engineering recuitment MPPGCL JE 2024 Mock Test Design of Steel Structures General Design Principles
In which form is the permissible stress in columns, âfâ is expresses by Merchant - Rankine's formula?
(symbols have their usual meaning)1
\(f \propto \left( {\frac{{{\pi ^2}E}}{{{\lambda ^2}}}} \right)\)
2
\(f \propto \left( {\frac{{{f_y}}}{{1 + 0.2{\rm{sec}}\left( {c.\lambda \sqrt f } \right)}}} \right)\)
3
\(\frac{1}{{{f^n}}} \propto \frac{1}{{f_y^n}} + \frac{1}{{f_e^n}}\)
4
\(f \propto \left( {\frac{{{f_y}}}{{\phi + \surd \left( {{\phi ^2} - {\lambda ^2}} \right)}}} \right)\)