G550高强钢构件的受压稳定

Compression Stability of High Strength G550 Steel Members

应力等级为G550(屈服强度和抗拉强度都是550MPa)的钢材是一种典型的厚度不到1mm的高强冷轧钢板,许多年来这种钢材一直被用作护墙板或盖板,但是现在被用作结构构件,例如屋面桁架和钢框架房屋中的墙架。这种钢材应变硬化低,抗拉强度和屈服应力的比值是1.0。本文概述了悉尼大学有关这种钢材稳定的一个主要研究项目。进行了短柱和长柱受压构件的试验并和设计规范以及有限元分析进行了对比。

High strength cold-reduced steel is typically of stress grade G550 （550 MPa nominal yield and tensile strength） and ie.s.s than 1 mm thick. The steel has been used for many years for sheeting and decking but is now being used for struc-tural members such as roof trusses and stud walls of steel framed houses. The steel has low strain hardening with a tensile to yield stress ratio of 1.0. The paper summarises a major research program on the stability of this steel at The University of Sydney. Short and long column compression members have been tested and compared with design stand-ards and finite element analyses.