CE 6711 - Computer Aided Design and Drawing

NSCET – LAB MANUAL

NADAR SARASWATHI COLLEGE OF ENGINEERING AND TECHNOLOGY

THENI

CE 6711 - COMPUTER AIDED DESIGN & DRAFTING LABORATORY MANUAL

PREPARED BY

STAFF INCHARGE

RECOMMENDED BY

HOD/CIVIL

DEPARTMENT OF CIVIL ENGINEERING

APPROVED BY

PRINCIPAL


GENERAL INSTRUCTIONS: The following instructions should be strictly followed by the students in the Computer Aided Design & Drafting Laboratory. 1.

All the students are expected to come to the lab with shoe,

uniform, ID card etc. whenever they

come for the laboratory class. 2.

For each lab class, all the students are expected to come with

Manual, Record note book, pencil,

eraser, sharpener, scale, divider, drawing sheet, & calculator, etc. 3.

All the students are expected to complete their laboratory work

and get it corrected in the

laboratory class itself. 4.

Computer System must be handled with care and the students must switch on and off in the presence of Lab Technician only.

5. The students must save their files in the location specified by the 6.

While coming to the next lab class, students are expected to correction.

Lab in Charge.

submit

the

record

note

for

7. Breakage amount will be collected from the student(s) for causing damage to the systems due to wrong operation or carelessness

STAFF INCHARGE


HOD/CIVIL


CE 6711 COMPUTER AIDED DESIGN & DRAFTING LABORATORY LTPC0042 OBJECTIVE

At the end of the course the student acquires hands on experience in design and preparation of structural drawings for concrete / steel structures normally encountered in Civil Engineering practice. 1. Design and drawing of RCC cantilever and counterfort type retaining walls with reinforcement details 2. Design of solid slab and RCC Tee beam bridges for IRC loading and reinforcement details 3.Design and drafting of circular and rectangular RCC water tanks 4. Design of plate Girder Bridge - Truss Girder bridges– Detailed Drawings including Connections 5. Design of hemispherical bottomed steel tank

TOTAL: 60 PERIODS TEXT BOOKS

1. Krishna Raju, “Structural Design & Drawing (Concrete & Steel)”, CBS Publishers 2004. 2. Punmia, B.C., Ashok Kumar Jain, Arun Kumar Jain, “Design of steel structures”, Lakshmi publications Pvt. Ltd 2003. REFERENCES

1. Krishnamurthy, D., “Structural Design & Drawing – Vol. II”, CBS Publishers & Distributors, Delhi 1992. 2. Krishnamurthy, D., “Structural Design & Drawing – Vol. III Steel Structures”, CBS Publishers & Distributors, New Delhi 1992. EXAMINATION DURATION 3 HOURS

LIST OF EQUIPMENTS

1. 1. Models of Structures - 1 each. 2. Computers Pentium IV - 30 Nos. 3. Analysis and Design Software - Minimum 5 user License - 1 No. 4. Auto CAD Software - Multi user License - 1 No.





CONTENTS CYCLE-I

Study Exercise – AutoCAD Commands 1. Design and drawing of RCC Cantilever retaining walls with reinforcement details. 2. Design and drawing of RCC Counterfort type retaining walls with reinforcement details. 3. Design of Solid slab bridge culvert for IRC loading and reinforcement details 4. Design of RCC Tee beam girder bridges for IRC loading and reinforcement details

CYCLE-II

5. Design and detailing of Circular water tanks 6. Design and detailing of Rectangular water tanks 7. Design of Plate Girder bridge and Detailed drawings including connections 8. Design of Truss Girder bridge and Detailed drawings including connections 9.. Design of hemispherical bottomed steel tank



EX NO-1 STUDY EXERCISE – AUTOCAD COMMANDS

DATE: ARC AREA ARRAY BHATCH BLOCK

Creates an arc Calculates the area and perimeter of objects or of defined areas Creates multiple copies of objects in a pattern Fills an enclosed area or selected objects with a hatch pattern Creates a block definition from objects you select

BOUNDARY BOX BREAK CAL CHAMFER CIRCLE COPY DIST DIVIDE DONUT ELLIPSE ERASE EXPLODE EXPORT EXTEND

Creates a region or a polyline from an enclosed area Creates a three-dimensional solid box Erases parts of objects or splits an object in two Evaluates mathematical and geometric expressions Bevels the edges of objects Creates a circle Duplicates objects Measures the distance and angle between two points Places evenly spaced point objects or blocks along the length or Draws filled circles and rings Creates an ellipse or an elliptical arc Removes objects from a drawing Breaks a compound object into its component objects Saves objects to other file formats Extends an object to meet another object Creates unique solid primitives by extruding existing two-

EXTRUDE FILLET GRID GROUP HATCH HELP (F1) ID IMPORT INSERT LEADER LENGTHEN LIMITS LINE LINETYPE LIST LTSCALE MLINE MOVE MTEXT NEW OFFSET OPEN OPTIONS ORTHO

dimensional Rounds and fillets the edges of objects Displays a dot grid in the current viewport Creates a named selection set of objects Fills a specified boundary with a pattern Displays online help Displays the coordinate values of a location Imports files in various formats into AutoCAD Places a named block or drawing into the current drawing Creates a line that connects annotation to a feature Lengthens an object Sets and controls the drawing boundaries and grid display Creates straight line segments Creates, loads, and sets linetypes Displays database information for selected objects Sets the linetype scale factor Creates multiple parallel lines Displaces objects a specified distance in a specified direction Creates multiline text Creates a new drawing file Creates concentric circles, parallel lines, and parallel curves Opens an existing drawing file Customizes the AutoCAD settings Constrains cursor movement


perimeter of an object

objects


CE2405-COMPUTER AIDED DESIGN &DRAWING LABORATORY OSNAP PEDIT PLAN PLINE PLOT POINT POLYGON QUIT

Sets object snap modes Edits polylines and three-dimensional polygon meshes Displays the plan view of a user coordinate system Creates two-dimensional polylines Plots a drawing to a plotting device or file Creates a point object Creates an equilateral closed polyline Exits AutoCAD

