薄壁不锈钢材料性能与圆管柱轴心受压性能的试验研究

his paper presents experimental investigation on hot-roll and cold-formed thin-wall pin-ended stainless steel tubular columns in axial-compression, achieves the tensile and compressive properties as well as the mechanical properties of tubular columns including loading phenomenon, failure modes, ultimate loads and initial imperfections. Besides, the expressions are proposed for determining the stability factor of axially loaded compression members. It is shown that the stress-strain model proposed by Quach is fit for austenitic 304 hot-roll and cold-formed stainless steel. The initial imperfection of long columns is recommended as 1/2000 of the length. Comparing with the test results, the proposed expressions produce reliable calculation, and may be directly used in practical design and incorporated into future design codes and guidelines.