Concept explainers
The value of the allowable axial load pressure for the different lengths.
Answer to Problem 11.9.7P
The value of the allowable axial load pressure for the different lengths is:
S.No | Length of column( ft) | Axial load ,Pallow( k ) |
1 | 06 | 58.8 |
2 | 12 | 43.0 |
3 | 18 | 23.1 |
4 | 24 | 13.0 |
Explanation of Solution
Given Information:
The outside diameter of the steel pipe column, do =4.5 in.
The thickness of the steel pipe column, t = .237 in.
The value of the young modulus, E = 29000 ksi
The value of maximum stress, sy = 36 ksi
Concept Used:
For pinned end, K=1
Here, r = radius of gyration.
Then we try different value of
Then select the trial column
Calculation:
For pinned end, K = 1.
Here, r = radius of gyration.
For L1 = 6 ft.
For L2 =12 ft
For L3 =18 ft.
For L4 = 24 ft,
Conclusion:
The value of the allowable axial load pressure for the different lengths is:
S.No | Length of column( ft) | Axial load ,Pallow( k ) |
1 | 06 | 328 |
2 | 12 | 243 |
3 | 18 | 134 |
4 | 24 | 75.3 |
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