Civil Engineer in South Africa - Volume 24, Issue 4, 1982
Volume 24, Issue 4, 1982
Author H. ScholzSource: Civil Engineer in South Africa 24, pp 137 –142 (1982)More Less
The results are reported of different effective-length computations used for the design of column members in rectangular unbraced steel frames. A comparison is made between a storey stiffness approach and a study prepared by Kuhn & Lundgren who derived effective-length values for a number of columns using graphs and a rigorous computer solution respectively. The consequences of a variation in effective length have been demonstrated on a column example and a conclusion has been drawn regarding the suitability of the storey stiffness in determining the effective length of columns.
Source: Civil Engineer in South Africa 24, pp 145 –156 (1982)More Less
Om 'n meganistiese ontleding van die spoorbaanplaveisel te kan doen is dit noodsaaklik dat die elastiese-eienskappe van onder andere die ballaslaag bepaal word. 'n Kort beskrywing van die toetsmetode vir die bepaling van die parameter word in die referaat gegee. Daar word ook kortliks aangedui watter faktore 'n invloed het op die gedrag van ballasmateriaal onder herhaalde belastingstoetse tesame met 'n beskyrwing van die voorbereiding van die ballasmonsters met die bepaling van 'n vorm- en skaalfaktor vir gebruik by die ontleding van resultate. Die metode van gradering asook verdigting van die ballasmonster word ook beskryf.
In order to do a mechanistic analysis of the railway pavement structure it is important to establish the elastic characteristics of the ballast. This paper describes the test methods used for determining these parameters as well as the factors which influence the behaviour of ballast material under repetitive loading. Methods for the preparation of samples are discussed with reference to aggregate grading and sample compaction. The effects of particle shape and size were also considered by the determination of a form and scale factor.
Conceptual design and preliminary analysis of structures, D.J. Fraser
Stomwater hydrology and drainage, D. Stephenson. : book reviewSource: Civil Engineer in South Africa 24 (1982)More Less
This book can be seen as an elementary introduction to simplified structural analysis and design, focusing attention on some principles and selected applications rather than providing a thorough and in-depth coverage of the subject matter. The book is subdivided into three parts :
Part 1 : Conceptual design
Part 2 : Basic concepts of structural analysis
Part 3 : Structural behaviour and preliminary analysis.
This book gives a useful and comprehensive guide for the design of urban stormwater drainage systems. It deals with aspects ranging from conceptual alternatives for systems design to detailed hydraulic design of system components.