KAMARAJ COLLEGE OF ENGINEERING AND TECHNOLOGY, VIRUDHUNAGAR

(Affiliated to Anna University Chennai)

DEPARTMENT OF CIVIL ENGINEERING

B.E. Civil Engineering

IV Year (VII Semester) Academic Year : 2012 - 13

Regulation 2008 : Anna University of Technology, Tirunelveli

CE76 - COMPUTER AIDED DESIGN AND DRAFTING

LAB MANUAL

CONTENTSPage No.

Study Exercise – AutoCAD Commands 3

RCC

1. Design and drawing of RCC Cantilever retaining walls with

reinforcement details. 5

2. Design and drawing of RCC Counterfort type retaining walls with

reinforcement details. 6

3. Design of Solid slab bridges for IRC loading and reinforcement details 7

4. Design of RCC Tee beam bridges for IRC loading and reinforcement details 8

5. Design and drafting of Intz type water tank 10

6. Design and detailing of Circular water tanks 12

7. Design and detailing of Rectangular water tanks 14

STEEL

8. Design of Pressed steel tank – Detailed drawings 15

9. Design of Rectangular steel tank – Detailed drawings 16

10. Design of Hemispherical bottomed steel tank – Detailed drawings 17

11. Design of Plate Girder bridge and Detailed drawings including connections 18

12. Design of Truss Girder bridges and Detailed drawings including connections 20

13. Analysis and Design of RC Portal Frame by STAADPro 24

14. Analysis and Design of Truss (Steel) by STAADPro 26

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STUDY EXERCISE – AUTOCAD COMMANDS

ARC Creates an arcAREA Calculates the area and perimeter of objects or of defined areasARRAY Creates multiple copies of objects in a patternBHATCH Fills an enclosed area or selected objects with a hatch patternBLOCK Creates a block definition from objects you selectBOUNDARY Creates a region or a polyline from an enclosed areaBOX Creates a three-dimensional solid boxBREAK Erases parts of objects or splits an object in twoCAL Evaluates mathematical and geometric expressionsCHAMFER Bevels the edges of objectsCIRCLE Creates a circleCOPY Duplicates objectsDIST Measures the distance and angle between two pointsDIVIDE Places evenly spaced point objects or blocks along the length or perimeter of an

objectDONUT Draws filled circles and ringsELLIPSE Creates an ellipse or an elliptical arcERASE Removes objects from a drawingEXPLODE Breaks a compound object into its component objectsEXPORT Saves objects to other file formatsEXTEND Extends an object to meet another objectEXTRUDE Creates unique solid primitives by extruding existing two-dimensional

objectsFILLET Rounds and fillets the edges of objectsGRID Displays a dot grid in the current viewportGROUP Creates a named selection set of objectsHATCH Fills a specified boundary with a patternHELP (F1) Displays online helpID Displays the coordinate values of a locationIMPORT Imports files in various formats into AutoCADINSERT Places a named block or drawing into the current drawingLEADER Creates a line that connects annotation to a featureLENGTHEN Lengthens an objectLIMITS Sets and controls the drawing boundaries and grid displayLINE Creates straight line segmentsLINETYPE Creates, loads, and sets linetypesLIST Displays database information for selected objectsLTSCALE Sets the linetype scale factorMLINE Creates multiple parallel linesMOVE Displaces objects a specified distance in a specified directionMTEXT Creates multiline textNEW Creates a new drawing fileOFFSET Creates concentric circles, parallel lines, and parallel curvesOPEN Opens an existing drawing file

