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Partial factors for selected reinforced concrete members: background to a revision of SANS 10100-1
Author: M Holický; J Retief; J Wium | Size: 0.19 MB | Format:PDF | Quality:Original preprint | Publisher: Journal of the South African Institution of Civil Engineering, Vol.52 No.1 | Year: Apr. 2010 | pages: 9 (36-44) | ISSN: 1021-2019
The application of Eurocode EN 1992-1-1 in revising the South African standard for structural concrete design SABS 0100-1:1992 will require the determination of partial factors in accordance with the reliability requirements of the revised South African loading code SANS 10160:2010. The partial material factors γs for steel and γc for concrete are proposed in analysing the reliability of reinforced concrete slabs and short centrically loaded columns. It appears that the partial factors γs = 1,10 and γc = 1,40 are a suitable set of factors to be considered in the foreseen revision of the code. Further research is required on the model uncertainty for different structural members (flexural members, shear, columns, walls) and the theoretical models of basic resistance variables related to quality control.
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Written by a veteran geotechnical engineer with a long record of research discoveries, Constitutive Modeling of Geomaterials: Principles and Applications presents a simple and unified approach to modeling various features of geomaterials in general stress systems. The book discusses the fundamentals of the constitutive modeling of soils and illustrates the application of these models to boundary value problems.
Helping readers easily understand the fundamentals and modeling of soil behaviors, the author first explains the ideas and formulations for modeling soil features in one-dimensional conditions. He then extends the one-dimensional models to three-dimensional models using the tij concept. The text covers the subloading tij model and other methods that describe density, bonding, time effect, and more. Moving on to the practical application of the constitutive models, the author presents the numerical simulations of typical geotechnical problems (numerical modeling) and the corresponding model tests (physical modeling).
Using a framework that leads to a unified set of material parameters, this book shows how to formulate a constitutive model capable of simulating the main features of soil behavior. It not only covers recent methods and models but also uses real test data to prove their reliability.
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Posted by: warbeast - 08-14-2012, 05:27 AM - Forum: Archive
- No Replies
This first volume of the new series, DETAIL engineering, will present the philosophy, working methods and interdisciplinary approach used by the engineers at schlaich bergermann und partner. The presentation of current projects in all of their major aspects, as well as specialist articles by a large number of authors, will show clearly why this engineering office operates successfully as one of the most renowned firms of its type in the world, without losing any authenticity in its work.
Publisher: DETAIL ISBN: 978-3-920034-57-7 Pages: 136 (Large number of graphics and photos ) Format: 23 x 29,7 cm Language: English
CONTENT
007 Preface
008 Interview with schlaich bergermann und partner
018 It’s the spirit and heart of this office that make the difference
Structural design and form
022 How does the estructure get its form?
025 Architects and engineers working in concert
031 Design variations for a high-rise laboratory building
032 From A to Z – from concept to realisation
039 Processes with minimal interfaces
043 New membranas for the Munich Olympic Pool
Materials and innovation
046 Using the material properly in design and construction
049 Experiments with timber
050 Developing new qualities in materials
058 The courage to be innovative with materials and forms of construction
Perspectives and synergies
062 Sunshine = freedom? – Four decades of solar engineering
068 Potential and trendes in the use of solar energy
070 Synergies between solar and structural engineering
075 Research activities in the solar termal field
076 From movable structure to smart system
081 Intelligent Polymer cushions and self-cooling milk packaging
Cooperation and responsability
084 On the self-image of the responsable structural engineer
089 The desire to do things properly
090 Think globally, act locally
094 Cooperation between Boston, New York and Stuttgart
097 Brazilian passion and German rationalism
098 Daring to experiment – current projects with artists
101 On the art of transforming ideas
The didactics of structures
104 Fundamental design principles
112 A bridge as a hands-on (or feet-on) exhibit
Projects and people
116 Catalogue of projects
133 People
136 Reference, picture credits
More info here :
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i need this paper , i can not find any pages on the net for reference ,but i have written the complete name and publisher of this paper here
Housner G. Spectrum intensities of strong-motion earthquakes.
In: Proceedings of the Symposium on Earthquake and Blast
Effects on Structures. CA, USA: Los Angeles, 1952:20–36
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1) Holický, M. (2009). Reliability analysis for structural design. ISBN 978-1-920338-11-4,
SUN MeDIA, Stellenbosch, South Africa.
2)Holický, M., & Retief, J.V. (2010). Probabilistic Basis of Present Codes of Practice, Proceedings of the SEMC conference, Cape Town.
3)Holický, M., Retief, J.V., & Dunaiski, P.E. (2007). The reliability basis of design for
structural resistance. Proceedings of the SEMC conference, Cape Town
4)Holický, M., Retief, J.V., & Wium, J.A. (2010). Partial factors for selected reinforced
concrete members: Background to a revision of SANS 10100-1. SAICE Journal, 52 (1), 36-
44.
