The following questions are in reference to an approximate analysis of the porta
ID: 1732798 • Letter: T
Question
The following questions are in reference to an approximate analysis of the portal frame below. T777 If the base of each column were determined to be partially fixed, what is the most appropriate location for the assumed inflection point in each column (as measured from the base)? A. a. O, at the base b. H/3 C. H/2 d. 2H/3 B. If it were then determined that the flexural rigidity (El) of the girder was much smaller than that of the columns, where would the true inflection point likely be in relation to the above assumption? a. At the same location as the assumed inflection point. b. Farther up on the column. c. Farther down on the column. d. Very close to the base of the column.Explanation / Answer
?A. If the support condition would have been fixed then the point of inflection would have been close to H/2 but as the support are partially fixed so the point of inflection would lie at the support itself.
B. If the beam has low EI value as compared to that of column the point of inflection tends to shift upward from the base by small distance.
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