6.6 Basic force sensor. The ceiling of a large building is supported by 16 vertical steel tubes, each with an inner diameter of 100 mm and an outer diameter of 140 mm. Each tube is equipped with a 240 2 strain gauge (nominal, unstressed resistance at 20°C), prestressed to 2.5% strain. The Young's modulus for steel is 200 GPa. The strain gauge has a gauge factor of 2.2. a. If the maximum strain measured is 2% in each tube, what is the maximum weight of the roof? b. What is the change in the resistance of the strain gauge and what is the actual resistance reading for maximum allowable weight?
6.6 Basic force sensor. The ceiling of a large building is supported by 16 vertical steel tubes, each with an inner diameter of 100 mm and an outer diameter of 140 mm. Each tube is equipped with a 240 2 strain gauge (nominal, unstressed resistance at 20°C), prestressed to 2.5% strain. The Young's modulus for steel is 200 GPa. The strain gauge has a gauge factor of 2.2. a. If the maximum strain measured is 2% in each tube, what is the maximum weight of the roof? b. What is the change in the resistance of the strain gauge and what is the actual resistance reading for maximum allowable weight?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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