CE 304: Concrete Design - Spring 2023

• To learn the fundamentals of analyzing reinforced concrete structural members.
• To learn design of basic structural members of a reinforced concrete building.
• To learn overall structual design of a reinforced concrete building.

• Properties of concrete and steel.
• Design philosophies.
• Loads and load combinations.
• Analysis and design of beams, columns, slabs, stair case and shallow foundations.
• Ductile detailing.
• (if time permits: ) design of shear walls, seismic design.

• Reinforced Concrete Design - S Unnikrishna Pillai and Devdas Menon.
  • Respective sections from the book to be read `before' the class, will be mentioned against the lectures.

• Limit State Design of Reinforced Concrete Structures - P C Verghese.

• IS 456(2000): Plain and reinforced concrete - Code of Practice (BIS)
• SP 16(1980): Design aids for reinforced concrete to IS 456

• Good background in Mechanics of Solids.
• Good background in Structural Analysis.
• Curiosity to learn the fundamentals behind construction of some of the largest structures like Hoover Dam and Burj Khalifa.

• Please be considerate about everyone's time.
• In all emails pertaining to this course, please have "CE304" in the subject line.
  • (note that there is no space or hyphen or anything between CE and 304)

Cheating cases (assignments/codes/exams/project) will be dealt with in accordance with the Institute norms. It is expected that everyone will uphold the honor code.

All delays beyond the defined deadlines will attract reduction in marks as per the following curve. The reduction factor, \(R\) will be multiplied to the obtained marks. Mathematically, it is given by: \(R = \exp(-D^2)\), where \(D\) is the total delay in days (will be counted hourly, i.e. fractional days are possible).

Following will be the weightage of different components of assessment

• Tutorials will involve two types of problems:
  • Set A: to be submitted within the tutorial hour and will be graded towards Tutorial weightage
  • Set B: to be practiced outside the tutorial hour and will not be graded
• Assignments will entail analysis/design problems, practical problems, visit reports, etc.
• Exams will involve take home type analysis/design problems along with viva/presentations.
• Expect one assignment and tutorial per week.

It is important to develop the habit of self-learning. A number of reading assignments and self-exercises will be given during the course. These will not be formally graded and it will be expected that students will go through them on a regular basis on their own.

• {download} (Review tutorial) Stresses in beams and columns; buckling of columns.

• Behavior of composite beams
  • Assumptions of beam theory; centroid; neutral axis
  • Strain and stress distribution during bending of homegeneous and composite beams
  • Shear stresses in beams
  • Equivalent section and modular ratio
• Reading from the book: 4.2, 4.3, 6.2
• Problems given in class:
  • Finish the derivation of neutral axis location of the composite section
  • Calculate neutral axes locations of the two given composite sections (2 material and 3 material)

• Behavior of composite columns
  • Strains and stresses in columns under axial loads only (homogeneous and composite)
  • Effective length; slenderness ratio; buckling of columns
  • Strains and stresses in columns under combined axial and bending loads
• Reading from the book: 13.1.2, 13.2.1, 13.2.2
• {Mechanics Practice Problems}

• {T2 Set A}{T2 Set B}Analysis of beams and columns with composite section.

• Material behavior of concrete
  • Stress-strain behavior; elastic modulus and Poisson's ratio; modulus of rupture
  • Effects of confinement and creep
  • Grades of concrete
• Reading from the book: 2.8, 2.9, 2.10.3, 2.11.1, 2.11.2

• Mix design and characteristic strength.
  • Nominal mix vs. design mix
  • Characteristic strength

• Material behavior of steel.
  • Grades and types of steel
  • Manufacturing process of reinforcing steel
  • Stress-strain behavior
  • Prevention of corrosion

• Reading from the book: 2.7, 2.14

• {Assignment 1} - due on Jan 24.
• {T3 Set A}{T3 Set B} Concrete mix design; properties of concrete and steel.

• Mix design using IS 10262 and IS 456
  • Provisions of the code
  • Examples of mix design
  • Discussion on materials, workmanship, inspection and testing
  • Stress-strain behavior of steel

• Design philosophies
  • Working stress and ultimate load philosophy
  • Limit state method, limit states of strength and serviceability
  • Partial factors of safety
• Reading from the book: 3.1.2, 3.2, 3.3, 3.5, 3.6

• {Assignment 2} - due on 31 Jan.
• {T4 Set A} Design philosophies; probabilistic design ideas.

• Analysis of RC beams.
  • design stress-strain curves
  • analysis under flexure
  • analysis under service loads
• Reading from the book: 4.5, 4.7

• Analysis of RC beams.
  • design stress-strain curves
  • analysis under flexure
  • balanced, under-reinforced and over-reinforced sections
  • analysis at ultimate limit state; singly- and doubly-reinforced beams
• Reading from the book: 4.5, 4.7

• {Assignment 3} - due on 10 Feb.
• {T5 Set A}{T5 Set B} Analysis of RC beams.

• Analysis and design of RC beams.
  • behavior under shear
  • basic design process

• Design of RC beams
  • requirements of cover and spacing of bars
  • minimum and maximum reinforcement
  • deflection control (serviceability)
  • design of singly- and doubly-reinforced beams
  • Curtailment and bending of tension reinforcement
  • Behavior and design against shear
• Reading from the book: 5.2, 5.3, 5.5, 5.7
• Reading from the book: 5.9, 6.3, 6.4, 6.5, 6.7.6

• Examples on design of beams, discussion of exam questions

• {Assignment 4} - due on 21 Feb.
• {T6 Set A} Design of beams

• Test videos on behavior of RCC beams
  • Different modes of failure
  • Over-reinforced beam failure
  • Flexure failure
  • Flexure and shear failure
• Analysis and design of RC columns
  • effective length, braced vs. unbraced columns
  • limits on slenderness, minimum eccentricity and reinforcement
  • longitudinal and transverse reinforcement
  • design of short columns
• Reading from the book: 13.2.3, 13.3, 13.4

• {T7 Set A}{T7 Set B} Design of columns

• Design of columns
  • consideration of combined axial and bending loads
  • design of slender columns
• Reading from the book: 13.5, 13.6, 13.7

• {Assignment 5} - due on 3 Mar.

• Design of columns

• Design of columns
  • design of slender columns
• Reading from the book: 13.5, 13.6, 13.7

• Design of columns

• Design of RC slabs
  • one-way slabs
• Reading from the book: 5.6
• Design of RC slabs
  • two-way slabs
• Reading from the book: 11.6, 11.7, 11.8

• Design of RC slabs
  • two-way slabs
• Reading from the book: 11.1, 11.2 (except 11.2.6)

• Design of RC slabs

• Design of RC slabs.

• Design of RC slabs
  • two-way slabs
• Reading from the book: 11.3, 11.4, 11.5 (up to IS code recommendations)

• Types and analysis of shallow foundations.
• Analysis of shallow foundations.

• Analysis of shallow foundations.

• Analysis of shallow foundations.

• Design of shallow foundations.

• Design of shallow foundations.

• Design of shallow foundations.

• Design of RC buildings.

• Design of RC buildings.

• Design of RC buildings.

• Design of RC buildings.