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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-VI EXAMINATION WINTER 2018
Subject Code:X60604 Date: 27/11/2018
Subject Name: Structural Design-I
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1.Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4.Use of IS 800:2007, IS 875 Part II, II, SP-16 and Steel Table is permitted
5. Consider fy 250 N/mm2 and fu 410 N/mm2 for steel if not given in data
Q.1

Draw neat sketches of beam to column stiffened and un-stiffened connection
07

Explain advantages and disadvantages of using steel structures and RCC Structures
07
Q.2

Differentiate between Limit State Method and Working Stress Method of Design.
07

Explain concept of Plastic design method. Give advantages of plastic design method
07
OR

A beam ISMB 500 transmit an end reaction of 250kN to the flange of column ISHB 250 @51.0 kg/m. Design a stiffened seat angle connection using 20 mm bolts of grade 4.6.
07
Q.3

Design a simply supported gantry girder to carry one electric overhead travelling crane with following details.
Span of gantry girder 6.5 m
Span of crane girder 16 m
Crane capacity 200 kN
Self weight of crane girder excluding trolley =200 kN
Self weight of trolley 40 kN
Minimum hook approach 1.2 m
Wheel base crane= 3.5 m
Self weight of rail section= 300 N/m
Yield stress of steel=250 MPa
Assume no lateral restrainst along the spam.
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OR
Q.3

Design a bolted plate girder for effective span of 21m to carry two concentrated factored loads 600 kN each at 7m from ends along with factored u.d.l of 50kN/m
The girder is laterally supported. (connection design is not required)
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2
Q.4

Design stiffened seat angle connection for a factored reaction of 250 kN from beam of ISMB 400 to the flange of column ISHB 200. Assume Fe 410 grade steel and shop welding.
14
OR
Q.4

A roof truss having slope 250 is covered with A.C. trafford sheets 127 N/m2 . Design an unequal single angle purlin if spacing of roof truss is 3.5 m and spacing of purlins is 1.6 m. Assume self weight of purlin 80 N/m and wind load 800 N/m2 .Assume purlins are continuous over the supports.
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Q.5

Design the foot bridge for the following data:
Type of truss: Type lattice girder
Span: 24 m
Width of walk way: 4
Flooring: RCC slab 110 mm with floor finish 1.0 kN/m2
Live Load: 5 kN/m2
Design Cross Girders and any one member of Top Chord.
Assume Suitable data if required .
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OR
Q.5

A portal frame consists of two hinge supported column of 4m height separated by a beam of span 8 m and loaded up to collapse with downward uniformly distributed load of 10 kN/m and lateral point load of 25 kN at beam column junction . Find the plastic moment of resistance if it is of uniform strength.
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