Author: Tibor Horváth | Size: 1.87 MB | Format:PDF | Quality:Original preprint | Publisher: John Wiley & Sons, Ltd | Year: 2006 | pages: 220 | ISBN: 978-0-470-03018-9 // 0-470-03018-6
Preface
This book is attached to a computer program, and it gives textual commentaries
to each picture displayed on the screen. The computer program can be used without
this book, because the same commentary can be also displayed and read on the
screen. It depends on the decision of the user, whether the printed or the displayed
text will be preferred. The book cannot be properly used without the computer
program.
The author developed this program for illustration of the special course
LIGHTNING PROTECTION at the Budapest University of Technology and
Economics. The series of this course began about 20 years ago and now more than
100 students choose it in each semester. Projecting this program, the lecturers
almost never found it necessary to use blackboard and crayon. The examinations
verified that many students learned, with good results, from this program. The
success encouraged me to develop this version, which also contains on-screen
comments and their printed form. Therefore, it can be an excellent medium for
individual study at home. To understand some special subjects, fundamental
knowledge of mathematics and physics is necessary, although most topics do not
need them. It has been demonstrated by the great success of the presentation of the
Chapter ‘The mankind in the thunderstorm’ for little children at a nursery in
Budapest and for the students at Stanford University in USA.
Lightning was the first electrical phenomenon seen by prehistoric man,
although over 1000 years passed until scientists discovered its processes and
properties. In spite of our knowledge today lightning is still a mysterious
phenomenon. This program tries to give a fundamental knowledge about lightning
from the meteorological phenomena to the proper behaviour in open terrain during
the thunderstorm. The development of a lightning flash involves many interesting
processes, which are usually unknown. The computer animation can spectacularly
illustrate them, and shows how complex a phenomenon lightning is. However, the
investigations have discovered many details of the lightning process, though many
secrets remain unexplored. One of them is ball lightning, for which the final
solution is unknown in spite of several theories. Nevertheless, the most important
aim of investigations is the protection against danger and damage due to lightning.Concerning this aim, the first question is: Where will be the point of strike?
According to our theory, it would be on the air termination system, avoiding the
structure to be protected. Since the time of Benjamin Franklin up to now, a
protected space has been presumed into which the air termination excludes the
penetration of lightning stroke. Several lightning strokes demonstrated that no
completely protected space exists and our knowledge about the striking process
initiated a probabilistic approach to this problem. The PC program deals with this
topic on the base of a new theory and calculation method to estimate the efficiency
of lightning interception and to evaluate the risk of damage. It was described in the
book ‘Computation of Lightning Protection’ by the author published by Research
Studies Press in 1991. Nevertheless, with high efficiency, we can protect the
human being and his property against damage caused by lightning. Our knowledge
on the processes of lightning strokes helps to understand the operation of lightning
air terminal systems. The practical application of some theoretical conclusions is
illustrated with the Hungarian Standard for Lightning Protection of Structures.
However, the program does not intend to replace a handbook, referring the
standard aims only to show the practical application. The protection of low voltage
equipment and electronic equipment against over-voltage due to lightning is an
actual problem of lightning protection. This topic is dealt with on the basis of the
recent international recommendations. The operation of surge protection devices
can be demonstratively followed on the screen. The measurement methods and the
lightning localisation systems have made great developments in the last 10 years.
These are also demonstrated on screen. The author has participated over 20 times
in the International Conference on Lightning Protection, since 1963, which
compiles current information about lightning.
Study lightning from your computer at home! Enjoy and use this program with
good success!
Tibor Horváth
Professor Emeritus
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Iranians turned their efforts from rescue to relief Sunday after twin earthquakes that killed more than 300 people, trying to provide medical care for more than 2,000 injured and shelter and aid for thousands left homeless.
For a second night in a row, survivors of Saturday's magnitude 6.4 and 6.3 quakes in a northwestern province were advised to sleep outside for fear of continuing tremors. Bulldozers were already at work starting to clear up the rubble left from several destroyed villages.
The quakes hit in a sparsely populated region, but entire villages were sent crumbling to the ground. Many others were partially damaged.
The mayor of Varzaqan, one of the hardest-hit towns, said 12 villages in the region had been destroyed. Each of those villages had up to 1,000 residents and as many as a third of those people may have been killed, he told the news service.
Many of the dead were women and children killed under the rubble of falling homes as the quakes struck 11 minutes apart in late afternoon, a time when most men were still outdoors working in this agricultural region.
"Due to the traditional architecture of the villages, using clay bricks mixed with straw, rural areas have sustained most of the damage," said Reza Sedighi, Ahar's governor and head of the disaster relief center. He estimated that 25% of the public places, administrative buildings and houses were damaged.
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