R. B. Petersen
University of Newcastle
EngineeringUnreinforced masonry buildingSoil scienceSoil waterComposite materialCalibrationMining engineeringMoistureGeotechnical engineeringMetallurgyMaterials scienceSTRIPSCorrosionWater contentFerrousCast ironClay brickIn plane shearLocalised corrosionEnvironmental sciencePolymerMasonryTerm (time)Structural engineeringReinforcementBondFibre-reinforced plasticShear (geology)
18Publications
9H-index
215Citations
Publications 18
Newest
#1R. B. Petersen (University of Newcastle)H-Index: 9
#2Tony Wells (University of Newcastle)H-Index: 15
Last. Robert E. Melchers (University of Newcastle)H-Index: 62
view all 3 authors...
Parameters characterising the properties of soils used as backfill in immediate contact with cast iron pipes exhumed from a variety of soils after up to 129 years exposure are used together with av...
5 CitationsSource
#1Robert E. Melchers (University of Newcastle)H-Index: 62
#2R. B. Petersen (University of Newcastle)H-Index: 9
Last. Tony Wells (University of Newcastle)H-Index: 15
view all 3 authors...
ABSTRACTEmpirical models are proposed for the progression of maximum depth of localised corrosion of cast iron pipes, based on data for pipes buried in 67 different backfill clay and sandy soils fo...
7 CitationsSource
#1R. B. Petersen (University of Newcastle)H-Index: 9
#2Robert E. Melchers (University of Newcastle)H-Index: 62
ABSTRACTThe corrosion of steels in clay soils is of interest for buried steel infrastructure. To obtain better information about the early corrosion effects, mild steel coupons were exposed for 3, ...
11 CitationsSource
#1Robert E. Melchers (University of Newcastle)H-Index: 62
#2R. B. Petersen (University of Newcastle)H-Index: 9
Last. Tony Wells (University of Newcastle)H-Index: 15
view all 3 authors...
ABSTRACTData from the US NBS study for corrosion of buried objects are employed to show that average annual atmospheric precipitation directly influences corrosion of ferrous objects buried in various soils. This is attributed to the softness of precipitation waters and their delivery of oxygen. Also, as surrogate for time of wetness at the buried object within the soil, atmospheric precipitation has a clearer effect on corrosion loss and localised corrosion than does ground surface time of wetn...
9 CitationsSource
#1R. B. Petersen (University of Newcastle)H-Index: 9
#2Robert E. Melchers (University of Newcastle)H-Index: 62
Abstract Corrosion loss data from the 1957 NBS study for steels buried in a large variety of soils and exposed over 12–17 years are re-interpreted, supported with estimates for scatter in the data. This shows that losses predominantly are consistent with the bi-modal trending pattern also previously observed for steel exposed in a variety of other environments. For short-term and low time of wetness exposures the trends are consistent with mode 1 of the bi-modal trend. These reinterpretations sh...
13 CitationsSource
#1Robert E. Melchers (University of Newcastle)H-Index: 62
#2R. B. Petersen (University of Newcastle)H-Index: 9
ABSTRACTData published in the 1957 Romanoff National Bureau of Standards report for the corrosion of steels buried in soils for up to 17 years are re-interpreted using the bi-modal model for corrosion in wet environments. The relevant soil properties are those of the backfill, not those of the undisturbed soil at the depth of the steel samples. Using estimated backfill properties shows that stiff clays, calcareous loams and gravelly loams corrosion transitioned from Mode 1 to Mode 2 after 4–8 ye...
18 CitationsSource
#1R. B. PetersenH-Index: 9
#2Robert E. MelchersH-Index: 62
The corrosion of old buried cast iron water mains is a problem for the Australian Water Industry. To better manage their assets the industry requires a way of predicting the remaining service life of their pipes. In order to do this a predictive model of long-term corrosion loss with time is required. This paper describes ongoing work being conducted at The University of Newcastle to develop corrosion loss models for cast iron pipes in soils, as a function of exposure time and soil environment. ...
13 Citations
#1K. M. C. Konthesingha (University of Newcastle)
#2Mark J. Masia (University of Newcastle)H-Index: 12
Last. Adrian Page (University of Newcastle)H-Index: 19
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Abstract An experimental study was conducted to assess the effect on strength and ductility of retrofitting unreinforced masonry (URM) shear panels with near surface mounted (NSM) carbon fibre reinforced polymer (CFRP) strips. A total of sixteen wall panels, 1200 mm × 1200 mm, were subjected to vertical pre-compression combined with increasing reversing cycles of in-plane lateral displacement. All wall panels were previously tested (prior to retrofitting) under compression and cyclic shear using...
35 CitationsSource
#1R. B. PetersenH-Index: 9
#2M. DafterH-Index: 1
Last. Robert E. MelchersH-Index: 62
view all 3 authors...
The external corrosion of buried cast iron water mains is a significant problem for the Australian Water Industry. To improve maintenance and replacement strategies for these mains the water industry requires a method to estimate their remaining service lives. Predictions of long-term corrosion losses, pit depths and pitting extents are therefore required. A conceptual model for the prediction of long-term corrosion has been developed and the external soil conditions influencing corrosion were i...
3 Citations
#1R. B. Petersen (University of Newcastle)H-Index: 9
#2Najif Ismail (University of Auckland)H-Index: 12
Last. Jason Ingham (University of Auckland)H-Index: 29
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Abstract A numerical study was conducted to investigate the in-plane shear behaviour of unreinforced masonry wallettes strengthened with twisted stainless steel reinforcing bars. A two-dimensional finite element model was used to simulate the behaviour of strengthened wallettes tested in diagonal tension in a recent experimental programme. The test wallettes included single leaf modern masonry construction and double leaf historical masonry construction. The main aims of the current study were t...
18 CitationsSource