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SREE SOWDAMBIKA COLLEGE OF ENGINEERING

CHETTIKURICHI, ARUPPUKOTTAI – 626 134.

COURSE FILE

DEPARTMENT OF

CIVIL ENGINEERING

Subject Code : CE 35

Subject Name : MECHANICS OF FLUIDS

Year / Sem : II / III

Regulation : 2008

Total no. of hours :60

Prepared by Recommended by Approved by

……………………. …………………….. …………………. STAFF INCHARGE HOD PRINCIPAL

CE 2306

DESIGN OF RC ELEMENTS

III / V

2008

60

CE2306 DESIGN OF RC ELEMENTS L T P C 3 1 0 4OBJECTIVEThis course covers the different types of philosophies related to Design of Reinforced ConcreteStructures with emphasis on Limit State Method. The design of Basic elements such as slab, beam, column and footing which form part of any structural system with reference to Indianstandard code of practice for Reinforced Concrete Structures and Design Aids are included. Atthe end of course the student shall be in a position to design the basic elements of reinforcedconcrete structures.UNIT I METHODS OF DESIGN OF CONCRETE STRUCTURES 12Concept of Elastic method, ultimate load method and limit state method – Advantages of LimitState Method over other methods – Design codes and specification – Limit State philosophy asdetailed in IS code – Design of flexural members and slabs by working stress method –Principles of Design of Liquid retaining structures – Properties of un-cracked section –Calculation of thickness and reinforcement for Liquid retaining structureUNIT II LIMIT STATE DESIGN FOR FLEXURE 12Analysis and design of one way and two way rectangular slab subjected to uniformly distributedload for various boundary conditions and corner effects – Analysis and design of singly and doubly reinforced rectangular and flanged beamsUNIT III LIMIT STATE DESIGN FOR BOND, ANCHORAGE SHEAR & TORSION 12Behaviour of RC members in bond and Anchorage - Design requirements as per current code -Behaviour of RC beams in shear and torsion - Design of RC members for combined bending shear and torsion.UNIT IV LIMIT STATE DESIGN OF COLUMNS 12Types of columns – Braced and unbraced columns – Design of short column for axial, uniaxialand biaxial bending – Design of long columns.UNIT V LIMIT STATE DESIGN OF FOOTING AND DETAILING 12Design of wall footing – Design of axially and eccentrically loaded rectangular footing – Designof combined rectangular footing for two columns only – Standard method of detailing RC beams, slabs and columns – Special requirements of detailing with reference to erection process.TOTAL: 60 PERIODSTEXT BOOKS1. Varghese, P.C., “Limit State Design of Reinforced Concrete”, Prentice Hall of India, Pvt. Ltd., New Delhi2. Krishna Raju, N., “Design of Reinforced Concrete Structures”, CBS Publishers & Distributors, New DelhiREFERENCES1. Jain, A.K., “Limit State Design of RC Structures”, Nemchand Publications, Rourkee2. Sinha, S.N., “Reinforced Concrete Design”, Tata McGraw-Hill Publishing Company Ltd., New Delhi3. Unnikrishna Pillai, S., Devadas Menon, “Reinforced Concrete Design”, Tata McGraw-Hill Publishing Company Ltd., New Delhi

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SREE SOWDAMBIKA COLLEGE OF ENGINEERINGChettikurichi, Aruppukottai

COURSE PLAN

Name of the staff : S. SARASWATHI PRIYASubject with code : CE 2306, DESIGN OF RC ELEMENTSCourse : B.E Semester / Branch : V / CIVIL

I. Objectives:This course covers the different types of philosophies related to Design of

Reinforced Concrete Structures with emphasis on Limit State Method. The design of Basic elements such as slab, beam, column and footing which form part of any structural system with reference to Indian standard code of practice for Reinforced Concrete Structures and Design Aids are included. II. Learning Outcome and End use.

Having successfully taken this course, you will be able to

1. Know the basic concepts of structural members in the field of Civil engineering.

2. Ability to design the basic elements of reinforced concrete structures

III. List of Text and Reference Books:TEXT BOOKS

1. Varghese, P.C., “Limit State Design of Reinforced Concrete”, Prentice Hall of India, Pvt. Ltd., New Delhi 2002.

2. Krishna Raju, N., “Design of Reinforced Concrete Structures”, CBS Publishers & Distributors, New Delhi, 2003

REFERENCES1. Jain, A.K., “Limit State Design of RC Structures”, Nemchand Publications,

Rourkee2. Sinha, S.N., “Reinforced Concrete Design”, Tata McGraw-Hill Publishing

Company Ltd., New Delhi.3. Unnikrishna Pillai, S., Devdas Menon, “Reinforced Concrete Design”, Tata

McGraw- Hill Publishing Company Ltd., New Delhi.

