides Prize from the Institution of Engineers (India), the Best Young Teacher award from NIT Calicut, ICI-UltraTech Award for Outstanding Young Concrete Engineer of Kerala by the Indian Concrete Institute (ICI), and ICI-Prof. V. Ramakrishnan Young Scientist Award by the ICI. He has guided two PhD students and more than 35 M-Tech projects. He is also guiding eight research scholars for their doctoral degrees. Currently, he is working as an Associate Professor in the Department of Civil Engineering at National Institute of Technology Calicut, India.

• 1. Introduction 2. Flexibility and Stiffness: Characteristics of Structures 3. Flexibility Method 4. Stiffness Method 5. Direct Stiffness Method

Praveen Nagarajan completed his civil engineering education from NIT Calicut and IIT Madras. He was a top-ranking student throughout. After a brief stint as Bridge design Engineer at L&T Ramboll, Chennai, he took to academics. His research interests include reinforced and prestressed concrete, bridge engineering, and structural reliability. He has published more than 50 technical papers in these areas and authored the book Prestressed Concrete Design (published by Pearson). He is the recipient of several awards like the Valli Anantharamakrishnan Merit Prize from IIT Madras, E P Nicolaides Prize from the Institution of Engineers (India), the Best Young Teacher award from NIT Calicut, ICI-UltraTech Award for Outstanding Young Concrete Engineer of Kerala by the Indian Concrete Institute (ICI), and ICI-Prof. V. Ramakrishnan Young Scientist Award by the ICI. He has guided two PhD students and more than 35 M-Tech projects. He is also guiding eight research scholars for their doctoral degrees. Currently, he is working as an Associate Professor in the Department of Civil Engineering at National Institute of Technology Calicut, India.

• 1. Introduction 2. Flexibility and Stiffness: Characteristics of Structures 3. Flexibility Method 4. Stiffness Method 5. Direct Stiffness Method

Praveen Nagarajan completed his civil engineering education from NIT Calicut and IIT Madras. He was a top-ranking student throughout. After a brief stint as Bridge design Engineer at L&T Ramboll, Chennai, he took to academics. His research interests include reinforced and prestressed concrete, bridge engineering, and structural reliability. He has published more than 50 technical papers in these areas and authored the book Prestressed Concrete Design (published by Pearson). He is the recipient of several awards like the Valli Anantharamakrishnan Merit Prize from IIT Madras, E P Nicolaides Prize from the Institution of Engineers (India), the Best Young Teacher award from NIT Calicut, ICI-UltraTech Award for Outstanding Young Concrete Engineer of Kerala by the Indian Concrete Institute (ICI), and ICI-Prof. V. Ramakrishnan Young Scientist Award by the ICI. He has guided two PhD students and more than 35 M-Tech projects. He is also guiding eight research scholars for their doctoral degrees. Currently, he is working as an Associate Professor in the Department of Civil Engineering at National Institute of Technology Calicut, India.

• 1. Introduction 2. Flexibility and Stiffness: Characteristics of Structures 3. Flexibility Method 4. Stiffness Method 5. Direct Stiffness Method