QUANTITATIVE RISK ASSESSMENT : APPLICATION, MYTHS AND FUTURE DIRECTION
The development of quantitative risk assessment (QRA) methodologies has advanced to such a state that it is now a practical risk management tool in geotechnical engineering. Pilot applications of QRA have shown great promise and it has contributed to addressing questions that would otherwise be very difficult to answer using conventional techniques. Resistance against the more widespread use of QRA is real and this is partly due to myths about the technique. The essence is risk-based thinking, be it under a quantitative or qualitative framework. The geotechnical community stands to gain by integrating risk-based thinking and methodologies into current geotechnical practice. This integration will better align the geotechnical profession with many of
the other engineering fields that practise risk management in a more explicit manner.
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Posted by: Sumatra - 09-27-2010, 02:21 PM - Forum: Archive
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[Book Request] Continental intraplate earthquakes: science, hazard, and policy issues
This is a good book that explained about continental intraplate earthquake edited by Prof. Seth Stein and published by Geological Society of America. It contains pros and cons in seismic hazard analysis for continental interiors and describes the relevance of active faulting and seismicity studies to assessment of longterm. It also discuses the seismic hazard in Australia, Antarctica, New Madrid Zone, etc.
GROUND IMPROVEMENT ENGINEERING-ISSUES AND SELECTION
The issues, which affect the successful application of ground improvement in soil and rock, are studied with emphasis on the design, construction and long-term performance of the improved ground. Discussed are over thirty technical issues affecting twenty four ground improvement techniques representing the eight main categories of ground improvement in soil: densification, consolidation, weight reduction, reinforcement, chemical treatment, thermal stabilization, electrotreatment and biotechnical stabilization. Theissues, which influence rock integrity, are also discussed, including those related to rock properties as well as external factors such as water, climate, earthquakes and others. Eight types of rock degradation are
described in the paper and possible remediation measures are identified for each, many of which include the application of ground improvement. Several factors, which may influence the selection of a ground improvement technique or a combination of techniques, are discussed and a case study is presented to demonstrate the selection process.
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The Art of Precast Concrete: Colour, Texture, Expression
Author(s): D.F.H. Bennett
Publisher: Birkhauser Verlag AG
Date : 2005
Pages : 160
Format : pdf
Language : English
ISBN-10 : 3764371501
As a building material, precast concrete allows a wide range of sculptural forms and design options. By treating the surface in various ways, fascinating textures and fine finishes can be produced. This book provides a systematic overview of the variety of applications for such concrete elements throughout Europe. Author David Bennett provides in-depth information on newly developed, especially lightweight forms of concrete such as GRC (Glass-Fibre Reinforced Concrete), Ductal and CRC (Compact Reinforced Composite). A selection of some 24 projects which are of particular significance, are documented in detail and provide a wealth of inspiring design ideas. The appendix comprises an overview of the building practices in the individual European countries and the availability of concrete elements. Amongst the buildings documented are the Scottish Parliament Building in Edinburgh by Enric Miralles Benedetta Tagliabue, the Synagogue in Dresden by Wandel, Hoefer, Lorch + Hirsch, and the Mexican Embassy in Berlin.
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Posted by: wahyoe - 09-27-2010, 10:19 AM - Forum: Archive
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MATLAB Advanced GUI Development (request)
Hai...
pliss upload
MATLAB®Advanced GUI Development
aurthorScott T. Smith
ISBN: 1-59858-181-3
After more than 20 years of development, MATLAB has evolved from a powerful matrix calculation application into a universal programming tool used extensively within scientific and engineering communities both commercial and academic.
With more than 10 years experience in the field electrical engineering and developing MATLAB applications, Smith provides readers with an in-depth background on how to develop graphical user interfaces using MATLAB Handle Graphics. Smith cites the advantages that GUI applications offer to users who wish to solve complex problems by providing interactivity and visual feedback.
Chapters cover such topics as using GUI applications for animation of 2D or 3D graphical data, Handle Graphics® programming and low-level GUIs, high-level GUI development using GUIDE, and advanced GUI architectures including multiple figure GUIs and image mapped interface controls. Instructional examples and exercises are provided throughout each chapter, offering a hands-on approach to learning MATLAB GUI development.
Book Title: Twort's Water Supply, Sixth Edition
Author: Don D. Ratnayaka, Malcolm J. Brandt, Michael Johnson
ISBN: 0750668431
Publisher: Butterworth-Heinemann, 2009-02-10
File: 54.11 MB PDF, 704 pages
Description:
Water Supply has been the most comprehensive guide to the design, construction and operation of water supply systems for more than 40 years. The combined experience of its authors make it an unparalleled resource for professionals and students alike.