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OPTIONS Customizes the AutoCAD settingsORTHO Constrains cursor movementOSNAP Sets object snap modesPEDIT Edits polylines and three-dimensional polygon meshesPLAN Displays the plan view of a user coordinate systemPLINE Creates two-dimensional polylinesPLOT Plots a drawing to a plotting device or filePOINT Creates a point objectPOLYGON Creates an equilateral closed polylineQUIT Exits AutoCADRECTANG Draws a rectangular polylineREDRAW Refreshes the display in the current viewportREGEN Regenerates the drawing and refreshes the current viewportREGION Creates a region object from a selection set of existing objectsROTATE Moves objects about a base pointSAVE Saves the drawing under the current file name or a specified name SCALE Enlarges or reduces selected objects equally in the X, Y, and Z directionsSKETCH Creates a series of freehand line segmentsSNAP Restricts cursor movement to specified intervalsSPHERE Creates a three-dimensional solid sphereSPLINE Creates a quadratic or cubic spline (NURBS) curveSPLINEDIT Edits a spline objectSTRETCH Moves or stretches objectsSUBTRACT Creates a composite region or solid by subtractionTEXT Displays text on screen as it is enteredTIME Displays the date and time statistics of a drawing TORUS Creates a donut-shaped solidTRIM Trims objects at a cutting edge defined by other objectsU Reverses the most recent operationUNDO Reverses the effect of commandsUNION Creates a composite region or solid by additionUNITS Controls coordinate and angle display formats and determines precisionXLINE Creates an infinite lineXPLODE Breaks a compound object into its component objectsZOOM Increases or decreases the apparent size of objects in the current viewport Most commonly used commands:

S.No. Command Used for1 UNITS setting the drawing area2 LINE drawing boundary lines of structural components3 PLINE drawing longitudinal reinforcement, hooks at ends4 DONUT drawing cross section of reinforcement 5 DIMENSION vertical and horizontal dimensioning6 TEXT writing text7 ARC leader line for naming components8 HATCH filling with solid or various other patterns9 OFFSET copy parallel lines10 ARRAY drawing series of reinforcement cross sections along any line

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Ex.No.1: DESIGN AND DRAWING OF RCC CANTILEVER RETAINING WALL

1. Design a cantilever retaining wall to retain an earth embankment with a horizontal top 4m above ground level. Density of earth = 18 kN/m3. Angle of internal friction = 30o. SBC of soil = 200 kN/m2.

Coefficient of friction between soil and concrete = 0.5. Adopt M 20 grade concrete and Fe 415 HYSD bars.

Draw the following views: Cross-section of retaining wall showing reinforcement details. Longitudinal section showing curtailment.

(Model Diagram)

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Ex.No.2 : DESIGN AND DRAWING OF RCC COUNTERFORT TYPE

RETAINING WALLS WITH REINFORCEMENT DETAILS

2. Design a counterfort retaining wall based on the following data:Height of wall above ground level = 6 m; SBC of soil = 160 kN/m2; Angle of internal friction = 33o; Density of soil = 16 kN/m3; Spacing of counterforts = 3m c/c.Adopt M20 grade concrete and Fe 415 HYSD barsDraw the following views showing reinforcement details:

Sectional elevation midway between counterforts Sectional elevation through counterforts Sectional plan at base of counterforts

(Model Diagram)

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Ex.No.3 : DESIGN OF SOLID SLAB BRIDGES FOR IRC LOADING AND

REINFORCEMENT DETAILS

3. Design an RC slab culvert for a national highway to suit the following data:A two-lane carriage way (7.5 m wide); Footpaths on either side (1 m wide); Clear span = 6 m; Wearing coat = 80 mm; Width of bearing = 0.4 m;Materials : M 25 grade concrete ; Fe 415 grade HYSD bars;Loading : IRC class AA tracked vehicle

Design the RC deck slab and sketch the details of reinforcements in the longitudinal and

cross-sections of the slab.

(Model Diagram)

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Ex.No.4 : DESIGN OF RCC TEE BEAM BRIDGES FOR IRC LOADING AND REINFORCEMENT DETAILS

Design of RC T-beam bridge deck Design an RC T-beam girder bridge to suit the following data:Clear width of roadway = 7.5 m; Span (c/c of bearing) = 16 m; Live load = IRC class AA tracked vehicle; Average thickness of wearing cost = 80 mm; Materials M25 grade concrete Fe 415 grade HYSD bars Using Courbon’s method, compute the design moments and shears, design the deck slab, main girder and cross girders and sketch the typical

details of reinforcements. (Model Diagram)

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Ex.No.5 : DESIGN AND DRAFTING OF INTZ TYPE WATER TANK

