Browsing Research Articles (Civil Engineering) by Issue Date

Browsing Research Articles (Civil Engineering) by Issue Date

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  • Deterioration of rail track geometry 
    Kearsley, Elsabe P.; Van As, S.C. (South African Institution of Civil Engineering, 1995)
    The condition of a railway track tends to deteriorate with time. The objective of this paper is to investigate this deterioration and to determine whether improvements in track geometry can retard the deterioration, and ...
  • Applicability of the Eurocode timber connector design formulae to connections in round poles 
    Burdzik, W.M.G. (South African Institution of Civil Engineering, 1997)
    The Eurocode 5 (1995) timber connection design formulae are discussed briefly and applied to the usual standard bolted or nailed South African round timber pole connections to obtain theoretical strengths. These theoretical ...
  • Some round timber pole connections 
    Burdzik, W.M.G. (South African Institution of Civil Engineering, 1997)
    The paper looks at alternative round timber pole connections that make monoplanar structures and trusses a possibility. Three different systems are discussed and where test results are available, these are compared with ...
  • A limit states approach to flexural ductility of plain steel beams used in plastic design 
    Dekker, N.W. (South African Institution of Civil Engineering, 1999)
    In order to validate the principal assumptions inherent to plastic design of frames and continuous beams, it is necessary to predict the available rotation capacity at positions in the structure where plastic hinges are ...
  • Bracing of timber roofs 
    Burdzik, W.M.G.; Dekker, N.W. (South African Institution of Civil Engineering, 1999)
    Problems attributed to the bracing of timber roofs have necessitated a fresh look at the bracing criterion given in the timber design code, SABS 0163 (1994). The difference between bracing provided for stability of the ...
  • New timber column design equations - new formulations and modulus of elasticity values 
    Burdzik, W.M.G. (South African Institution of Civil Engineering, 2002)
    Recent bending and compression tests on currently produced SA pine and low-density Eucalyptus saligna have shown that the fifth percentile modulus of elasticity, MOE, is lower than the values published in SASS 0763 ...
  • The buckling resistance of hollow circular members with flattened end-connections 
    Dekker, N.W. (South African Institution of Civil Engineering, 2002)
    Circular hollow sections are commonly used in lattice towers. The geometry of hollow circular sections provides particularly effective compression members. Fully developed welded endconnections are generally considered ...
  • Comparison between bracing requirements using various codes and a proposed new set of bracing criteria 
    Burdzik, W.M.G.; Dekker, N.W. (South African Institution of Civil Engineering, 2002)
    The notable increase in problems related to the bracing of timber roofs clearly indicates that the time is ripe to seriously consider amended rules governing the design of such bracing. Burdzik et a1 have proposed a set ...
  • A rational approach to the design of bracing to resist stability forces and a review of the CSA 51 6.1-99 proposals 
    Dekker, N.W.; Burdzik, W.M.G. (South African Institution of Civil Engineering, 2002)
    complex interaction between the bracing system and the member. Most studies have involved sophisticated computer analysis and as such the behavioural aspects have been clouded, especially when the results of such studies ...
  • Job creation possibilities by using round-end cut truss webs in the manufacture of timber trusses 
    Burdzik, W.M.G. (South African Institution of Civil Engineering, 2002)
    This paper discusses the concept of round-end cut webs for timber trusses. Punched steel gusset plates that are nailed by means of individual nails may be used for site assembly of trusses with round-end webs. Nailed ...
  • The effect of fly ash properties on concrete strength 
    Kearsley, Elsabe P.; Wainright, P.J. (South African Institution of Civil Engineering, 2003)
    Fly ash or pulverised fuel ash is a by-product of the combustion of pulverised coal in thermal power plants. The recognition that fly ash frequently exhibits pozzolanic properties has led to its use as a constituent of ...
  • Effect of ductility on load-carrying capacity of steel fibre reinforced concrete ground slabs 
    Kearsley, Elsabe P.; Elsaigh, W.A.M. (South African Institution of Civil Engineering, 2003)
    Steel fibre reinforced concrete (SFRC) is increasingly being used for ground slab applications. The addition of steel fibres to concrete imparts significant post-cracking ductility (toughness). This ductility is used to ...
  • The seismic cone test 
    Heymann, Gerhard (South African Institution of Civil Engineering, 2003)
    The seismic cone test is an in situ test used to measure body wave velocities in soils. Geotechnical parameters that may be derived from the test include void ratio, small strain stiffness and Poisson's ratio. In addition, ...
  • Analysis of timber girder trusses for eccentric loading 
    Burdzik, W.M.G. (South African Institution of Civil Engineering, 2004)
    Recent timber trussed roof failures in South Africa, especially in Gauteng, of large-span trusses have necessitated a rethink about the analysis of timber trusses in general, but especially primary girder trusses, which ...
  • Generic formulation of member strength as a step towards a unified structural code 
    Dekker, N.W.; Burdzik, W.M.G.; Marshall, Vernon (South African Institution of Civil Engineering, 2004)
    The structural design codes particular to the various structural materials appear to have developed in isolation. Structural mechanics, methods of analysis and limiting-stress-based calculations are common to all materials. ...
  • A rational approach to obtaining effective lengths of compression members in framed structures 
    Dekker, N.W.; Burdzik, W.M.G. (South African Institution of Civil Engineering, 2005)
    With the common and widespread use of PC-based design packages in the design of Steel Structures, it is of fundamental importance to revisit the basic principles contained in and sometimes omitted from common analysis ...
  • The effect of the relative slip between plies of multiple-ply timber girder trusses subjected to single face loading 
    Burdzik, W.M.G. (South African Institution of Civil Engineering, 2005)
    Certain three-dimensional effects are sometimes ignored in the analysis of multiple-ply timber girder trusses that are loaded on one face of the combined truss, namely relative slip between the trusses and torsion. The ...
  • Collapse potential of partly saturafed sandy soils from Mozal, Mozambique 
    Rust, Eben; Heymann, Gerhard; Jones, Gary (South African Institution of Civil Engineering, 2005)
    There is an upsurge in development along the eastern coast of southern Africa that creates the need to re-examine the typical red sands which occur from northern Mozambique to the south coast of KwaZulu-Natal in South-Africa.
  • Shear wave velocity of gold tailings 
    Chang, H.P.N.; Heymann, Gerhard (South African Institution of Civil Engineering, 2005)
    To evaluate the liquefaction potential of tailings impoundments, the in situ void ratio and the effective stresses are required. While stresses can be estimated with relative accuracy,the void ratio of tailings has proved ...
  • Effective stiffness of nailed multiple-ply timber members 
    Burdzik, W.M.G. (South African Institution of Civil Engineering, 2006)
    In timber roofs, multiple-ply trusses are placed next to each other and the web members are held together with nails. This paper presents various methods, among which is a simple spring model, whereby the effective stiffness ...