) Two bars of different size form a pin-connected frame that supports a Load 'P' at point A as shown in the Fig. 3. What safe load P (kN) can be applied if the allowable stress of 120 MPa is not to be exceeded? Assume buckling has been prevented. Allowable stress is based on a factor of safety of 2.0. Cross sectional area of the rods AB and AC are given in the adjacent table as per last digit of Roll number. What is the failure load? A Last digit of Area of AB Area of AC Roll No. 1, 2, 4 & 7 200 mm 230 mm 3, 6 & 8 160 mm² 190 mm“ 5, 9 & 0 180 mm 210 mm 2400 1600 Fig. 3 1200
) Two bars of different size form a pin-connected frame that supports a Load 'P' at point A as shown in the Fig. 3. What safe load P (kN) can be applied if the allowable stress of 120 MPa is not to be exceeded? Assume buckling has been prevented. Allowable stress is based on a factor of safety of 2.0. Cross sectional area of the rods AB and AC are given in the adjacent table as per last digit of Roll number. What is the failure load? A Last digit of Area of AB Area of AC Roll No. 1, 2, 4 & 7 200 mm 230 mm 3, 6 & 8 160 mm² 190 mm“ 5, 9 & 0 180 mm 210 mm 2400 1600 Fig. 3 1200
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:a) Two bars of different size form a pin-connected frame that supports a Load 'P' at point A as
shown in the Fig. 3. What safe load P (kN) can be applied if the allowable stress of 120
MPa is not to be exceeded? Assume buckling has been prevented. Allowable stress is based
on a factor of safety of 2.0. Cross sectional area of the rods AB and AC are given in the
adjacent table as per last digit of Roll number. What is the failure load?
Last digit of Area of AB | Area of AC
Roll No.
1, 2, 4 & 7
200 mm
230 mm“
3, 6 & 8
160 mm-
190 mm²
5, 9 & 0
180 mm
210 mm
2400
1600
Fig. 3
b) Two square bars are of equal length but have different size as shown in Fig. 4. Compare
the maximum stress in the two bars if they are to receive the same input of energy from
axial load. Given, m = (2 + last digit of your roll number).
2a
5.x
m.x
Fig. 4 last digit of roll=1
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