Civil Engineering - RCC Structures Design - Discussion

Please give a answer with the reference.

FOR LONG COLUMN - Ratio of unsupported length between end restraints shall not exceed 60 times the least lateral dimension of column.

The question should be for Steel column.

The answer 50 is correspondence with the Steel column.

Slenderness ratio less than 12 then it is termed as short column and more than 12 then it is a long column.

There is two solution guys,

1) if Le/d>15 long column.
Le/d<15 short column.
where Le=total length of column and d=width.

2) Other method is to find out radius of gyration K= sqrt(I/A) where I=moment of inertia and A= Area.
Le/k>50 than its long column.
Le/k<50 than its short column.

50 for rcc & 80 for steel.

What is slenderness ratio?

I/r is slenderness ration and it should be =<40 / this is for Steel ! Remember.

THIS IS FOR YOUR INFORMATION ,
Short RCC Column =<12.
Long RCC Column >12.
Short Steel column, =<50.
Intermediate Steel Column >40 & <200.
Long Steel Column >200.

If the is column is RCC then the slenderness ratio is more than 12 then it is a long column or if it s less than 12 then it s called short column long column i b 12 or i r.

If the column is steel column then slenderness ratio is more than 12 then it is a long column or If it s less than 12 then it s called short column long column i b 12 or i r.

Dear friends.. this question and Answer is for the Wooden column. but not mentioned in the question.

SR = Leff /r.
Where: Leff= the effective length, which depends on the boundary or end conditions (discussed later) r = the radius of gyration r = √ I/A = moment of inertia of the column Based on the slenderness ratio columns are classified as short, intermediate, and long (slender column).

For example, a wooden column with a Leff /r ratio less than 11 is defined as the short column. Intermediate columns have Leff /r values in the range of 11 to 30. The columns with Leff /r value greater than 30 are defined as a long or slender column.