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Steel beams of wide-flange section W12 x 87 serve as a series of posts. Determine the maximum allowable distributed force per length that can be tolerated prior to buckling. Consider that buckling can occur in either transverse plane. Take the beams to be cantilevered at their base but pinned at the upper end (regardless of the plane of buckling). The spacing between posts is w = 20 ft, and the post length is L = 14 ft. (See Appendix E.)
Vehicles arrive at the booth at a rate of 4 vehicles per minute. The attendent opens the booth and improves the service rate over time following the function u(t)= 1.1 +0.3t, where u(t) is in vehicles per minute and t is in minutes.
Give three examples of rapidly varied flow. For each case, cite reasons why it does not satisfy one or more of the five basic assumptions of gradually varied flow theory.
What is the smallest particle size (density 2.65 g/cm3) that will be removed in a horizontal grit chamber 10 m long and 1.0 m deep if the flow rate is 1000 m3/hr. Assume the temperature of the water is 25°C.
knowing that both members are in compression and that the force is 15 KN in member A and 10 KN in member B, determine by trigonmetry the magnitude and direction of the resultant of the force applied to the bracket by member A and B.
Determine the discharge of a trapezoidal concrete channel section with a bottom width of 4 ft and side slopes of 2:1. The depth of flow is 5 ft and the channel slope is 0.5%
assume a future where security countermeasures against dos attacks are much more widely implemented than at present. in
In all but a very few vehicles today crush or crumple zones are employed as a method to reduce energy transfer to the occupants in a crash. For the most part crumple zones form a structural part of the car such as frontal rail or rear bumper beam..
A cantilevered W12x136 (ASTM-A36) steel member beam is 18 ft in length. If a concentrated load of 12 kips is applied at a point 6.25 ft from the beam's free end, use the superposition technique to find:
determine a composite scs runoff curve number for a 600acre basin that is totally within soil group C. the land use is 40% contoured row crops in poor hydrologic condition. 60% native pasture in fair hydrologic condition.
All the members of the braced frame shown in Figure S11.3are of uniform section. Set up the stiffness matrix for the frame and hence determine the value of W at which elastic instability occurs. The loading on the members may be replaced by equiva..
Compare the head loss for water flow (Q=5 cfs) in a 12 in., 3000 ft. long steel pipe using the darcy-weisbach equation and the hazen-williams formula.
Construct the hysteresis loops for a small amplitude at which only the softer elements yield plastically and for a larger amplitude at which both elements yield plastically.
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