Francois Hanus, Nicolas Caillet, Sylvain Gaillard and Olivier Vassart
This paper aims to describe coupon tests performed at elevated temperatures on S355 to S500 steel grades and comparison of test results with previous research studies and current…
Abstract
Purpose
This paper aims to describe coupon tests performed at elevated temperatures on S355 to S500 steel grades and comparison of test results with previous research studies and current EN 1993-1-2 material laws. The objective is to state if these steel grades satisfy to the current material laws and if the scope of application of these laws could be extended to S500 grades.
Design/methodology/approach
Two experimental programmes were launched to investigate the behaviour of S460M and S500M steel grades developed for hot-rolled sections. The first research programme was focussed on a comparison between S355 and S460 grades, where the second experimental programme was focussed on the recently developed S500M steel grade. The latter one comprised steady-state tests, transient-state tests and two large-scale beam tests.
Findings
Results of steady-state and transient-state tests correlate well with the reduction factors defined in EN 1993-1-2, currently limited to S460 grade. On the basis of this study, the scope of EN 1993-1-2 applies to S500 grades. For steady-state tests, the testing procedure (with and without acceleration after Rp0,2) led to noticeable differences. Transient-state tests, which are not standardised up to now, have been performed considering 5 K/min and 10 K/min constant heating rates. The slowest rate leads to lower strengths as creep effects are more significant. However, all the results are in line with EN 1993-1-2 material law. Importance should be given to the reference yield strength of steel at ambient temperature.
Originality/value
The revision of EN 1993-1-2 is on-going and this piece of work provides a contribution for extending the scope of application of material law of steel under fire conditions.
Details
Keywords
Sarah Louise Parry, Natalie A. Carr, Leanne J. Staniford and Lucy Walker
Young adults have been particularly adversely affected by COVID-19-related disruptions, especially in relation to industries with an over-representation of young adults. This…
Abstract
Purpose
Young adults have been particularly adversely affected by COVID-19-related disruptions, especially in relation to industries with an over-representation of young adults. This study, a report, aims to discuss the findings from survey data from young adults who reported poorer mental health comparative to older generations prior to the pandemic. Drawing on the international literature and the research findings, the authors propose recommendations for rebuilding the workplace post-pandemic to support young adult's mental health.
Design/methodology/approach
Data from 1,999 respondents from 200 organisations in the UK were sought in relation to workplace well-being and mental health through a 15-item multiple choice online survey. Overall, 17% of the sample were senior management, 31% junior management, 37% in non-management roles and a further 15% stated “other”. Exploratory quantitative analyses were undertaken to assess differences in responses to questions between age groups.
Findings
Participants in the 16–25-year-old age group were more likely than any other age group to report that work adversely affected their mental health, that their mental health challenges influenced their performance at work, that they had witnessed colleagues' employment negatively influenced by mental health challenges and they felt more comfortable citing physical health challenges for absence than mental health difficulties.
Originality/value
COVID-19-related disruptions meant a large-scale move to remote working for many people. As we return to physical workplaces, we have an exciting opportunity to reform and improve the status quo. The findings, in relation to the mental health of young adults, highlight key risk factors that need to be addressed.