Now showing items 22-36 of 36

    • Lateral loads applied by pedestrians at normal walking velocities. 

      Archbold, Paul; Mullarney, Brian (Taylor & Francis, 2011)
      The issue of horizontal loading from pedestrians has received increased attention from bridge designers and researchers in the past decade, primarily due to notable instances of excessive vibration of structures subjected ...
    • Measurement of time-dependent colour variation in concrete. 

      Deegan, Peter; O'Connor, Alan; Archbold, Paul (BCRI, 2012-09)
      The phenomenon of colour variation in finished concrete has become a contentious issue in recent years as engineers and designers strive, not only for blemish free finishes, but crisp “white” concretes with uniformity ...
    • Modelling the vertical loads applied by pedestrians at a range of walking velocities. 

      Mullarney, Brian; Archbold, Paul (AJBAS, 2013)
      Over the past half century numerous high profile bridges such as the Brooklyn Bridge, the London Millennium Bridge, and the Auckland Harbour Bridge have been subject to pedestrian induced vibrations due to walking. In this ...
    • Nonlinear finite element of FRP reinforced concrete structures. 

      Tharmarajah, Gobithas; Archbold, Paul (BCRI, 2012-09)
      reinforcement is a non-corrosive alternative to steel and is gaining popularity for use in reinforced concrete structures exposed to corrosive environments. A major difference between the two reinforcing materials is their ...
    • Oat husk ashes as supplementary cementitious material 

      Bonifacio, Alysson Larsen; Archbold, Paul (Technological University of the Shannon Midlands Midwest, 2022)
      Supplementary cementitious materials (SCMs) are recognized and utilized to minimize cement use; however, several waste sources now employed for partial cement replacement are under threat for changes in industrial production ...
    • A parametric study of pedestrian vertical force models for dynamic analysis of footbridges. 

      Archbold, Paul; Keogh, Joseph; Caprani, Colin C.; Fanning, Paul (2011-10)
      Footbridge vibration has received much attention in recent years. However, stochastic models for crowd loading are not common, and estimation of crowd-induced vibration is typically done through enhancement factors applied ...
    • Preliminary characterisation of natural fibres for enhancement of concrete 

      da Costa Santos, Ana Caroline; Archbold, Paul (Athlone Institute of Technology, 2018-04-24)
      Reinforced concrete with steel is one of the most used construction materials in the world. The addition of short bio-based fibres into the concrete mixture for the production of elements lightly loaded can avoid concrete ...
    • Suitability of selected natural fibres for concrete performance improvement. 

      da Costa, Ana Caroline; Archbold, Paul (2020)
      The addition of fibres to reinforce concrete (FRC) is required when concrete structures may be submitted to other types of stresses beyond the compressive. Post-crack tensile strength, resistance to abrasion and additional ...
    • Suitability of surface-treated flax and hemp fibers for concrete reinforcement 

      da Costa Santos, Ana Caroline; Archbold, Paul (MDPI, 2022-11-17)
      The use of vegetable fibres as a sustainable alternative to non-natural sources of fibres applied for concrete reinforcement has been studied for over three decades. The main issues about plant-based fibres pointed out ...
    • The suitability of vegetable fibres for the reinforcement of concrete 

      da Costa Santos, Ana Caroline (Technological University of the Shannon: Midlands Midwest, 2023)
      The use of vegetable fibres as a sustainable alternative to non-natural fibres for reinforcing concrete was investigated in this research. For plant-based fibres, previous studies have identified issues such as the ...
    • Transient response simulation of a composite material footbridge to crossing pedestrians. 

      Fanning, P.J.; Archbold, Paul; Pavic, A.; Reynolds, P. (CRC Press, 2003)
      Loads applied by pedestrians, and crowds of pedestrians, are particularly important for footbridges with natural frequencies close to footfall frequencies of moving pedestrians. Recorded response data from Aberfeldy Bridge, ...
    • Use of natural fibres to enhance tensile strength of concrete. 

      Seneviratne, R.A.C.J.; Tharmarajah, G. (ICBBM, 2017-06)
      This paper discusses the influence of natural fibres on density, compressive strength and flexural strength of fibre reinforced concrete specimens. Coir fibre extracted from coconut husk was added to high strength concrete ...
    • Variations in vertical loading from walking due to surface vibration. 

      Archbold, Paul; Mullarney, Brian; Carrig, Mirivano (Hemming Information Services, 2014-07)
      Walking trials have been carried out on rigid and flexible walkways mounted with a force plate in order to determine how vertical pedestrian loading is influence by these two walking platforms. This paper presents the ...
    • Vertical crowd load models for vibration serviceability assessment of footbridges 

      Archbold, Paul (Civil-Comp Press, 2009)
      Most pedestrian load models prescribed in existing design codes of practice do not consider any interaction between the pedestrian and the moving structure. However, it is now widely accepted that this interaction is ...
    • Vibration serviceability considerations in footbridge design. 

      Mullarney, Brian; Archbold, Paul (UniMap/AIT, 2011-06)
      Modern footbridges are becoming more and more flexible as they are constructed lighter and more slender than ever before. This has led to a vibration serviceability issue with many footbridges, as they can become ‘lively’ ...