EARTHQUAKE RESISTANT DESIGN An Over View of the Subject

Subject Code: 07A70104(Elective-I) Year : IV B.Tech Semester : I Semester Number of Units: 8 Number of Hours /Week: 5

Why to study ERD In the past 3 centuries over 3 million people have died due to earthquakes and earthquake related disasters. The economic losses estimated for the period 1929-1950 are in excess of US$10 billion. 2/3 of the earths crust is seismically active, which means hat about 1,000,000,000 people are living in areas of the world that are prone to earthquakes. The Object of Reinforced Concrete design is to achieve a structure that will result in a safe and economical solution.

Prerequisites to study ERD The concepts and principles studied in Engineering Mechanics Structural Analysis Design of Reinforced Concrete structures Structural Dynamics

Usefulness of ERD for a Civil Engineering Student Basic principles of designing R.C.C. shall be helpful for students in designing, supervising and executing construction activities effectively Hence, it becomes essential for every civil Engineer to know the procedure and concepts for designing all components of Reinforced cement concrete.

Objectives The student shall be able to Understand basic principles of R.C.C.design. Use IS code 456:2000, IS:875 (II) etc. Design of diff. R.C.C. components e.g. slab/beam/column/footing etc. Draw reinforcement details for above component members. Read and interpret structural drawings.

For a given structural system, the design problem consists of Idealization of structure for Analysis Estimation of loads Analysis of idealized structural model to determine axial thrust, shears, bending moments, and deflections. Design of Structural elements, and Detailed structural drawings and schedule of reinforcing bars.

Contents of Unit-I Description of topic No. of Hrs. Introduction to Materials 1 Constituents of Concrete Grades of Concrete Recommendation of IS:456-2000 Elastic Theory Design Constants Singly Reinforced Rectangular Beam Beam 2 Tutorial on singly reinforced beams

Contents of Unit-II Description of topic No. of Hrs. Introduction to limit state design 1 Basic statistical principles Characteristic strength, characteristic load, partial safety factors Stress – strain curves for steel , concrete Assumptions in limit state design, Derivation of stress block parameters for Rectangular section 2

Contents of Unit-III Description of topic No. of Hrs. Limit state of collapse:flexure:Singly reinforced rectangular beams, Design equations. 2 Problems on finding MR and design of singly reinforced beams using limit state method Tutorial on singly reinforced beams 1 Doubly reinforced beams : Introduction , Design equations. Problems on doubly reinforced beams Tutorial on doubly reinforced beams Flanged ( T , L ) beams : Introduction , Design equations. Problems on flanged ( T, L ) beams Tutorial on flanged ( T , L ) beams

Contents of Unit-IV Description of topic No. of Hrs. Shear : Introduction, Modes of shear failure 1 Problems on shear reinforcement design for beams 2 Tutorial on shear Bond : Introduction, anchorage &development length Problems on bond Torsion : Introduction , Types of torsion Problems on torsion Beams subjected to torsion,BM and SF

Description of topic No. of Hrs. Contents of Unit-V Description of topic No. of Hrs. Columns : Introduction, classification 1 Design of columns subjected to only axial loads 2 Design of columns subjected to uni-axial bending Design of columns subjected to bi-axial bending Braced and un-braced columns IS Code provisions,Tutorial on column design

Contents of Unit-VI Description of topic No. of Hrs. Footings : introduction , types , codal provisions 1 Design of isolated square footings 2 Design of isolated rectangular footings Design of isolated circular footings Tutorial on footings

Contents of Unit-VII Description of topic No. of Hrs. Slabs : Introduction , Types , Codal provisions 1 Design of one-way simply supported slabs Design of one-way continuous slabs 2 Tutorial on one-way slabs Design of two-way simply supported slabs Design of two-way restrained slabs Tutorial on two-way slabs

Contents of Unit-VII Description of topic No. of Hrs. Limit state of deflection : Introduction 1 Problems on limit state of deflection 2 Limit state of cracking : Introduction Problems on limit state of cracking Tutorial on limit state of serviceability

I.S.Codes Required (i) I.S. 456-2000 : Code of practice for plain and reinforced concrete . (ii) I.S. 875-1987 : Designs loads other than (part I toV) earthquake for building Design. Part-I : Dead loads . Part-II : Imposed loads . ( i) SP-16 : Design Aids to I.S. : 456-1978 (ii) SP- 34 : Detailing in R.C.C. structures .