Improvement Of Continuity Connection Over Fixed Piers

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Improvement of Continuity Connection Over Fixed Piers

M. Ala Saadeghvaziri
Improvement of Continuity Connection Over Fixed Piers Book PDF

Author : M. Ala Saadeghvaziri
Publisher : Unknown
Page : 150 pages
File Size : 40,8 Mb
Release : 2004
Category : Concrete bridges
ISBN : UCBK:C101302879

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Improvement of Continuity Connection Over Fixed Piers by M. Ala Saadeghvaziri Pdf

To improve structural efficiency of multi-span simply supported bridges, partial and/or full continuity is provided through cast- in-place concrete diaphragms and decks. These bridges, known as Simple-Span Precast Prestressed Bridge Girders Made Continuous, are continuous for live loads. This continuity connection is also beneficial from maintenance point of view by eliminating open joints. However, continuity connections also have their own structural, construction, and maintenance shortcomings. Development of positive moments and diaphragm cracking at the internal pier due to time dependent effects of prestressing is a major structural problem that also affects bridge durability and esthetics. Another issue is that due to reinforcement congestion joint construction is time consuming and thus expensive. Furthermore, the degree of continuity varies depending on structural and construction conditions. These problems are common to various design details used by many states in the US.

Post-tensioning the Inverted-t Bridge System for Improved Durability and Increased Span-to-depth Ratio

Rim Nayal
Post tensioning the Inverted t Bridge System for Improved Durability and Increased Span to depth Ratio Book PDF

Author : Rim Nayal
Publisher : Unknown
Page : 272 pages
File Size : 42,8 Mb
Release : 2007
Category : Bridges
ISBN : NWU:35556034506154

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Post-tensioning the Inverted-t Bridge System for Improved Durability and Increased Span-to-depth Ratio by Rim Nayal Pdf

Possibly the most pressing need in highway construction today is the repair or replacement of existing bridges. Due to increased needs and growing traffic, in addition to aging and extensive use, more than 2000 bridges in Kansas alone need to be replaced during the next decade. The majority of these bridges has spans of 100 ft or less, and has relatively shallow profiles. It is becoming increasingly important to implement a standard method for replacement in which the process is expedited and accomplished in cost-effective manner. Requirements for design and construction of concrete bridges have drastically changed during recent years. A main change in design is live-load requirements. Nebraska inverted-T bridge system has gained increasing popularity for its lower weight compared to I-girder bridges. However, there are some limiting issues when using IT system in replacing existing CIP bridges. Implementation of a post-tensioned IT system, which is the focus of this research, is believed to be one excellent solution for the IT deficiencies. Post-tensioning is added by placing a draped, post-tensioning duct in the stems of the IT members. