Direct-formed and continuous-formed rectangular hollow sections - Comparison of static properties

作者：Sun Min; Packer Jeffrey A^*

来源：Journal of Constructional Steel Research, 2014, 92: 67-78.

DOI：10.1016/j.jcsr.2013.09.013

• Rectangular hollow section
• Hollow structural section
• Direct-formed
• Continuous-formed
• Heat treatment
• Tensile behaviour
• Compressive behaviour
• Longitudinal residual stress

This paper compares the static properties of a total of seven cold-formed rectangular hollow sections (RHS) manufactured by different methods: (1) direct-forming, (2) continuous-forming, and (3) continuous-forming plus stress-relieving by heat treatment. The static properties compared are: (1) tensile stress-strain behaviour and ductility around the cross-section, (2) compressive stress-strain behaviour of the entire cross-section, and (3) longitudinal residual stress around the cross-section. The maximum values of longitudinal compressive residual stresses estimated from the stub column test results are used to check the accuracy of the longitudinal residual stress measurements from strips. Finally, the measured longitudinal residual stress gradients are incorporated into column models to study the column behaviour of RHS with different production histories. It is found that, in general, the static properties of a direct-formed RHS are midway between those of its continuous-formed and continuous-formed-stress-relieved counterparts.

• 出版日期2014-1