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(b) Two steel wires, AB and BC are used to support a lamp weighing 18 kN as shown in Figure 2. Each steel wire is hooked at A and C, respectively. Wire AB is at an angle (a) of 60° to the horizontal. Wire AB is 150 mm long and wire BC has a length of 300 mm. The diameter for wire AB is 50 mm and wire BC is a diameter of 30 mm.

(b) Two steel wires, AB and BC are used to support a lamp weighing 18 kN as shown in Figure 2. Each steel wire is hooked at A and C, respectively. Wire AB is at an angle (a) of 60° to the horizontal. Wire AB is 150 mm long and wire BC has a length of 300 mm. The diameter for wire AB is 50 mm and wire BC is a diameter of 30 mm.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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need help especially no.3.....thnks....

 

(b) Two steel wires, AB and BC are used to support a lamp weighing 18 kN as shown in Figure 2. Each steel wire is hooked at A and C, respectively. Wire AB is at an angle (a) of 60° to the horizontal. Wire AB is 150 mm long and wire BC has a length of 300 mm. The diameter for wire AB is 50 mm and wire BC is a diameter of 30 mm. i) Determine the internal force in wire AB and BC. ii) iii) Calculate the average normal stress in wire AB and BC. Determine the normal strain in wire AB if the lamp is applied to ring B, the ring moves to the new coordinate, B' (7 mm, -25 mm). Assume ring B has coordinates (0,0) at the initial. iv) Calculate the shear strain at corner A that has been subjected to the load. LAB = 150 mm 8 O B C LBC = 300 mm
Transcribed Image Text:(b) Two steel wires, AB and BC are used to support a lamp weighing 18 kN as shown in Figure 2. Each steel wire is hooked at A and C, respectively. Wire AB is at an angle (a) of 60° to the horizontal. Wire AB is 150 mm long and wire BC has a length of 300 mm. The diameter for wire AB is 50 mm and wire BC is a diameter of 30 mm. i) Determine the internal force in wire AB and BC. ii) iii) Calculate the average normal stress in wire AB and BC. Determine the normal strain in wire AB if the lamp is applied to ring B, the ring moves to the new coordinate, B' (7 mm, -25 mm). Assume ring B has coordinates (0,0) at the initial. iv) Calculate the shear strain at corner A that has been subjected to the load. LAB = 150 mm 8 O B C LBC = 300 mm
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