08-05-2012, 02:12 PM
Design and Detailing
5th Sem-Civil.doc (Size: 231 KB / Downloads: 72)
RATIONALE :
Safety and durability of a structure depend on appropriate design, proper detailing and construction as per detailed drawing and specification. For this reason, ‘Design and Detailing’ is and important subject for Civil Engineering Diploma Holders. They are most often asked to act as a supervisor in construction projects, in addition to this they may also require to work as a draftsman responsible for preparing detailed drawing for construction sites. Diploma holders re also called upon to assist designers, suggest modifications for repair and renovation work and also to design simple structural elements. The subject attempts to cover the above aspects to civil engineering profession.
OBJECTIVES:
On completion of the subject a student will be able to –
i) Design of simple R.C. structural elements
ii) Draw structural details for construction
COURSE CONTENTS:
1.0 Introduction to design and detailing
1.1 State and explain the objectives of design and detailing
1.2 Explain the advantages of Reinforced Concrete
1.3 State the different methods of design
2.0 Working Stress Method of Design (as per I.S 456,latest version with amendments)
2.1 Explain briefly the general concept, assumption of old Working Stress Method (WSM) of design, moment of resistance of a rectangular section through WSM, concept of under-reinforced, balanced and over reinforced sections
2.2 Basic concept of design of single reinforced members, double reinforced beam sections by working stress method. Design concept only of T-beam (single reinforced)
3.0 Limit State Method (LSM) of Design (as per I.S 456, latest version with amendments)
3.1 Define Limit States
3.2 State and explain limit states of collapse, serviceability and durability
3.3 State and explain the factors responsible for (i)durability of structure, (ii) serviceability of a structure and how they are taken into account in design
3.4 Define and explain characteristic strength of materials - steel and concrete
3.5 Define and explain briefly different characteristic loads for structures (IS 875 Parts I to V)
3.6 Explain the partial safety factors for loads and material strengths under different load combinations of different limit of states
3.7 Draw and explain the assumed actual and design stress-strain diagrams of Mild Steel, HYSD & TMT bars and concrete.
3.8 Assumptions in LSM of design.
4.0 Limit States Of Collapse of Singly Reinforced Members in Bending
4.1 Explain Ultimate Strength of R.C beams (Limit States Of Collapse in flexure), balanced under reinforced and over reinforced sections, compression stress block in concrete.
4.2 Evaluate the depth of neutral axis of a given beam, solve problems
4.3 Calculate moment of resistance using equations in Appendix of IS-456, solve problems.
4.4 Evaluate the minimum depth for a given design bending moment for singly reinforced Sections, solve problems.
4.5 Explain basic considerations, behavior of doubly reinforced beams.
4.6 Explain the differences in the behaviors of ‘T’ and ‘L’ beams with rectangular beams.
5.0 Limit States Of Collapse in Shear (Design of Shear by LSM)
5.1 Explain shear cracks and shear failure with or without shear reinforcement
5.2 Explain contribution of concrete in resisting design shear, types of shear reinforcement, design of stirrups, minimum shear reinforcement, step-by-step procedure for design of links, shear in slabs, detailing of steel.
6.0 Bond, Anchorage, Development lengths & Splicing (LSM)
6.1 Explain and differentiate between bond & anchorage
6.2 Explain and calculate development length for HYSD bars for M20 & M25 grade concrete
6.3 Explain and anchorage of bars (refer to SP 24 and IS 456: clause 25.2.3.1)
Check the development length at support of a beam
6.5 Explain the conditions for termination of tension reinforcement in flexural members
6.6 Explain the equivalent development lengths of bonds, IS code provision for anchorage, splicing of bars, laps and importance of laps and anchorage length