RECTANG REDRAW REGEN REGION ROTATE SAVE SCALE SKETCH SNAP SPHERE SPLINE SPLINEDIT STRETCH SUBTRACT

Draws a rectangular polyline Refreshes the display in the current viewport Regenerates the drawing and refreshes the current viewport Creates a region object from a selection set of existing objects Moves objects about a base point Saves the drawing under the current file name or a specified name Enlarges or reduces selected objects equally in the X, Y, and Z directions Creates a series of freehand line segments Restricts cursor movement to specified intervals Creates a three-dimensional solid sphere Creates a quadratic or cubic spline (NURBS) curve Edits a spline object Moves or stretches objects Creates a composite region or solid by subtraction

TEXT Displays text on screen as it is entered TIME Displays the date and time statistics of a drawing TORUS Creates a donut-shaped solid TRIM Trims objects at a cutting edge defined by other objects U Reverses the most recent operation UNDO Reverses the effect of commands UNION Creates a composite region or solid by addition UNITS Controls coordinate and angle display formats and determines precision XLINE Creates an infinite line XPLODE Breaks a compound object into its component objects ZOOM Increases or decreasesthe apparent size of objects inthe current viewport



CYCLE -I



EX NO-1 DESIGN OF CANTILEVER RETAINING WALL

DATE:


NSCET – LAB MANUAL CE2405-COMPUTER AIDED DESIGN &DRAWING LABORATORY



2

=53.84kN/m

σmin









CE2405-COMPUTER AIDED DESIGN &DRAWING LABORATORY

Result: Thus the exercise has been designed and drawn by using AutoCAD software package.



Practical Applications: Cantilever

retaining walls are used to hold the earth/soil in place behind the inside face.



EX NO-2 DESIGN OF COUNTERFORT RETAINING WALL

DATE:













Result: Thus the exercise has been designed and drawn by using AutoCAD software package.



Practical Applications:

If the height of the retaining wall exceeds certain limit, the cantilever walls are not economical. Economy can be achieved by providing counterforts which are nothing but vertical beams connected to the stem and the heel slab by reinforcements at regular intervals. The heel slab and the vertical stem are designed as continuous slabs instead of cantilever slabs. If the counterforts are provided in the toe side, the retaining wall is called a buttress wall .When the height of the stem goes beyond 6m; the thickness of the stem becomes uneconomical in cantilever retaining wall. In this case counterfort retaining walls are used. The counterforts support both the vertical stem as well as heel slab. Counterfort retaining walls are used to hold the earth/soil in place behind the inside face.



EX NO-3 DESIGN OF SOLID SLAB BRIDGE CULVERT

DATE:













Practical Applications:

The RC slab-type deck is generally used for small spans. This type of superstructure is economical for spans up to about 8m. Slab decks are simpler to construct due to the easier fabrication of formwork and reinforcements and placement of concrete. Generally, slab decks are supported at the ends on piers or abutments. The deck slab is designed as a one-way slab to support the dead load and live load with impact. Result:

Thus the exercise has been designed and drawn by using AutoCAD software package.



EX NO-4 DESIGN OF TEE BEAM BRIDGE DECK SLAB

DATE:































CYCLE –II



EX NO-5 DESIGN OF INTZ TYPE WATER TANK

DATE:













CE2405 –COMPUTER AIDED DESIGN AND DRAWING LABORATORY







RESULT

Thus the exercise has been design & drawn by AUTOCADD Software package. Practical Applications:

Flat bottomed tank requires more reinforcement in the bottom slab and domed bottom tank requires more reinforcement in the ring beam. In very large size diameter tanks, the size of the bottom slab can be reduced by providing conical bottom as shown in the figure, which is known as Intze tank. The main advantage of Intze tank is that the outward thrust from the conical part is resisted by the ring beam B 3 while the difference between the inward thrust from the bottom of conical dome and the outward thrust from the bottom dome are resisted by ring beam B2. The proportions of the conical dome and the bottom dome are so arranged that the outward thrust from bottom dome balances the inward thrust due to the conical dome.






EX NO-6 DESIGN OF CIRCULAR WATER TANK

DATE:









Result Thus the exercise has been design & drawn by AUTOCADD software pacage Practical Applications– Advantages & Disadvantages of circular tanks

Mainly used to store water in both public and private buildings. Has got more usage in all kinds of industries.

Advantages: 1. Less costly the below ground tanks and Easy to clean. 2. Can be raised off ground to increase water pressure. 3. Can detect cracks and leakages easily. 4. Can extract water via gravity and/or pumps.

Disadvantages: 5. Affected by weather. 6. Take up space.





EX NO-7 DESIGN OF RECTANGULAR WATER TANK

DATE:







Result Thus the exercise has been design and drawn by AUTOCADD software package



Practical Applications: Water tanks are widely used for storing water, gas and other liquids in railway yards petrol pumping stations



EX NO:8 DATE:

DESIGN OF RIVETED PLATE GIRDER























CE 6711 - Computer Aided Design and Drawing

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