Analysis Of Instability And Engineering Application For60Degree Steel Angle

With the rapid development of china’s economy, steel structure has been more and more applied in engineering. As an important component of the steel structure, because steel angle has advantages of easy installation and convenient connection, it is widely used in various kinds of steel structure. At present most of angle steel used in project is the steel angle with an angle of90degrees for two limb, by analysing we known that section principal moment of inertia with90degrees is not the maximum compared with the steel angle that two limb included angle is θ. For steel members the section principal moment of inertia is an important influence factors, so it is necessary to analysis stable carrying capacity of the steel angle with an angle of θ.This paper is based on the theory of hin wall component instability, studied the influence of θ on steel angle instability force. Then we compared the results of ANSYS finite element with theoretical analysis and did optimize to θ, based on this, puted forward the concept of60degree steel angle. later we did research into local andglobal stability bearing capacity of60degree steel angle, adopted ANSYS to analyse nonlinear buckling of steel angle, compared the Analysis Results with90degree steel angle and China’s current steel structure standard (GB50017-2003). At last applied60degree steel angle to diagonal member of electrical tower cell, calculated ultimate bearing capacity with cells under different working conditions, contrasted the calculated results to electrical tower cell which diagonal member is90degree steel angle. The Analysis and calculation results of this paper can Provide relevant references to Application in engineering with60degree steel angle.