A steel bar AD has a cross-secțional area of 260 mm? and is loaded by forçes P, = 12 kN. P,= 8 kN. and P3 = 6, kN. The lengths of the segments of the bar are a = :5 m, b = 0.6 m, and c = 0.9 m. (a) Assuming that the modulus of elasticity E = 210 GPa, calculate the change in length & of the bar. Does the bar elongate or shorten? (b) By what amount P should the load P, be increased so that end D of the bar does not move when the loads are applied? %3D P1 P2 P3 в a b
A steel bar AD has a cross-secțional area of 260 mm? and is loaded by forçes P, = 12 kN. P,= 8 kN. and P3 = 6, kN. The lengths of the segments of the bar are a = :5 m, b = 0.6 m, and c = 0.9 m. (a) Assuming that the modulus of elasticity E = 210 GPa, calculate the change in length & of the bar. Does the bar elongate or shorten? (b) By what amount P should the load P, be increased so that end D of the bar does not move when the loads are applied? %3D P1 P2 P3 в a b
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A steel bar AD has a cross-secțional area of 260 mm? and is loaded by
forçes P, = 12 kN, P2-8 kN. and P3 = 6, kN. The lengths of the segments
of the bar are a = 1:5 m, b = 0.6 m, ạnd c = 0.9 m.
(a) Assuming that the modulus of elasticity E = 210 GPa, calcuļate the
change in length & of the bar. Does the bar elongate or shorten?
(b) By what amount P should the load P, be increased so that end D of
the bar does not move when the loads are applied?
%3D
P1
P2
P3
A
в
a
b
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