Thesis-Fatemeh Azhari-Final.pdf (10.92 MB)

Mechanical properties of ultra-high strength (Grade 1200) steel under cooling phase of a fire

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posted on 28.08.2018, 02:59 by FATEMEH AZHARI
This thesis mainly investigates the post-fire mechanical properties of ultra-high strength steel (UHSS). Tensile coupon tests are carried out on UHSS standard coupons under realistic fire conditions with and without sustained axial loads. A material model is developed which describes the post-fire stress-strain behaviour of UHSS. The mechanical response of UHSS under extreme cooling conditions is also evaluated. The steel grade effect is studied by conducting similar experiments on lower steel grades. The microstructures of the tested materials are evaluated using optical and scanning electron microscopy methods. Manufacturing process effect on the post-fire behaviour of UHSS tubes is also investigated. Using the results of this study, guidelines can be added to the standards to take into account the in-fire and post-fire stress-strain response of UHSS materials.

History

Campus location

Australia

Principal supervisor

Amin Heidarpour Esfarjani

Additional supervisor 1

Xiao-Ling Zhao

Year of Award

2018

Department, School or Centre

Civil Engineering

Course

Doctor of Philosophy

Degree Type

DOCTORATE

Faculty

Faculty of Engineering

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