The torsional spring at B is undeformed when bars OB and BD are both in the vertical position and overlap. If a force F is required to position the bars at a steady orientation 0 = 54°, determine the torsional spring stiffness kt. The slot at C is smooth, and the weight of the bars is negligible. In this configuration, the pin at C is positioned at the midpoint of the slotted bar. 682 8 Answer: KT = i 62 kr B 0.1559 Fb D F E

The torsional spring at B is undeformed when bars OB and BD are both in the vertical position and overlap. If a force F is required to position the bars at a steady orientation 0 = 54°, determine the torsional spring stiffness kt. The slot at C is smooth, and the weight of the bars is negligible. In this configuration, the pin at C is positioned at the midpoint of the slotted bar. 682 8 Answer: KT = i 62 kr B 0.1559 Fb D F E

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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Concept explainers

Bars

In civil engineering, bars refer to steel reinforcement bars or rebars. These are structural members primarily used for reinforcement purposes in masonry works. A bar is characterized by its cross-sectional area, which is negligible compared to its length. Bars are usually manufactured by steel which is uniform throughout the length, or by meshing multiple steel wires. Other materials of the bar include carbon steel, glass fiber, carbon fiber, and basalt fiber. The reinforcing bars are coated with epoxy resins and other materials to enhance some of their properties including corrosion resistance.

Question

The torsional spring at B is undeformed when bars OB and BD are both in the vertical position and overlap. If a force F is required to
position the bars at a steady orientation 0 = 54°, determine the torsional spring stiffness kt. The slot at C is smooth, and the weight of
the bars is negligible. In this configuration, the pin at C is positioned at the midpoint of the slotted bar.
62
8
A
682
kT
B
Answer: KT= i 0.1559
Fb
E

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