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Posted By: Sri Member Level: Gold Posted Date: 14 Dec 2007
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2006 Jawaharlal Nehru Technological University B.Tech Civil Engineering III/Sem1 Regular (NOV)Set 3,STRUCTURAL ENGINEERING DESIGN AND DRAWING-I(RCC) Question paper
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Code No: RR310103 Set No. 3
III B.Tech I Semester Regular Examinations, November 2006
STRUCTURAL ENGINEERING DESIGN AND DRAWING-I(RCC)
(Civil Engineering)
Time: 3 hours Max Marks: 80
Answer any ONE Question from PART-A
and any THREE Questions from PART-B
Note:Assume suitable data whenever necessary
Use of IS codes & Structural Tables is permitted
? ? ? ? ?
PART-A(Marks:32)
1. Design a simply supported Rectangular Beam to carry 30kN/m superimposed load
over a span of 6m on 460mm wide supports. Use M20 grade concrete and Fe 415
grade steel. Check the design for all necessary conditions. Draw to a suitable scale.
(a) Longitudinal Section showing reinforcement details.
(b) The cross section of the Beam at salient points, showing reinforcement details.
2. Design a isolated footing for a rectangular column 300 x 450mm carrying an axial
load of 1000 kN. The net bearing capacity of the soil is 120kN/m2. Use M20 grade
concrete and Fe 415 grade steel.
Draw to scale the reinforcement details.
(a) Plan of the footing
(b) Sectional elevation of the footing.
PART-B (Marks:16x3=48)
3. (a) Is the limit state method in any way a better method of design of concrete
structures than the working stress design? Give reasons for your answer.
(b) Enumerate the five limit states commonly used in limit state design and state
briefly how they are provided for in design.
4. What is meant by limit state? Discuss the different limit states to be considered
in reinforced concrete design.
5. Determine the shear stress in a 250 X 500 mm rectangular section if the shear force
is 20 kN and torsional moment is 10 kN.m at service loads. Asume M 20 mix and
0.75% tension reinforcement at an effective coverof 50 mm.
6. (a) How does bracing effect the behavior of slender columns? Explain how bracing
can be provided for columns in Multistoried buildings.
(b) A column 350 x 350mm has an unsupported length of 8m and equivalent
length of 5m both the axes. It is loaded with characteristic loads P=500KN,
Mxx(top)=40KN-m Mxx (bottom)=-25KN-M. Assuming the column is bent
in double curvature design the longitudinal steel. Use M30 & Fe415.
7. Design a one way simply supported slab of span 4.5m to cary a live load of 4kN/m2
floor finish of 1kN/m2 and partitions 1kN/m2. Use M 20 grade concrete and Fe
415 grade TOR steel.
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