This paper reports a thorough experimental investigation into the material properties and
membrane residual stresses of S690 high strength steel welded I-sections after exposure to
seven levels of elevated temperatures ranging from 30° C (room temperature) to 950° C.
The experimental programme included heating, soaking and cooling of S690 high strength
steel coupons and welded I-section specimens as well as post-fire material tensile coupon
tests and membrane residual stress measurements, with the experimental rigs, procedures …

This report presents an experimental study and review of the behaviour and characteristics
of welded S690 high strength pi and cruciform steel section members. Ten specimens were
fabricated from S690 steel plates using the method of gas metal arc welding (GMAW), which
include 2 samples of each of the steel section members respectively. To investigate and
understand the behaviour and characteristics of the steel sections, tests such as residual
stress measurements and material coupon tests were conducted. The data results were then …