5. The drill shaft of an oil well is made of A992 steel (E = 29000 ksi). The shaft extends 1200 ft into the ground and hangs freely from the derrick at A. Sketch the variation of the axial force in the pipe along the length in an axial load diagram. Calculate the maximum stress in each section of pipe and find the elongation of end D with respect to A. Note the weight per foot of the pipe is listed in the diagram.

5. The drill shaft of an oil well is made of A992 steel (E = 29000 ksi). The shaft extends 1200 ft into the ground and hangs freely from the derrick at A. Sketch the variation of the axial force in the pipe along the length in an axial load diagram. Calculate the maximum stress in each section of pipe and find the elongation of end D with respect to A. Note the weight per foot of the pipe is listed in the diagram.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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5. The drill shaft of an oil well is made of A992 steel (E = 29000 ksi). The shaft extends 1200 ft into the ground and hangs freely from the derrick at A. Sketch the variation of the axial force in the pipe along the length in an axial load diagram. Calculate the maximum stress in each section of pipe and find the elongation of end D with respect to A. Note the weight per foot of the pipe is listed in the diagram. AB=2.50 in.² WAB=3.2 lb/ft ABC= 1.75 in2 WBC= 2.8 lb/ft Acp= 1.25 in? WCD=2.0 lb/ft B 1 C 5000 ft D 5000 ft 2000 ft
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