A 30 ft long smooth, straight, round log has been floated downstream in a 6 ft deep flume by upstream loggers. The outside diameter of the log is 12 in, and the saturated specific gravity of the wood is 0.72 relative to 50°F water. The 60°F flume water flows with an average velocity of 10 ft/sec. At the downstream collection point, one end of the log is chained to an excavator crane arm directly over the flume and lifted until the log is approximately vertical. The lower 2 ft of the log remain submerged in the flume. The upper end of the log is free to rotate, but the upper end cannot translate. Neglect buoyancy effects. What is most nearly the angle from the vertical that the log will deflect in the moving water?

A 30 ft long smooth, straight, round log has been floated downstream in a 6 ft deep flume by upstream loggers. The outside diameter of the log is 12 in, and the saturated specific gravity of the wood is 0.72 relative to 50°F water. The 60°F flume water flows with an average velocity of 10 ft/sec. At the downstream collection point, one end of the log is chained to an excavator crane arm directly over the flume and lifted until the log is approximately vertical. The lower 2 ft of the log remain submerged in the flume. The upper end of the log is free to rotate, but the upper end cannot translate. Neglect buoyancy effects. What is most nearly the angle from the vertical that the log will deflect in the moving water?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Question 1: Estimate the approximate output of a bulldozer for the following conditions: - Swell, 25%. - Haul distance, 20m. - Moldboard size, 2.9m long, 0.9m high. - Rated moldboard capacity, 2.5m3 loose volume. - Operating factor, 50min/hr. - Pushing speed, 2.4 km/hr. - Returning speed, 4.8 km/hr. - Fixed time, loading and .shifting gears, 0.32 min
Determine the total flow rate through all channels per unit length of the respective Flownet of sheet pile. Given coefficient of permeability, k = 5 x10-5 cm/s (refer Figure below if Nf=3.5) h = 30 m h2= 10 m O 0.0021 cm2/s O 0.00125 cm2/s O 0.0438 cm2/s O 0.0056 cm2/s
Seepage theories
A 6-m self-propelled combine makes an average stop of 5 minutes everytime its 3-ton grain tank is to be unloaded. The yield of the 30-ha field is 60 tons. The operating speed is 6 kph. The time for turning on the headland at the ends of the 500-m field is 20 seconds. Find: a. theoretical field capacity b. actual field capacity c. Field efficiency
Correct answer with explaination
A horizontal impervious floor of length 20 m is provided with a sheet pile of 5 m depth at its downstream end. The head causing flow is 3 m. If the specific gravity of soil is 2.68 and void ratio of soil is 0.70 then the factor of safety against piping (by Khosla's theory) would be (Correct upto 1 decimal place).
(i) A weir across an alluvial river has a horizontal floor of length 80 m and retains 8 m of water under full pond condition. If the downstream sheet pile is driven to a depth 8 m below the average bed level, then calculate the exit gradient. Also assuming a porosity of 25% and the relative density of soil particles as 2.70, determine the critical exit gradient and the factor of safety of the system with respect to the exit gradient.
2. Use: Bligh Method and Lane Method The cross section of a concrete dam is as shown below investigate wheather the weir ia safe against piping hazards based on the Method from Bligh and the Lane Method with the classification: a. Fine Sand, b. Rough sand Ig it is not safe, what steps did you take to solve the problem.
assume all structures are composed of frame elements (beams and columns), i.e. internal shear, bending, and axial force may be present. Determine: ns , nsE, nsl, and whether the structure is stable or unstable. For ns, show your work for both the equation method and the "by inspection method" showing interim structures as releases are made. 5. TTTTT
Please what is the correct answer?