IV.Web Resources :

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UNIT TOPIC WEBLINK

I Concept of Elastic method, ultimate load method and limit state method

http://www.sefindia.org/forum/viewtopic.php?t=5887

Advantages of LimitState Method over other methods

http://www.deepexcavation.com/uploads/.../poster_deepexcavationllc.pdf

Design of flexural members and slabs by working stress method

http://www.assakkaf.com/Courses/ENCE355/Lectures/Part1/Chapter2a.pdf

Principles of Design of Liquid retaining structures – Properties of un-cracked section

http://mkchariths.webs.com/BS8007.pdf

II Analysis and design of one way and two way rectangular slab subjected to uniformly distributed load for various boundary conditions and corner effects

http://www.cipremier.com/e107_files/downloads/Papers/100/31/100031050.pdf

Analysis and design of singly and doubly reinforced rectangular and flanged beams

http://ecourses.vtu.ac.in/nptel/Civil_Eng/Civilpdfs/Design%20of%20Concrete%20Strctures.pdf

III Behaviour of RC members in bond and Anchorage

http://digitalunion.osu.edu/r2/summer05/fisher.533/research_docs/Greece_fib_2003.pdf

Behaviour of RC beams in shear and torsion

http://ethesis.nitrkl.ac.in/2344/

Design of RC members for combined bending shear and torsion

http://trid.trb.org/view.aspx?id=10555

IV Types of columns – Braced and unbraced columns

http://www.colincaprani.com/files/notes/CED1/RC%20Columns

Design of short column for axial, uniaxial and biaxial

http://by.genie.uottawa.ca/~murat/Chapter%203%20SP17%20-%2009-07.pdf

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bending

Design of long columns

http://www.civil.ualberta.ca/structures/reports/ser116leungandsimmonds.pdf

V Design of wall footing www.ce-ref.com/ wall _ftg.htm

Design of axially and eccentrically loaded rectangular footing

www.osp.mans.edu.eg/s foundation / foundtion.htm

Standard method of detailing RC beams, slabs and columns

www.freedownload.is/doc/ rc - beam - detailin

Special requirements of detailing with reference to erection process

www.engineeringcivil.com/pre-engineered-buildings.html

Extra Web Resources: www.civil-engineering.suite101.com/.../civil_engineering .

www.en.wikipedia.org/wiki/civil _engineering/

http://www.ahm531.com/E-book/Uploaded/%286%29Structural%20Details

%20In%20Concrete.pdf

http://web.itu.edu.tr/celep/files/y5

http://ebooks.narotama.ac.id/files/Structural%20Detailing%20in

%20Concrete%20%282nd%20Edition%29/Chapter

%202%20%20Reinforced%20Concrete%20Beams%20And%20Slabs.pdf

V. Lesson PlanReference Book

Teachin No. of Cumulativ

5

Topic No

Topic Name gAids

Periods

e No. of PeriodsPage No

Chapter No

UNIT IMETHODS OF DESIGN OF CONCRETE STRUCTURES

1.

Concept of Elastic method, ultimate load method and limit state method

1.2 – 1.3

R1

BB 2 2

2. Design of flexural members

1.4-1.13 BB 2 4

3. Design of slabs by working stress method

1.14- 1.18 BB 3 7

UNIT IILIMIT STATE DESIGN FOR FLEXURE

1Analysis and design of one way slab subjected to uniformly distributed load

2.1 – 2.8

R1

BB 2 9

2

Analysis and design of two way rectangular slab subjected to uniformly distributed load for various boundary conditions and corner effects

