18CV735 Masonry Structures syllabus for CV

Masonry Units, Materials, types and masonry construction:

Bricks, Stone and Block masonry unitsstrength, modulus of elasticity and water absorption of masonry materials–classification and properties of mortars. Defects and Errors in masonry construction – cracks in masonry, types, reason f o r cracking, methods of avoiding cracks.

Strength and Stability:

Strength and stability of axially loaded masonry walls, effect of unit strength, mortar strength, joint thickness, rate of absorption, effect of curing, effect of ageing, workmanship. Compressive strength formulae based on elastic theory and empirical formulae.

Permissible stresses:

Types of walls, permissible compressive stress, stress reduction and shape modification factors, increase in permissible stresses for eccentric vertical and lateral load, permissible tensile stress and shear stresses.

Design Considerations:

Effective height of wall sand columns, openings in walls, effective length, effective thickness, slenderness ratio, eccentricity, load dispersion, arching action in lintels. Problems on design considerations for solid walls, cavity walls, wall with pillars.

Load considerations and design of Masonry subjected to axial loads:

Design criteria, design examples of walls under UDL, solid walls, cavity walls, solid wall supported at the ends by cross wall, walls with piers.

Design of walls subjected to concentrated axial loads:

Solid walls, cavity walls, solid wall supported at the ends by cross wall, walls with piers, design of wall with openings.

Design of walls subjected to eccentric loads:

Design criteria – stress distribution under eccentric loads –Problems onec centrically loaded solid walls, cavity walls, walls with piers.

Design of Laterally and transversely loaded walls:

Design criteria, design of solid wall under wind loading, design of shear wall – design of compound walls. Introduction to reinforced brick masonry, lintels and slabs. In-filled frames: Types – modes of failures – design criteria of masonry retaining walls.

Course outcomes:

After studying this course, students will be able to:

1. Select suitable material for masonry construction by understanding engineering properties.

2. Compute loads, load combinations and analyze the stresses in masonry.

3. Design masonry under compression (Axial load) for various requirements and conditions.

4. Design masonry under bending (Eccentric, lateral, transverse load) for various requirements and conditions.

5. Assess the behavior of shear wall and reinforced masonry.

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. Dayaratnam P, “Brick and Reinforced Brick Structures”, Scientific International Pvt. Ltd.

2. M. L. Gambhir, “Building and Construction Materials”, McGraw Hill education Pvt. Ltd.

Reference Books:

1. Henry, A.W., “Structural Masonry”, Macmillan Education Ltd.,1990.

2. IS 1905–1987 “Code of practice for structural use o f un-reinforced masonry- (3rd revision) BIS, New Delhi.

3. SP20(S&T)–1991,“Hand book on masonry design and construction(1strevision) BIS, New Delhi.