DOC007 - was; 30> Z/ZQ/fif Seat Number 1 NOTES:...

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Unformatted text preview: was; 30> Z/ZQ/fif Seat Number 1 NOTES: Please remove your hat. You must show ALL work in a neat, legible, and logical order for credit. Please note that the oldest trick in the book is to write so messily, and work in such an illogical order, that perhaps the prof won’t notice that you don’t know what you’re doing. If I cannot read and follow your work at a glance, you will receive no credit, even if the answer is correct. Please take this seriously. Problem 1) For the steel pipe shaft shown the torque at B is 20 kip feet, with 30 kip feet at C. The pipe has an outside diameter = 6 inches, A AB ‘ C E and an inside diameter = 5.5 inches. Use the ‘ following material properties: E = 30,000 ksi, G = 11,000 ksi, and CL = 6.5xE-6 in/in/deg F. The length of the pipe from A to B is 4 feet, from B to C is 6 feet, and from C to E is 5 feet. Determine the shearing stress on the inside surface of the pipe, and the total rotation (bend at the right end of the pipe. Problem 2) A hollow steel pipe is filled with concrete which is allowed to harden. The structure is then loaded axially as a column. The pipe has an outside diameter = 8 inches, with a 1/2 inch thick wall. I have measured the axial stress in the steel which = 30,000 psi. Assuming that the concrete now acts integrally with the steel, a) Determine the stress in the concrete, and b) The axial load P applied to the column. Use Econcrctc = 4,500 ksi, and Esteel ='29,000 ksi. Problem 3) For the steel bar shown below, determine the temperature at which the steel will yield. The bar was initially installed at a temperature of 70° F, at which time the bar exactly fit between the walls. The thermal coefficient of expansion of the bar is 6.5x10'6 in/in/°F. Use E for the 3 E bar = 30x106 psi, G = 10.5x106 psi, oyield = 36,000 psi, and Gunman, = 60,000 psi. Problem 4) A circular solid steel rod is embedded into the concrete wall shown. The ultimate shearing stress between the concrete and the rod “ can reach rummatc and the ultimate tensile stress for the steel rod can reach oultimate. Derive an equation to determine how far the steel rod must be imbedded into the wall (shown as x) so that the rod will not pull out of the wall, regardless of how much load P is placed on the rod? Name Seat Number 2 NOTES: Please remove your hat. You must show ALL work in a neat, legible, and logical order for credit. Please note that the oldest trick in the book is to write so messily, and work in such an illogical order, that perhaps the prof won’t notice that you don’t know what you’re doing. If I cannot read and follow your work at a glance, you will receive no credit, even if the answer is correct. Please take this seriously. Problem 1) For the steel pipe shaft shown the torque at B is 20 kip feet, with 30 kip feet at C. The pipe I B C E has an outside diameter = 6 inches, and an inside diameter = 5.5 inches. Use the following material j} properties: E = 30,000 ksi, G = 11,000 ksi, and OL = 6.5xE-6 in/in/deg F. The length of the pipe from A to q B is 5 feet, from B to C is 6 feet, and from C to E is 4 feet. Determine the shearing stress on the inside surface of the pipe, and the total rotation (bend at the right end of the pipe. Problem 2) A hollow steel pipe is filled with concrete which is allowed to harden. The structure is then loaded axially as a column. The pipe has an outside diameter = 6 inches, P with a 1/2 inch thick wall. I have measured the axial stress in the steel which = 30,000 psi. Assuming that the concrete now acts integrally with the steel, a) Determine the stress in the concrete, and b) The axial load P applied to the column. Econcretc = Estcel = Problem 3) For the steel bar shown below, determine the temperature at which installed at a temperature of 70° F, at which time the bar exactly fit between the walls. the steel will yield. The bar was initially a; The thermal coefficient of expansion of the bar is 6.5x10'6 in/in/°F. Use E for the bar = 30x106 psi, G = 10.5x106 psi, amid = 36,000 psi, and cultgmate = 60,000 psi. Problem 4) A circular solid steel rod is embedded into the concrete wall shown. The ultimate shearing stress between the concrete and the rod can reach tummate and the i“ X ultimate tensile stress for the steel rod can reach oummate. Derive an equation to determine how far the steel rod must be imbedded into the wall (shown as x) so that the rod will-not pull out of the wall, regardless of how much load P is placed on the rod? g9 .. M. w p.» ~ BC; (900%; : 30%,; Q STE—a. "“ (9 h m K‘fiil f _ 3 2: f/E W gaziawwgg QwiDQH‘Q/W #7:??? f, xxmv — :3 £54m a»: <1 W m ‘ 2 f ‘k ...
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This note was uploaded on 08/17/2010 for the course CVEN 305 taught by Professor Gardoni during the Spring '08 term at Texas A&M.

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DOC007 - was; 30&amp;gt; Z/ZQ/fif Seat Number 1 NOTES:...

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