A WT205 x 30 structural steel section (see Appendix B for cross-sectional properties) is used for a 9.7 m column. Assume pinned connections at each end of the column. Determine: (a) the slenderness ratio. (b) the Euler buckling load. Use E = 200 GPa for the steel. (c) the axial stress in the column when the Euler load is applied. Answer: (a) Slenderness ratio - i (b) Per kN (c) a - i MPa
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- A The member consists of the steel rod AB that is screwed into the end of the bronze rod BC. Find the largest value of P that meets the following design criteria: (i) the overall length of the member is not to change by more than 3 mm; and (ii) the stresses are not to exceed 140 MPa in steel and 120 MPa in bronze. The moduli of Problem 4: Steel A= 480 mm? 1.0 m B elasticity are 200 GPa for steel and 80 GPa for bronze. Problem 5: The compound bar carries the axial forces P and 2P. Find the maximum allowable value of P if the working stresses are 40 ksi for steel and 20 ksi for alumi- num, and the total elongation of the bar is not to exoceed 0.2 in. 3P Bronze A= 650 mm 2 m 3 ft 4 ft 2P Steel A = 0,4 in.2 E = 29 × 10° psi 2P Aluminum A = 0.6 in.2 E= 10 x 10° psiAsiacell|Asiacel K/s Asiacell For simply supported beam with rectangular cross section shown, determine the values and location of the maximum tensile and compressive bending * stresses 1000 lb 400 lb/ft 6 in DV 8 in 10 ft RA RpThe member shown in the right side consists of the steel rod AB that is screwed into the end of the bronze rod BC. Find the largest value of P that meets the following design criteria: (i) the overall length of the member is not to change by more than 4 mm; and (ii) the stresses are not to exceed 148 MPa in steel and 110 MPa in bronze. The moduli of elasticity are 200 GPa for steel and 80 GPa for bronze. T 1.0 m 2m 3P A Steel A=480 mm² B Bronze A=650 mm² C 2P
- Maxinnun allowable stress for steel - 140 MPa Maxinnum allowable stress for ahuminum = 90 MPa Maxinnun allowable stress for brouze - 100 MPa Required: Maximun safe value of axial load P Aluminum A 400 mm Bronze A= 200 mm Steel A= 500 mm 2P 4P 2.5 m 2.0 m 1.5mA flexural member is fabricated from two flange plates 1/2x16 and a web plate 1/4x20, thusforming a built-up ‘I’ shape member. The yield stress of the steel is 50 ksi.a. Compute the plastic section modulus Z and the plastic moment Mp with respect to the majoraxis.b. Compute the section modulus S and the plastic moment My with respect to the major axisStructural mechanics - The ultimate tensile strength of mild steel is 200 N/mm2. A tie of equal legs angle section has to carry an axial pull of 150 kN. Decide suitable dimensions of the section if the mean thickness is 10 mm. Take factor of safety as 2.