2.9- 2.19 BB 3 12

3

Analysis and design of singly reinforced rectangular beams

2.35- 2.37 BB 3 15

4

Analysis and design of doubly reinforced rectangular beams

2.35- 2.37 BB 3 18

5

Analysis and design of flanged beams

2.43- 2.54 BB 3 21

UNIT IIILIMIT STATE DESIGN FOR BOND, ANCHORAGE,SHEAR & TORSION

1Behaviour of RC members in anchorage

3.3-3.14R1

BB 4 25

2Behaviour of RC members in bond

3.17-3.23 BB 3 28

3 Behaviour of RC beams in 3.25- 3.29 BB 6 34

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shear & torsionUNIT IV

LIMIT STATE DESIGN OF COLUMNS

1Braced and un-braced columns 4.1- 4.14

R1

BB 6 40

2 Design of short column 4.34- 4.41 BB 4 44

3Design of long columns

4.34- 4.41 BB 3 47

UNIT V TURBINES

1

Design of wall footing, eccentrically loaded &combined rectangular footing

5.10- 5.9

R1

BB 7 54

2

method of detailing RC beams’RC slabs & RC columns

5.10- 5.18 BB 6 60

VI. Other related Books / Journals available at our library:

BOOKS:

1. Sinha, S.N., “Reinforced Concrete Design”, Tata McGraw-Hill Publishing Company Ltd., New Delhi

2. Unnikrishna Pillai, S., Devdas Menon, “Reinforced Concrete Design”, Tata McGraw- Hill Publishing Company Ltd., New Delhi

3. Jain, A.K., “Limit State Design of RC Structures”, Nemchand Publications, Rourkee

JOURNALS:

1. Reinforced Concrete Design, IEEE.

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VII. Additional Topics Beyond The Syllabus:

1. Blast Resistant Design of Reinforced Concrete Structures.

2. Design of Reinforced Concrete Elements under Fire.

VIII. Cycle Test Portions:

Cycle Test I - 2 units

Cycle Test II - 2 units

Cycle Test III - 1 unit

Prepared By Approved by

STAFF INCHARGE HOD / CIVIL (S SARASWATHI PRIYA)

( AP/CIVIL)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAICLASS TEST – I

SUBJECT: DESIGN OF RC ELEMENTS YEAR/SEM : III / VSUBJECT CODE: CE 2306 SECTION : CIVIL

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DATE: MAX.MARKS:20 1 What are the advantages of limit state method over working stress and ultimate load

methods? (2)2 How do you find the moment of resistance of a beam section? (2)3. A singly reinforced concrete beam is of width 450mm and effective depth 715mm. It is reinforced with 8Nos.20mm mild steel bars. Assuming M20 concrete, determine its moment of resistance according to the working stress method. Determine also the stress in steel when the beam is subjected to the above moment (16)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAICLASS TEST – II

SUBJECT: DESIGN OF RC ELEMENTS YEAR/SEM : III / VSUBJECT CODE: CE 2306 SECTION : CIVILDATE: MAX.MARKS:20 1. Draw stress-strain curve for various grades of steel. (2)2. State the assumptions made in working stress method Distinguish between one –way and two way slabs (2)3. Design a rectangular beam section subjected to an ultimate moment of 120kNm. Use concrete M20 and steel Fe415. Adopt limit state method (16)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAICLASS TEST – III

SUBJECT: DESIGN OF RC ELEMENTS YEAR/SEM : III / VSUBJECT CODE: CE 2306 SECTION : CIVILDATE: MAX.MARKS:20 1. Distinguish between one –way and two way slabs (2)2. Why is it necessary to provide transverse reinforcement in a one way slab (2)3. A rectangular beam has b=200mm, d=400mm if steel used is Fe 415 and grade of concrete is M25. Find the steel required to carry a factored moment of 12kNm (16)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAICLASS TEST – IV

SUBJECT: DESIGN OF RC ELEMENTS YEAR/SEM : III / VSUBJECT CODE: CE 2306 SECTION : CIVILDATE: MAX.MARKS:20 1. Explain maximum depth of neutral axis (2)2. Find the depth of neutral axis in terms of ‘d’ for a balanced section using Fe 415 steel, in limit state method Define Flow net (2)3. A doubly reinforced concrete beam is 250mm wide and 510mm depth the center of tensile steel reinforcement. The compression reinforcement consists of 4 Nos. of 18mm dia bars placed at an effective cover of 40mm from the compression edge of the beam. The tensile reinforcement consists of 4Nos. of 20mm diameter bar. If the beam section is subjected to a BM of 85kNm, calculate the stresses in concrete and tension steel. (16)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAICLASS TEST – V

SUBJECT: DESIGN OF RC ELEMENTS YEAR/SEM : III / VSUBJECT CODE: CE 2306 SECTION : CIVILDATE: MAX.MARKS:20

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1. Under what circumstances are doubly reinforced beams used? (2)2 What is modular ratio? (2)