Design an Intze-type water tank of capacity 1 million litres, supported on an elevated tower comprising 8 columns. The base of the tank is 16 m above ground level and the depth of foundations is 1 m below ground level. Adopt M20 grade concrete and Fe 415 grade HYSD bars. The design of the tank should confirm to the stresses specified in IS: 456-1978, clauses 44.1 and 44.2. Draw the sectional elevation of the water tank showing reinforcement details in the dowm, tank walls, ring girder, columns, braces and foundations.(Model Diagram)

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Ex.No. 6 : DESIGN AND DETAILING OF CIRCULAR WATER TANKS

Design an RC circular water tank resting on the ground with a flexible base and a spherical dome for a capacity of 5,00,000 litres. The depth of storage is to be 4m. Free board = 200 mm. Use M 20 grade concrete and Fe 250 grade I steel. Permissible stresses should comply with the values recommended in IS: 456-1978, clause 44.1 and IS:3370 (Part – II)-1965 .

Draw the following views : Cross-section of the tank showing reinforcement details in dome, tank walls and floor

slab. Plan of the tank showing reinforcement details.

(Model Diagram)

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Ex.No. 7 : DESIGN AND DETAILING OF RECTANGULAR WATER TANKS

Design a rectangular RC water tank (resting on the ground) with an open top for a capacity of 80,000 litres. The inside dimension of the tank may be taken as 6 m x 4m. Design the side walls of the tank using M20 grade concrete and Fe 250 grade I mild steel. Draw the following views:

Cross-sectional elevation of the tank showing reinforcement details in tank walls. Plan of the tank showing reinforcement details. (Model Diagram)

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Ex.No. 8 : DESIGN OF PRESSED STEEL TANK – DETAILED DRAWINGS

Design an elevated rectangular pressed steel tank having a capacity of 1,20,000 litres. The tank is open on the top. The height of staging is 12m upto the top of the columns.(Model Diagram)

DIAGONAL STAY AT MIDDLE JTS ONLY

DIAGONAL STAY AT EACH JOINT

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Ex.No. 9 : DESIGN OF RECTANGULAR STEEL TANK – DETAILED DRAWINGS

Design an overhead rectangular tank of 80000 litres capacity. The height of columns of staging is 12m. Take wind pressure intensity of 1.5 kN/m2. (Model Diagram)

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Ex.No. 10 DESIGN OF HEMISPHERICAL BOTTOMED STEEL TANK – DETAILED DRAWINGS

Design an elevated cylindrical steel tank with hemispherical bottom for 1,60,000 litres capacity. The tank has conical roof. The ring beam of the tank is at a height of 10m from the ground level. The tank is to be built at Delhi. Take fy = 250 N/mm2. (Model Diagram)

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Ex.No. 11 : DESIGN OF PLATE GIRDER BRIDGE AND DETAILED DRAWINGS INCLUDING CONNECTIONS

Design a composite bridge deck with an RC slab and steel plate girders, to cover a span of 18 m. Clear width of roadway = 7.5 m; Foot path = 1 m on either side; spacing of mail girders = 2m; Live load = IRC class AA tracked vehicle;

Materials M25 grade concrete Fe 415 grade HYSD bars. Design the RC deck slab and the steel plate girders with shear connectors. Draw the following views to a suitable scale.

The cross-section of the deck slab continuous over steel girders, and cross-section of the steel girders. Longitudinal elevation of the steel girders showing the details of the shear connectors.

(Model Diagram)

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Ex.No. 12 DESIGN COMPLETELY A THROUGH TYPE TRUSS GIRDER BRIDGE TO CARRY A SINGLE TRACK B.G. (REVISED) LOADING FOR THE FOLLOWING DATA:

Effective span = 39 m; Centre to centre spacing of stringer = 1.9m; Sleepers and their spacings = 250 mm x 150 mm x 2.8 m @ 0.4 m c/c; Density of timber = 7.4 kN/m3; Weight of stock rails = 0.44 kN/m; Weight of guard rails = 0.26 kN/m; Weight of fasteners, etc. = 0.28 kN/m of track.

(Model Diagram)

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Ex. No. 13 : ANALYSIS AND DESIGN OF RC PORTAL FRAME BY STAADPROAnalyze the RC portal frame and generate the BMD, SFD and AFD for the given data:

i) Length of columns = 5m, Size of columns : 230 x 230mmii) Length of beam = 5m, Size of beam : 230 x 450mmiii) Loading on beam: Factored uniformly distributed load of 25kN/m on beam and a factored

concentrated load of 20kN, acting on the left beam-column joint.

