INSTRUCTIONS TO CANDIDATES:
● Attempt all questions.
● Make necessary assumptions and state your assumption.
● Total marks for this exam is 70
● This exam constitutes 35% of the total marks for this unit
● Open book exam
PERMITTED MATERIALS
● Calculator
● Open book exam
EXAM BOOKLETS/MULTIPLE CHOICE ANSWER SHEETS
● 1 x 16 page exam booklet
EXAMINATION PAPERS ARE NOT TO LEAVE THE EXAMINATION ROOM
Q1
Explain what the symbols for stiffness ratios γ1 and γ2 for. Briefly outline how the values for those stiffness ratios can be calculated.
(5 marks)
Q2
Calculate the moment amplification factor for a braced member fixed at one end and pinned at other end. Length of the member is 6.0 m. E = 200 X 103 N/mm2. I = 18 x 106 mm 4. Axial force in the member = 116 kN. Moment at the ends are 18 kNm and 34 kNm. If necessary make appropriate assumptions and state the assumptions made.
(10 marks)
Q3
When it is necessary to use the moment modification factor αm. State the formula you will use to calculate the factor. With the aid of a diagram, explain the components of the formula.
(5 marks)
Q4.
A 250UB37.3kg/m Beam of 6m span is to carry a uniformly distributed dead load and live load. Ratio of live load to dead load is 1.5. The beam is 300 grade and simply supported. Calculate the maximum dead load and live load the beam can carry.
(8 marks)
Q5
Determine whether the Flange and Web elements of the welded plate girder of Grade 300 shown in fig below is Compact, Non compact or Slender.
Assume following Slenderness limits.
Plate Plastic limit – 8
For Flange, Yield limit – 15
For Web, Yield limit – 115
(10 marks)
Q6
A 530ub92.4 Grade 300 beam is supporting a column of width 150 mm (stiff bearing length) at the midpoint. Given V* = 300 kN. Check for the Web bearing capacity of the section. Make necessary assumptions and state the assumptions.
(10 marks)
Q7
For the Section given below, determine the web shear capacity at a point where the design moment is (a) Zero (b) Design moment is 180 kNm.
(10 marks