# BRIDGE ENGINEERING (18CV821)

## BRIDGE ENGINEERING

#### Course Learning Objectives: This course will enable students to understand the analysis and design of concrete bridges.

Note: All designs have to be done by Working Stress Method

### Module -1

Introduction to bridges, classification, selection of bridge site and preliminary and detailed survey work
computation of discharge, linear waterway, economic span, afflux, scour depth. Design loads for bridges, introduction to I.R.C. loading standards, Load Distribution Theory, Bridge slabs, Effective width, Introduction to methods as per I.R.C.

### Module -2

Design of Slab Bridges: Straight and skew slab bridges.

### Module -3

Design of T beam bridges(up to three girder only) Proportioning of components, analysis of slab using IRC Class AA tracked vehicle, structural design of slab, analysis of cross girder for dead load & IRC Class AA tracked vehicle, structural design of cross girder, analysis of main girder using Courbon’s method, calculation of dead load BM and SF, calculation of live load B M & S F using IRC Class AA Tracked vehicle. Structural design of main girder.

### Module -4

Other Bridges: Design of Box culvert (Single vent only). Design of Pipe culverts.

### Module -5

Substructures - Design of Piers and abutments, Introduction to Bridge bearings, Hinges and Expansion joints.(No design).

#### Course outcomes: After studying this course, students will be able to:

1. Understand the load distribution and IRC standards.
2. Design the slab and T beam bridges.
3. Design Box culvert, pipe culvert
4. Use bearings, hinges and expansion joints and
5. Design Piers and abutments.

#### Question paper pattern:

• The question paper will have ten full questions carrying equal marks.
• Each full question will be for 20 marks.
• There will be two full questions (with a maximum of four sub- questions) from each module.
• Each full question will have sub- question covering all the topics under a module.
• The students will have to answer five full questions, selecting one full question from each module.

#### Textbooks:

1. Johnson Victor. D, “Essentials of Bridge Engineering”, Oxford Publishing Company.
2. N Krishna Raju, “Design of Bridges, Oxford and IBH publishing company
3. T R Jagadeesh and M A Jayaram, “Design of bridge structures”, Prentice Hall of India

#### Reference Books:

1. Jain and Jaikrishna, “Plain and Reinforced Concrete”, Vol.2.,Nem Chand Brothers.
2. Standard specifications and code of practice for road bridges, IRC section I,II, III and IV.
3. “Concrete Bridges”, The Concrete Association of