This included the role of residual stresses, the role of geometric stress concentrations and the size of undetected notches. This Interim Advice Note introduces technical amendments to BS5400: Part 4: 1990 which are. There were however some major areas containing differences in assumptions which were not resolved. This ensured that the fundamental principles were harmonised between the two drafts as much as possible. The results of the TWIUMIST work were made available to the Aachen group. This was taking place at the same time as the TWIUMIST redrafting work for BS 5400-3.
The technical development of Part 1-10 was carried out with the assistance of the materials group at Aachen University. In the 1990s a major review of the BS 5400-3 material toughness rules was carried out by TWI and UMIST for the Highways Agency, which resulted in a more comprehensive set of rules which were included in a major revision of BS 5400-3 in 2000.ĭuring this period a project team was set up by CENTC250SC3 to consider all the comments of the members, (National Standards Bodies), on ENV. The resulting thickness limits for the various steel grades and Charpy qualities showed similar trends but some significant differences in values.ĭD ENV, however, has never been used for designs in the UK.
Bs 5400 Part 2 Pdf trial#
There was a two year trial period M Ogle, S Chakrabarti 2 during which designers around Europe were intended to apply it. This resulted in the publication of DD ENV which contained a section with simplified Charpy requirements.ĭD ENV also contained informative Annex C which introduced parameters to take account of loading rate and consequences of failure which BS 5400 did not address.
Bs 5400 Part 2 Pdf code#
The BS 153 thickness range was amended to take account of these new steels.Įxtensive work on fracture research for welded joints which started after World War II was continued into the 1960s and 1970s.Īs a result of improved understanding of the factors affecting fracture risk, including CTOD properties, residual and applied stresses, flaw size, temperature, rate of straining etc, further amendments to the bridge fracture rules were made, including those in the Merrisons Box Girder Rules3 in the early 1970s and eventually those in the new limit state code BS 5400-34 in 1982.Īlmost identical rules were incorporated in BS 5950-15 for selection of Charpy requirements for buildings at about this time. It was also an important factor towards the publication of the first British Standard designed specifically for readily weldable structural steels, BS 43602 in 1968, which provided steels with improved chemistry and a wider range of Charpy properties. This resulted in an amendment to BS 153, Part 11 in 1966 which restricted the thicknesses of tension members in terms of the very limited Charpy grades available at the time. Background to Development of Material Toughness Requirements for Bridges The brittle fractures on the Kings Bridge in Melbourne in 1962 brought the subjects of material toughness and weldability of welded steelwork into sharp focus around the world.