# Problem 2 a vertical post ab is embedded in a

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Problem-2A vertical post AB is embedded in a concrete foundation andheld at the top by two cables (see figure). The post is a hollowsteel tube with modulus of elasticity 200 GPa, outer diameter40 mm, and thickness 5 mm. The cables are tightened equallyby turnbuckles. If a factor of safety of 3.0 against Eulerbuckling in the plane of the figure is desired, what is themaximum allowable tensile force Tallow in the cables?
Problem-3The hoisting arrangement for lifting a large pipe is shownin the figure. The spreader is a steel tubular section withouter diameter 70 mm and inner diameter 57 mm. Itslength is 2.6 m and its modulus of elasticity is 200 GPa.Based upon a factor of safety of 2.25 with respect to Eulerbuckling of the spreader, what is the maximum weight ofpipe that can be lifted? (Assume pinned conditions at theends of the spreader.)
Problem-4The structural steel [E= 29,000 ksi] column shown in Figure is fixedat its base and free at its upper end. At the top of the column, a loadP= 35 kips is applied to the stiffened seat support at an eccentricityofe= 7 in. from the centroidal axis of the wide-flange shape.Determine:a)The maximum stress produced in the column.b)The lateral deflection of the column at its upper end.
Combined LoadingsProblem-1For the vertical flexural member shown, determine the principal stresses andthe maximum shear stress acting at pointsHandK, as shown. Show thesestresses on an appropriate sketch for each point.Answer:For point HFor point KProblem-2A shear wall in a reinforced concrete building is subjected to avertical uniform load of intensityqand a horizontal forceH, as shownin the first part of the figure. (The forceHrepresents the effects ofwind and earthquake loads.) As a consequence of these loads, thestresses at pointAon the surface of the wall have the values shown inthe second part of the figure (compressive stress equal to 1100 psi andshear stress equal to 480 psi).a)Determine the principal stresses and show them on a sketchof a properly oriented element.b)Determine the maximum shear stresses and associated normalstresses and show them on a sketch of a properly oriented element.Answer:
Problem-3A sign of dimensions 2.0 mx1.2 m is supported by a hollow circular polehaving outer diameter 220 mm and inner diameter 180 mm (shown inFigure). The sign is offset 0.5 m from the centerline of the pole and itslower edge is 6.0 m above the ground. Determine the principal stresses andmaximum shear stresses at pointsAandBat the base of the pole due to awind pressure of 2.0 kPa against the sign.Answer:At point AAt point B

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Term
Fall
Professor
Shao