• Reliability assessment of the South African wind load design formulation 

      Botha, J.; Retief, J. V.; Viljoen, C. (South African Institution of Civil Engineering, 2018-09)
      ENGLISH ABSTRACT: The representation of the strong wind climate and the reliability calibration of wind loading are the main components of the provisions for local conditions in the South African wind load standard. The ...
    • Residential water information management 

      Jacobs, H. E. (AOSIS OpenJournals, 2008-12)
      The hitherto undefined term 'water information management' (WIM) as it relates to residential water use is defined in this article as follows: 'To better manage the information pertaining to how and when water is used at ...
    • Resistance model uncertainty factors for ultimate limit state design of pile foundations 

      Dithinde, Mahongo; Retief, Johan V. (South African Institution of Civil Engineering, 2014-08)
      ENGLISH ABSTRACT: The current limit state design procedure for pile foundations presented in geotechnical codes (e.g. SANS 10160-5, EN 1997-1) stipulates that, when the pile capacity is determined using an analytical ...
    • Review of climatic input data for wind load design in accordance with SANS 10160-3 

      Goliger, Adam M.; Retief, Johan V.; Kruger, Andries C. (South African Institution of Civil Engineering, 2017-12)
      ENGLISH ABSTRACT: With the publication of Part 3 Wind Actions of the South African Loading Code SANS 10160:2010, several issues concerning adjustments from the reference standard Eurocode EN 1991-1-4:2004 could not be ...
    • Revised regional sediment yield prediction methodology for ungauged catchments in South Africa 

      Msadala, V. C.; Basson, G. R. (South African Institution of Civil Engineering, 2017-06)
      ENGLISH ABSTRACT: This paper presents the research on the revision of the regional probabilistic method (Rooseboom et al 1992) for the prediction of catchment sediment yields in South Africa. The determination of sediment ...
    • Rocking shear wall foundations in regions of moderate seismicity 

      Van der Merwe, Johann E.; Wium, Jan (South African Institution of Civil Engineering, 2013-10)
      ENGLISH ABSTRACT: This paper presents a study which investigates the feasibility of a concept to reduce the size of shear wall foundations for earthquake forces in regions of moderate seismicity. The approach is to allow ...
    • Seismic evaluation of the northbound N1/R300 bridge interchange 

      Solms, M. N.; Haas, T. N. (South African Institution of Civil Engineering, 2016)
      The design of the Stellenberg Interchange was finalised in 1982, with construction completed in 1986. The bridge was designed using a code of practice which did not include any requirements for seismic excitation. This ...
    • Sewer network design : heuristic algorithm for hydraulic optimisation 

      De Villiers, N.; Van Rooyen, G. C.; Middendorf, M. (South African Institution of Civil Engineering, 2017-09)
      ENGLISH ABSTRACT: For a given sewer network layout and choice of pipe material, the total installed cost of the network is determined mainly by the pipe diameters and slopes. Hydraulic design optimisation is the task of ...
    • Sewer network design layout optimisation using ant colony algorithms 

      De Villiers, Nico-Ben; Van Rooyen, G. C.; Middendorf, Martin (South African Institution of Civil Engineering, 2018)
      The optimal design of sewer networks typically comprises two sub-problems. The first is to determine an optimal layout of the network elements, and the second to optimally design the network components. In this article the ...
    • Stormwater pond efficiency determinations with the effluent probability method : the use of mass versus concentration parameters 

      Brink, I. C.; Kamish, W. (South African Institution of Civil Engineering, 2016)
      Use of the concentration parameter has in the past generally been favoured in stormwater structure efficiency determinations, and specifically with use of the Effluent Probability Method. However, efficiency is by definition ...
    • Stormwater pond metals and solids removal efficiency determination with the effluent probability method : a novel classification system 

      Brink, I. C.; Kamish, W. (South African Institution of Civil Engineering, 2016)
      This technical note contains findings from a larger research project into the design of stormwater detention and retention ponds for removal of metals and solids. The project required a standard system with which case ...
    • Strong winds in South Africa : part 1 : application of estimation methods 

      Kruger, A. C.; Retief, J. V.; Goliger, A. M. (South African Institution of Civil Engineering, 2013-08)
      The accurate estimation of strong winds is of cardinal importance to the built environment, particularly in South Africa, where wind loading represents the dominant environmental action to be considered in the design of ...
    • Strong winds in South Africa : part 2 : mapping of updated statistics 

      Kruger, A. C.; Retief, J. V.; Goliger, A. M. (South African Institution of Civil Engineering, 2013-08)
      Although wind is the most important environmental action on buildings and structures in South Africa, the last comprehensive strong wind analysis was conducted in 1985. The current wind loading code is still based on the ...
    • Study of the Durban Bight shoreline evolution under schematised climate change and sand‑bypassing scenarios 

      Rautenbach, Christo; Theron, Andre K. (South African Institution of Civil Engineering, 2018-12)
      ENGLISH ABSTRACT: The Durban Bight beaches, on the KwaZulu-Natal coast of South Africa, have been the topic of several studies in the past, because of their recreational and economic value. These beaches are mainly nourished ...
    • A study on the design and material costs of tall wind turbine towers in South Africa 

      Way, A. C.; Van Zijl, G. P. A. G. (South African Institution of Civil Engineering, 2015)
      ENGLISH ABSTRACT: The aim of this project was to study the structural design and material costing of various designs of tall wind turbine towers and the associated foundations in a South African context. Design guidelines ...
    • Supplementary household water sources to augment potable municipal supply in South Africa 

      Nel, Nicole; Jacobs, Heinz Erasmus; Loubser, Carlo; Du Plessis, Kobus (South African Water Research Commission, 2017-10)
      ENGLISH ABSTRACT: This paper addresses on-site supplementary household water sources with a focus on groundwater abstraction, rainwater harvesting and greywater reuse as available non-potable water sources to residential ...
    • A tool to increase information-processing capacity for consumer water meter data 

      Jacobs, Heinz E.; Fair, Kerry A. (AOSIS Publishing, 2013)
      Background: Water service providers invoice most South African urban consumers for the water they use every month. A secure treasury system generates water invoices at municipalities’ financial departments. Information ...
    • Traffic characteristics and bridge loading in South Africa 

      Lenner, Roman; De Wet, Gerhard; Viljoen, Celeste (Journal of the South African Institution of Civil Engineering, 2017-12)
      ENGLISH ABSTRACT: The loading model of the Technical Manual for Highways (TMH-7) published for bridge design in South Africa is in need of revision and simplification. The frequency of heavy vehicle loads has increased ...
    • Uncertainties in the South African wind load design formulation 

      Botha, Jacques; Retief, Johan V.; Viljoen, Celeste (South African Institution of Civil Engineering, 2018)
      This paper presents an investigation of the uncertainties inherent in the South African formulation of design wind loads on structures, as stipulated by SANS 10160-3:2011. The investigation follows from the identification ...