This paper main union the test on struts eccentricity at both ends,has confirmed the validity of finite element analysis,has carded out the parametric analysis.

Many research on overal stability for eccentrically compressed hot-rolled single angle members has been completed in China and oversea.

A simple and unified formula for design of eccentrically loaded columns and members under thecombined action of compression and lateral loads, which has been adopted in the Chinese Code forDesign of Timber StrUctures, is introduced in this paper.

As a geometric nonlinearity analysis example in non-perfect system,this paper applies the analytical method to solve moment magnification factor of the eccentric compression bar,and uses structure instability judgement criterion of analytical method for the stability analysis.

A novel method to tune the chirp ratio of fiber grating without the central wavelength shift is proposed using a two-fixed-end compressive bar which induces a linear strain distribution along the grating.