This new sixth edition has been fully updated to reflect the latest WHO, European, UK and US standards, including the European Water Framework Directive. The structure of the book has been changed to give increased emphasis to environmental aspects of water supply, in particular the critical issue of wastage reduction and conservation of supplies.
Written for both the professionals and students, this book is essential reading for anyone working in water engineering.
.Comprehensive coverage of all aspects of public water supply and treatment
.Details of US, European and WHO standards and practice
.Based on decades of practical professional experience
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Grouting of Bridge Post-Tensioning Tendons Training Manual
Grouting of Bridge Post-Tensioning Tendons Training Manual
Produced by the State of Florida Department of Transportation
State Construction Office - Tallahassee, Florida,
In Cooperation with the Federal Highway Administration
July 2002 edition
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Posted by: yanburak - 09-27-2010, 07:05 AM - Forum: Archive
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I've been searching these papers.
Could someone help me and give me a download link?
1. Space Trusses with Brittle-Type Strut Buckling
Journal of the Structural Division, Vol. 102, No. 7, July 1976, pp. 1479-1492
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2. Ultimate Load Testing of Space Trusses
Journal of the Structural Division, Vol. 108, No. 6, June 1982, pp. 1324-1335
More details shown in the URL:
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I wonder why there is an option of inserting hyperlink in creating thread or reply if it is being regulated. I was given warning by using this option instead of using transparent link.
I suggest to delete this option so that others will not be confused in using this alternative to provide link information.
NONLINEAR FINITE ELEMENT MODELING AND CHARACTERIZATION OF GUYED TOWERS UNDER SEVERE LOADING
Guyed towers have been widely employed in the telecommunication industry. However, in current building codes, there is still no comprehensive specification for their nonlinear response under severe loads, which includes large static loads, seismic loads and impulsive loads. This study thus intends to improve the understanding and analysis of guyed towers that undergo not only large deformation, but also large strain. Impulsive loads are potential threat to the safety of guyed towers besides wind load, earthquake, and ice storm. No methodology or related research has been conducted in this area so far. This research explores the area using an already developed P-I diagram method and nonlinear finite element modeling to provide an efficient and effective way for structural integrity evaluation for guyed towers.
The mechanical characteristics of basic components of guyed towers are investigated first. Geometric nonlinearity is of the main concern for the impact of large deflection. The modified Riks scheme has been applied in nonlinear static analysis and the Newmark beta method for dynamic analysis. To investigate the efficiency and effectiveness of linear analysis methods, several corresponding examples are studied. It is found that linear static analysis works only when the deformation is small. The equivalent inertia force method and the large additional stiffness method for guyed towers under seismic loads are compared and validated. Their results are very similar.
Because guyed towers with large defection also have large strain in some parts, material nonlinearity is introduced by improving the existing FEM codes for trusses and cables. Isotropic hardening is employed in nonlinear static analysis. Dynamic hardening is used in dynamic analysis. Some specific examples have been conducted to verify the improvements. It is found that the improved methodology can well predict the performance of structures and tremendous difference exists between elastic analysis and inelastic analysis. Under seismic loading condition, inelasticity in material can help dissipate the inputted seismic energy and reduce the intensity of structural response.
The combined application of nonlinear finite elements and algorithm enables the nonlinear analysis for guyed towers. A 50 ft guyed tower with taut cables and a 100 m guyed tower with sagged cables were studied for their response under large static loads and seismic loads. The nonlinear static and dynamic response was accurately traced. It is found that equivalent static analysis works well when deflection is small. In sagged guyed tower, the structure is relatively soft at the beginning of static loading. With the increase of deflection, the structure is gradually stiffened. The consideration of inelasticity greatly improves the accuracy of analysis.
To evaluate the guyed tower’s safety under impulsive loads, relative P-I formulas have been derived based on existing transverse velocity profiles of rigid plastic beams under impulsive loads. Two failure modes (shear failure and bending failure) were differentiated. The impact of boundary condition and load types on the response is investigated. It is found under certain conditions only one failure mode is possible. But shear failure and bending failure can coexist under very severe impulsive loads. One specific example has been used to demonstrate the combined application of the P-I diagram method and FEM. Most guyed towers are expected to survive light or medium impulsive loads due to their high redundancy and small loading area.
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