Author: Dr. Ahmed Abdel-Atty Gab-Allah | Size: 7.72 MB | Format:PDF | Publisher: Zagazig University | Year: 2010 | pages: 63 | ISBN: unknown
INTRODUCTION
Bridges play an important role in linking different parts of highway networks, and therefore have a great impact on the capacities of such networks. Bridges are massive structures that require large amounts of materials, skilled labor, and heavy machinery for their construction. Therefore, the decision regarding the most convenient construction system should be based on careful evaluation of all applicable alternatives, and using evaluation criteria appropriate for each project.
The construction of bridges had started very long time ago. However, the bridge construction technologies have evolved in the 20th century, and were fueled by the Industrial Revolution. At the turn of the century, steel bridges were riveted together, not bolted; concrete bridges were cast in place, not precast; and large bridge members were built from lacing bars and smaller sections, not rolled in one piece. Construction techniques such as post-tensioning, slurry walls, soil freezing, and shield tunneling had not yet been conceived. Bridge construction is changing as the new millennium begins. New construction techniques and new materials are emerging. There are also new issues facing the bridge construction technologies relative to the research needs associated with the new techniques and materials introduced.
Over many decades, various construction systems for bridges have been developed and successfully used. Most of these systems, with advances and modifications, are still in use until today. The objective of this material is to review the state of the art in the area of bridge construction. This involves the latest construction systems and future trends for this type of structures.
For each construction system, a brief description is outlined that includes: system concept, main system components, construction sequence, system advantages, and system disadvantages and limitations. In addition, the bridge construction in Egypt is discussed in view of the applicability of various construction systems under the Egyptian construction environment. This includes the potential of using the promising systems yet to be applied in Egypt.
Bridges can be classified according to their purpose into highway bridges, elevated roads, railway bridges, and foot bridges. This material is limited to highway bridges and elevated roads since their work volume constitutes more than 90% of the total volume of bridge works in Egypt. Only the construction systems for bridge superstructures are included.
Further, bridges can be classified according to their material of construction into timber, masonry, steel, reinforced concrete, and prestressed concrete. The material is limited to prestressed concrete bridges since most recent developments in the bridge construction systems are found in this category.
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Posted by: David90 - 06-06-2011, 07:57 AM - Forum: Archive
- No Replies
Title:
Asian Concrete Model Code 2006 Level 1 and 2 Documents
+
Asian Concrete Model Code 2006 Level 3 Documents - Design for Seismic Actions
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Asian Concrete Model Code 2006 Level 3 Documents - Seismic Assessment and Retrofit
Author & Publisher:
International Committee on Concrete Model Code ( for Asia )
If you have problem with downloading from file sharing server because you don't have premium account, bore with waiting time and hate with free link which couldn't resume, don't worry, I have many trick to solve this problem.
I introduce you with cbox (chatting box)
If you have using rapidleech, cbox similar with this.
cbox works by create a mirror link from file sharing server like rapidshare, then you can download from it's (cbox) server.
Code:
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Open the above link and you will look like this
First, you must register (it no need email verified), just put your name at the top box and the hit profile button at the right side. Fill your password and now you are registered member
Now you are ready to download.
First, prepare you download links (cbox supports many sites, you could see on it's site)
Second, check your link with link checker which available on it's site
Third, post your link (copy and paste link which just checked with link checker) in the second box under your name
Last, wait for Moderator to leech your link then you can download without free account
NB:
This link expired after 3-4 hours (I think it's enough time to download big file), but if you haven't finished your link, you can releech your file, copy the fresh download link and then replace your old links in your Download manager (I'm using IDM). Then resume it.
Now I would like to purchase the premium right to download the file from the online file sharing. I tries mydownloader.net for 3 days, I found many problem with them, 1/3 of download files need to proceed many times, as those files need to transfer to their server before we could resumable download to our PC.
It took long time to transfer the download files to their sever, before we could download, and 30% link are unable to load to their sever.
If purchase fileserve, some of our link in the forum does not include fileserve.
Please suggest the best file sharing server for me!
Modification of the ACI Rectangular Stress Block for High-Strength Concrete
Author: Hishmam H. H. Ibrahim and J. G. MacGregor | Size: 5544 KB | Format:PDF | Publisher: ACI | Year: 1997 | pages: 9 | ISBN: -
Most concrete codes do not explicitly cover concrete with strengths above 50-60 MPa (7000 to 9000psi) . Compression stress blocks from three current codes that do allow design for high strength concrete (HSC) sections are presented.
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A thorough understanding of the interaction of waves and currents with offshore structures has now become a vital factor in the safe and economical design of various offshore technologies. There has been a significant increase in the research efforts to meet this need. Although considerable progress has been made in the offshore industry and in the understanding of the interaction of waves, currents, and wind with ocean structures, most of the available books concentrate only on practical applications without a grounding in the physics. This text integrates an understanding of the physics of ocean–structure interactions with numerous applications. This more complete understanding will allow the engineer and designer to solve problems heretofore not encountered, and to design new and innovative structures. The intent of this book is to serve the needs of future generations of engineers designing more sophisticated structures at ever increasing depths.
Table of Contents
1. Introduction
2. Review of the fundamental equations and concepts
3. Separation and time-dependent flows
4. Wave and wave-structure interactions
5. Wave forces on large bodies
6. Vortex induced vibrations
7. Hydrodynamic damping.
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_________________________________________________________________________________________________________
Moderator´s Note:
The Links have been fixed. Thanks to s0p9015 for the review and notification.
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Dear All,
I am an offshore structural engineer and currently looking for a book in the leterature. This book is a part of knovel collection that some university can have a full access. The title is as follows:
Title: Wave Forces on Offshore Structures
Author: Sarpkaya, Turgut "Sarp"
ISBN:978-0-521-89625-2
Electronic ISBN: 978-0-511-76502-5
Publisher:Cambridge University Press
Page:331
URL in Knovel:
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Geospatial Analysis and Modelling of Urban Structure and Dynamics (GeoJournal Library)
Author: Bin Jiang and Xiaobai Yao (Editors) | Size: 9.4 MB | Format:PDF | Publisher: Springer | Year: 2010 | pages: 440 | ISBN: ISBN10: 9048185718 & ISBN13: 9789048185719
Book Description:
The increasingly urbanized world has created various problems of environment, climate, consumption of resources, and public health, which are closely linked to the side-effects of urbanization such as sprawl, congestion, housing affordability and loss of open space. Fundamental to the urban problems are two separate yet related issues: urban structure and urban dynamics. The chapters collected in this book present an excellent profile of the current state of geospatial analysis and modelling, and demonstrate how these approaches can contribute to the study of various urban issues. The book addresses key themes including new ways of capturing data digitally at the individual level, the development of systems based around networks, the notion of linking hierarchy to networks to morphology as in complexity theory, and the development of new ways of integrating diverse urban processes through simulation paying careful attention to the basic econometric and statistical principles of spatial analysis.
With a foreword by Michael Batty and an epilog by Michael F. Goodchild.
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Terrain analysis has been an active study field for years and attracted research studies from geographers, surveyors, engineers and computer scientists. With the rapid growth of Geographical Information System (GIS) technology, particularly the establishment of high resolution Digital Elevation Models (DEM) at national level, the challenge is now focused on delivering justifiable socio-economical and environmental benefits. The contributions in this book represent the state of the art of terrain analysis methods and techniques in areas of digital representation, morphological and hydrological models, uncertainty and applications of terrain analysis.
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