Also design the beam and columns for M20 concrete and Fe415 steel.Rendered View Loading Diagram

-25.000 kN/m

20.000 kN

Load 1X

YZBMD SFD

40.649 kNm

4.711 kNm

-31.227 kNm

1.979 kNm

-91.186 kNm

40.649 kNm

10.103 kNm

6.041 kNm

1.979 kNm

Bending ZLoad 1 : Moment - kNm

XYZ

17.969 kN

17.969 kN

17.969 kN

68.555 kN

-6.445 kN

-81.445 kN

2.031 kN

2.031 kN

2.031 kN

Shear YLoad 1 : Force - kNm

XYZAFD Material Take Off

81.445 kN

81.445 kN

17.969 kN 17.969 kN

68.555 kN

68.555 kN

Axial ForceLoad 1 : Force - kNm

XYZ

TOTAL VOLUME OF CONCRETE = 0.83 CU.METER BAR DIA WEIGHT (in mm) (in New) -------- -------- 8 138.66 12 452.82 ------------ *** TOTAL = 591.48

Design Outputs

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EDITOR FILE

STAAD SPACESTART JOB INFORMATIONENGINEER DATE 21-Jun-10END JOB INFORMATIONINPUT WIDTH 79UNIT METER KNJOINT COORDINATES1 0 0 0; 2 0 4 0; 3 6 4 0; 4 6 0 0;MEMBER INCIDENCES1 1 2; 2 2 3; 3 3 4;DEFINE MATERIAL STARTISOTROPIC CONCRETEE 2.17185e+007POISSON 0.17DENSITY 23.5616ALPHA 1e-005DAMP 0.05END DEFINE MATERIALMEMBER PROPERTY2 PRIS YD 0.45 ZD 0.231 3 PRIS YD 0.23 ZD 0.23CONSTANTSMATERIAL CONCRETE MEMB 1 TO 3SUPPORTS1 4 FIXEDLOAD 1 LOADTYPE None TITLE 1.5(Load)MEMBER LOAD2 UNI GY -25JOINT LOAD2 FX 20PERFORM ANALYSIS PRINT ALLSTART CONCRETE DESIGNCODE INDIANFC 20000 ALLFYMAIN 415000 ALLFYSEC 415000 ALLMAXMAIN 25 ALLMAXSEC 10 ALLMINMAIN 12 ALLMINSEC 8 ALLDESIGN COLUMN 1 3DESIGN BEAM 2CONCRETE TAKEEND CONCRETE DESIGNFINISH

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Ex. No. 14 : ANALYSIS AND DESIGN OF TRUSS (STEEL) BY STAADPRO

Analyze the plane truss and generate the axial force diagram for the given data:

Also design the members of the truss.Rendered View Axial Force Diagram

Design Outputs

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EDITOR FILESTAAD TRUSSSTART JOB INFORMATIONENGINEER DATE 15-Jun-09END JOB INFORMATIONINPUT WIDTH 79UNIT METER KNJOINT COORDINATES1 0 0 0; 2 3 0 0; 3 6 0 0; 4 1.5 3 0; 5 4.5 3 0;MEMBER INCIDENCES1 1 2; 2 2 3; 3 1 4; 4 4 5; 5 5 3; 6 4 2; 7 2 5;DEFINE MATERIAL STARTISOTROPIC STEELE 2.05e+008POISSON 0.3DENSITY 76.8195ALPHA 1.2e-005DAMP 0.03END DEFINE MATERIALMEMBER PROPERTY INDIAN1 2 7 TABLE ST ISA75X75X83 TO 6 TABLE ST ISA100X100X10CONSTANTSMATERIAL STEEL ALLSUPPORTS1 PINNED3 FIXED BUT FX FZ MX MY MZLOAD 1 LOADTYPE Dead TITLE LOAD CASE 1JOINT LOAD4 5 FY -204 FX 15PERFORM ANALYSIS PRINT ALLPARAMETER 1CODE INDIANCHECK CODE ALLPARAMETER 2CODE INDIANSTEEL MEMBER TAKE OFF ALLFINISH

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