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Raphael H Grzebieta

Bio: Raphael H Grzebieta is an academic researcher from University of New South Wales. The author has contributed to research in topics: Poison control & Rollover. The author has an hindex of 34, co-authored 237 publications receiving 4230 citations. Previous affiliations of Raphael H Grzebieta include Monash University, Clayton campus & Monash University.


Papers
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TL;DR: In this article, a total of 70 quasi-static tests were conducted on circular 6060 aluminium tubes in the T5, as-received condition and the average crush force, FAV, was non-dimensionalised and an empirical formula established as FAV/MP=72.3(D/t)0.32.

413 citations

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TL;DR: In this article, the authors compared the flexural behavior of empty and void-filled, cold-formed circular hollow sections under pure plastic bending and found that void filling prevented local buckling for very large rotations, whereas multiple plastic ripples formed in the inelastic range for specimens with 74d/t110.

191 citations

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TL;DR: In this article, a series of compression and bending tests carried out on concrete filled double skin tubes (CFDST) were carried out and theoretical models developed to predict the ultimate strength of CFDST stub columns and beams were also described.
Abstract: This paper describes a series of compression and bending tests carried out on concrete filled double skin tubes (CFDST). Theoretical models developed to predict the ultimate strength of CFDST stub columns and beams are also described. Both outer and inner tubes were cold-formed C450 (450 MPa nominal yield stress) square hollow sections (SHS). Four different section sizes were chosen for the outer tubes with a width-to-thickness ratio ranging from 16.7 to 25.0. One section size was chosen for the inner tube which had a width-to-thickness ratio of 20. It was found that there is an increase in ductility for CFDST both in compression and bending when compared to empty single skin tubes. It was also shown there was good agreement between theoretical and experimental results.

186 citations

Journal ArticleDOI
TL;DR: In this paper, the authors presented stub columns tests on concrete-filled double skin sandwich tubes (CFDT) constructed using cold-formed steel tubes and found that CFDT construction was found to have significant increase in strength, ductility and energy absorption over the outer jacket.
Abstract: This paper presents stub columns tests on concrete-filled double skin sandwich tubes (CFDT) constructed using cold-formed steel tubes. The annulus is filled with micro high-strength concrete having compressive cylinder strength of 64 MPa. The outer skin is made of circular hollow sections (CHS), while the inner skin is made of square hollow sections (SHS). Eight different section sizes were used for the outer skin with diameter-to-thickness ratio ranging from 19 to 55. Three section sizes were chosen for the inner skin with width-to-thickness ratio in the range of 20 to 26. The CFDT construction was found to have significant increase in strength, ductility and energy absorption over the outer jacket. A simplified formula is derived to determine the compressive capacity of CFDT and compared against the current design rules. The proposed formula was found in good agreement with experimental results. This paper also verifies the yield slenderness limit (λey) of 82 specified in AS 4100 for cold-formed CHS stub columns.

176 citations

Journal ArticleDOI
TL;DR: In this article, an experimental and analytical investigation of hollow and concrete filled steel square hollow (SHS) section beams subjected to low velocity, large mass transverse impacts at the beam mid-span was conducted.

167 citations


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31 Mar 2009
TL;DR: The World report on child injury prevention with support from many experts has been published by the World Health Organization and UNICEF as mentioned in this paper, which documents the magnitude, risks and prevention measures for child injuries globally, particularly for drowning, burns, road traffic injuries, falls and poisoning.
Abstract: Every year, around 830 000 children die from unintentional or "accidental" injuries. The vast majority of these injuries occur in low-income and middle-income countries. However, dozens of prevention strategies and programmes exist. If they were integrated into other child survival programmes and implemented on a larger scale, many of these deaths and much of the injury-related disability could be prevented. Improved health services could also go a long way in reducing the consequences of these injuries.To draw attention to this important public health problem and the possible solutions, WHO and UNICEF have produced this World report on child injury prevention with support from many experts. The report documents the magnitude, risks and prevention measures for child injuries globally –particularly for drowning, burns, road traffic injuries, falls and poisoning. The report makes seven concrete recommendations for policy-makers to improve child injury prevention. This new document is an important policy and advocacy tool for raising attention the issue and guiding action around the world.

1,030 citations

Journal ArticleDOI
TL;DR: In this paper, the development of the family of concrete-filled steel tubular structures to date and drawing a research framework on CFST members is reviewed and discussed, and the current design approaches from various countries are examined briefly.

940 citations

Journal ArticleDOI
TL;DR: In this paper, the use of FRP (Fibre Reinforced Polymer) to strengthen steel structures has become an attractive option which may produce confident retrofitting of existing structures.

879 citations

Journal ArticleDOI
TL;DR: In this article, the common shapes of collapsible energy absorbers and different modes of deformation of the most common ones are reviewed, such as axial crushing, lateral indentation, lateral flattening, inversion and splitting, while noncollapsible systems such as lead extrusions or tube expansions are considered to be beyond the scope of this review.
Abstract: This paper reviews the common shapes of collapsible energy absorbers and the different modes of deformation of the most common ones. Common shapes include circular tubes, square tubes, frusta, struts, honeycombs, and sandwich plates. Common modes of deformation for circular tubes include axial crushing, lateral indentation, lateral flattening, inversion and splitting. Non-collapsible systems, such as lead extrusions or tube expansions, are considered to be beyond the scope of this review.

590 citations