20CE3021 Analysis and design of precast concrete structures 3 0 0 3

3. Robert T. Ratay, “Structural Condition Assessment” Wiley, 2005 4. R. Dodge Woodson,”Concrete structures, protection repair and rehabilitation,” Butterworth-

Heinemann , 2009 5 Mark G. Alexander, Hans-Dieter Beushausen, Frank Dehn, “Concrete Repair, Rehabilitation and

Retrofitting ”, CRC Press, 2008

Recommended by Board of Studies

Approved by Academic Council 12th September 2020

Course code FRACTURE MECHANICS OF CONCRETE STRUCTURES L T P C 20CE3017 3 0 0 3 Course Objective:

1. To understand of the types of cracks 2. To impart knowledge on crack models 3. To apply damage mechanics for concrete

Course Outcome:

At the end of the course students will be able to 1. Classify the various types of cracks 2. Comprehend the fundamentals of fracture mechanics 3. Identify the cracking of concrete structures based on fracture mechanics. 4. Implement stress intensity factor for notched members 5. Apply fracture mechanics models to high strength concrete and FRC structures. 6. Ascertain the associated and non-associated flow cracks

Module: 1 BASICS OF FRACTURE MECHANICS: 7 Hours

Fundamentals of fracture mechanics – types of cracks – stress intensity factor - Crack in a structure Mechanisms of fracture - crack growth

Module: 2 STRUCTURAL CRACKS: 7 Hours Crack in a structure - mechanisms of fracture in structural concrete - crack growth - cleavage fracture ductile fracture - fatigue cracking - environment assisted cracking - service failure analysis

Module: 3 STRESS AT CRACK TIP: 8 Hours

Stress at crack tip - linear elastic fracture mechanics, Griffith’s criteria - stress intensity factors - crack tip plastic zone - Erwin’s plastic zone correction - R curves – compliance - concept of CTOD and CMD

Module: 4 MATERIAL MODELS: 8 Hours

General concepts –Material models -crack models -band models -models based on continuum damage mechanics - modeling of quasi brittle materials

Module: 5 APPLICATIONS: 8 Hours

Applications to high strength concrete - fibre reinforced concrete - crack concepts – numerical modeling

Module: 6 NONLINEAR FRACTURE MECHANICS: 7 Hours

Discrete crack concept - Smeared crack concept - Size effect - Plasticity models for concrete –Associated and non-associated flow - Failure surfaces for quasibrittle materials - Crack tip element finite element model for crack tip

CIVIL ENGINEERING (2020)