3. A rectangular beam width b=350mm and d=550mm has a factored shear of 400kN at the critical section near the support. The steel at the tension side of the section consists of four 32mm bars which are continued to support. Assuming fck=25 and fy=415(N/mm2) design vertical stirrups for the section (16)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAICLASS TEST – VI

SUBJECT: DESIGN OF RC ELEMENTS YEAR/SEM : III / VSUBJECT CODE: CE 2306 SECTION : CIVILDATE: MAX.MARKS:20

1. When shear reinforcement is necessary in a beam (2)

2. What is bond stress? Write an expression for it (2)

3. A rectangular beam width b = 250mm and effective depth 500mm reinforced with 4 bars of 20mm diameter. Determine the shear reinforcement required to resist a shear force of 150kN. Use concrete M20 and steel Fe415 (16)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAICLASS TEST –VII

SUBJECT: DESIGN OF RC ELEMENTS YEAR/SEM : III / VSUBJECT CODE: CE 2306 SECTION : CIVILDATE: MAX.MARKS:20

1. What is the minimum and maximum percentage of steel allowed in R.C.Column? Explain why it is necessary to specify the minimum and maximum percentage (8)2. Explain (a) Equilibrium torsion (b) Compatibility torsion (8)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAICLASS TEST – VIII

SUBJECT: DESIGN OF RC ELEMENTS YEAR/SEM : III / VSUBJECT CODE: CE 2306 SECTION : CIVILDATE: MAX.MARKS:20

1. How do you classify a column as short or long? (6)2. An R.C. Column 500x400mm is subjected to an axial ultimate load of 2500kN and bent in single curvature about the minor axis with My(top)=90knm and My(bottom)=120knm as ultimate moments. If L0=7.2m and Le=5.75m on both axes, calculate the design moments for the column (14)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAICLASS TEST – IX

SUBJECT: DESIGN OF RC ELEMENTS YEAR/SEM : III / VSUBJECT CODE: CE 2306 SECTION : CIVILDATE: MAX.MARKS:20

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1. Sketch the placement of steel in rectangular footing with a non-central load (8)2. Under what circumstances a trapezoidal footing become necessary (8)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAICLASS TEST – X

SUBJECT: DESIGN OF RC ELEMENTS YEAR/SEM : III / VSUBJECT CODE: CE 2306 SECTION : CIVILDATE: MAX.MARKS:20

1. Draw a neat sketch of a masonry footing (4)2. Design a interior wall of a single storied workshop of height 5.4m surrounding a RCC roof. The bottom of the wall rests over a foundation block. Assume roof load equal to 45kN/m. A pier provided at a spacing of 3.6m along length of wall (16)

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAIChettikurichi, Aruppukottai

FIRST CYCLE TEST

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SUBJECT CODE: CE 2306 Year & Branch : III CIVILSUBJECT: DESIGN OF RC ELEMENTS Total marks : 50Staff In-charge: S SARASWATHI PRIYA Time : 1 ½ hrs

PART - A( 5 X 2 = 10)

Answer all questions:

1. Draw stress-strain curve for various grades of steel2. What do you understand by limit state of collapse 3. What is modular ratio? Determine the modular ratio at M25 grade concrete 4. What are the advantages of limit state method over working stress and ultimate load

methods?5. How do you find the moment of resistance of a beam section6. Discuss the different limit state to be considered in reinforced concrete design7. Why is it necessary to provide transverse reinforcement in a one way slab?8. Distinguish between one –way and two way slabs.9. Explain the terms ‘balanced’, ‘over reinforced’ and ‘under reinforced’ sections in

bending

PART – B

Answer all questions:

10. a) Determine the reinforcement for a T beam with flange width = 1500mm, web width = 300mm, thickness of slab = 100mm, effective depth 735mm, to carry a moment of 380kNm due to characteristic loads. Use M25 concrete and Fe 415 steel. Using Working Stress Design.

(OR)b) Design a rectangular slab supported on its all four edges (600mm thick) over a classroom of size 4.8m x6.2m. Two adjacent edges of the slab are discontinuous and the remaining two edges are continuous. A finishing surface of cement concrete of 20mm shall be provided over the slab. The slab shall be used as classroom. M20 grade of concrete and HYSD bars shall be used. The unit weight of finishing surface concrete is 24KN/m3

8. (a) Design a smallest concrete section of a RC beam to resist an ultimate moment of 62kNm, assuming width 230mm, concrete grade M20 and HYSD bars of grade Fe415

