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Q4: Experiments were conducted to determine the safe buckling load on columns with T-section 100 mm...

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Civil Engineering

Q4: Experiments were conducted to determine the safe bucklingload on columns with T-section 100 mm × 100 mm × 10 mm withdifferent support conditions. When both ends of the columns arefixed, safe crippling load carried by the column was found to be 60× 103 N. Suggest the length for other three columns for the samecrippling load when the support conditions are changed to one endfixed but the other end free, both the ends hinged and one endfixed but the other end hinged. The cross section of the column iskept constant in all cases, and E = 200 GPa. Take factor of safety= 4. Instead of T section, a hollow column of same material havinglength 5 m and external diameter of 55 mm when subjected to acompressive load of 60 kN, there was a shortening in the length ofthe column by 0.120 cm. Suggest a suitable value for the thicknessof the column to withstand the safe crippling load when one end ofthe column is fixed and other end is free?

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