;

FIFTH SEMESTER DIPLOMA EXAMINATION IN ENGINEERING/

TECHNOLOGY - OCTOBER, 2016

STRUCTURAL DESIGN(Common for CE, EN' WR, QS and AR)

TED (10)-4005

EEVISION-2010)

1.

2.

J.

A+.

5.

l.

2.

J.

4.

(Maximum marks : 100)

Use of IS 456-2000, IS 800-2007' SP-l6 and steel tables

are permittedl

Reg. No.

Signature

lTime :3 hours

Marks

lNote:-

PAKT - A

(Maximum marks : l0)

Answerc//questionsinone.ortwosentences.Eachquestioncanies2marks.

List tyPes of steel used in R'C'C'

Define characteristic stength of concrete'

How column is classified into short column ard long column ?

What are th6 mechanical properties of strucnral steel ?

List the types of loads acting on a truss'

PART _- B

(Madmum marks : 30)

ilAnsweranyJiveofthefollowingquestions.Eachquestioncarries6marks.

(ir) Limit state of serviceability

(5x2=tr0)

Explain: (i) Limit state of collapse

Discuss the grading of aggregate'

What are the assumptions in limit state design ?

Find the ultimate a,rial load that a circulr column of 500mm diameter having

aneffectivelengthof5meterscancarry.Thecolumnisreinforcedwith8 numbers of vertical bars of 20mm diameter. The column canies lateral ties'

Use M20 grade concrete and Fe 415 grade steel'

l77l

www.madinpoly.com

Marks

write down the advantages and disadvantages of bolted connection'

Define:(i)Slendemessratio(ii)Effectivelengthofcompressionnrember

Write short note on

(i) Latenally supported beam (ii) Latenally unsupported beam (5x6=30)

PART - C

(Maximum marks : 60)

(fnswer one fvllquestion from each unit. Each frrll question carries 15 marks')

UNII -

I

n (a) A reinforced concrete beam is 300 x 500mm. It is subjected to a factored

moment of l20kNm. Using M20 grade concrete and Fe 415 grade steel.

Design the reinforcement. Assume the effective Cover to reinforcement as

40mm.

(b) A cantilever beam projects 1.5m from the face of the wall. The beam canies

a udl of 20klttr/m on the entire length inclusive of self weight. Design the beam

for limit state of collapse in flexure using M20 grade concrete and Fe 415

grade steel.

On

(a) A doubly reinforced R.C.C. beam of size 230mm x 450mm over all depth canies

an udl of 20kN/m in addition to its self weight. The effective span of the beam

is 5;5m. Design the reinforcement for the beam using M20 grade concrete

and Fe 250 grade steel. Assume effective cover to reinforcement as 40mm.

(b) Design a lintel over a door opening 2.4m wide. The height of brick wallabove the opening is 3m. Masonry weight 19kN/m3, the brick walls are

300mm thick. Use M20 grade concrete and Fe 415 grade steel.

UNrr - II

(a) Explain the following foundations :

(r) Mat or raft foundation (O Combined footing(ii) Strap footing (tD Spread footing

(b) Design a short RCC square colurnn to carry an axial load of 900kN,use M25 grade concrete and Fe 415 grade steel.

On

VI (a) Design catilever slab with an overhang of lm from a wall of 300 mm thick.The live.load on the slab is 2.1 kN/mt using M20 grade concrete and Fe 415grade steel. Use M20 grade concrete Fe 415 grade steel.

(b) A staircase has,the following dimensions, waist W=75mm, nosing N=25mrn,rise R:l75mm, Going G:225mm, the live load expected 2kN/m2. Calculatethe factored load and effective depth for design if the staircase is spanningtransversely.

5.

6.

7.

ry

8

www.madinpoly.com

MarksUNrr ._ IiI

vII (a) Write down the advantages and disadvantages of steel structures over RCCstructures.

8(b) Design a single angle tension member to carry a tensile force of 225kN due

to dead load and live load. The angle is connected to gusset plate by filletweld, tr:250MPa, fu=410MPa 7

On

VIII (a) Design a double angle tension member to carry an axial load 480N, usingsteel of yield stress 250N/mm2 and ultimate stress is 410N/mm2. the effectivelength of member is 6m. The angles are to be corurected on either side ofl2mm thick plate by fillet welds. 8

(b) Design single angle strut connected to gusset plate to carry l80kN factoredload. The length of the strut between centre to cente connections is 3m. 7

Ururr - IV

D( (a) Draw the cross section of a plate girder, mark the elements and discuss thefunction of each elements. 8

(b) Symmetric trusses of span 20m and height 5m are spaced at 4.5m centre tocentre. Design Channel section purlins to be placed at l.4rn distance to resistthe following loads.

Weight of sheeting including bolts : 17lN/m2

Live load : 0.4kN/m2

Wind load : l.2kN/m2. suction jOn

X (a) (i) List the different types of roof truss.

(ii) Sketch the roof truss and mark the component Parts.

(b) Design a simply supported beam of effective span 1.5m carrying a factoredconcentrated load of 360kN at mid span.

www.madinpoly.com