(OR)(bDesign the interior span of a continuous one way slab for an office floor continuous

over tee beams spaced at 3 meters. Live load = 4kN/m, Floor finish = 1kN/m2.Use concrete M20 and steel Fe415. Adopt limit state method. Sketch the steel reinforcement

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAIChettikurichi, Aruppukottai

SECOND CYCLE TEST

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SUBJECT CODE: CE 2306 Year & Branch : III CIVILSUBJECT: DESIGN OF RC ELEMENTS Total marks : 50Staff In-charge: S SARASWATHI PRIYA Time : 1 ½ hrs

PART – A( 5 X 2 = 10)

Answer all questions:

1. Reinforced concrete slab are generally safe in shear and do not require shear reinforcement? Why?

2. What is modular ratio?3. Mention the difference in design principles for L Beam and T Beam.4. When shear reinforcement is necessary in a beam5. What is bond stress? Write an expression for it.6. What will be minimum and maximum area of tension reinforcement in a beam?7. How shear reinforcement improves the strength of beam?8. How do you classify a column as short or long?9. Write the procedure for the design of an axially loaded short column.

PART – B

Answer all questions:

(2 X 16 = 16 marks)

10. a) A simply supported beam is 5m in span and carries a characteristic load at 75kN/m. If 6Nos. of 20mm bras are continued into the supports. Check the development length at the supports assuming grade M20 concrete and Fe415steel.

(OR)b) A reinforced concrete beam 500mm deep and 230mm wide is reinforced with 8Nos.20mm diameter bars at mid span to carry a UDL of 22.5kn/m (inclusive of its own weight) over simple span of 8m. Assuming concrete grade M20, steel grade Fe415, load factor 1.5 and width of support 230mm (i) determine the minimum development length required for 20mm diameter bar to develop full strength (ii) apply check for flexural development length at support assuming all bar to continue at support (iii) determine the minimum number of bars required at support for development length of flexure.

11. (a) An R.C.Column 500x400mm is subjected to an axial ultimate load of 2500kN and bent in single curvature about the minor axis with My(top)=90knm and My(bottom)=120knm as ultimate moments. If L0=7.2m and Le=5.75m on both axes, calculate the design moments for the column

(OR)(b) Design a circular column with helical reinforcement of 400mm diameter and 4m in

length to carry factored load of 1000kN.The column is hinged at both ends. Use concrete M25 and steel Fe415

SREE SOWDAMBIKA COLLEGE OF ENGINEERING, ARUPPUKOTTAIChettikurichi, Aruppukottai

THIRD CYCLE TEST

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SUBJECT CODE: CE 2306 Year & Branch : III CIVILSUBJECT: DESIGN OF RC ELEMENTS Total marks : 50Staff In-charge: S SARASWATHI PRIYA Time : 1 ½ hrs

PART - A( 5 X 2 = 10)

Answer all questions:

1. Sketch the placement of steel in rectangular footing with a non-central load.2. What are the situations in which combined footings are preferred over isolated footings?3. Draw a neat sketch of a masonry footing.4. What is slenderness ratio for a masonry wall? State the maximum values?5. Compare the behavior of tied and spirally reinforced column.6. How do you classify one-way footing and two-way footing in foundation?7. Under what circumstances a trapezoidal footing become necessary?8. What are the guidelines to be followed while lapping the bars9. Draw the detailing of reinforcement in two way slab and one way continuous slab

PART – B

Answer all questions: (2X 16 = 16 marks)

1. a) A solid footing has to transfer a dead load of 1000kn and an imposed load of 400kn from a square column 400mmx400mm. Assuming fck=20N/mm2 and fy=415N/mm2 and safe bearing capacity to be 200KN/m2, Design the footing

(OR)1. b) Design a interior wall of a single storied workshop of height 5.4m surrounding a RCC

roof. The bottom of the wall rests over a foundation block. Assume roof load equal to 45kN/m. A pier provided at a spacing of 3.6m along length of wall.

8. (a) Design a combined rectangular footing for two columns spaced at 500cm centers. The first column 300mmx300mm carried load of 1000kn.and second column 300mmx300mm carries a load of 1500kn at service state. Weight of Soil = 20kN/m2, angle of repose=300 and safe bearing capacity of soil = 150kN/m2. Use concrete M25 and steel Fe415.

(OR)(b) A solid footing has to transfer a dead load of 1000kN and an imposed load of 400kN from a square column 400x400mm (with 16mm bars.) Assuming fy=415 and fck=20N/mm2 and safe bearing capacity to be 200kN/m2. Design the footing

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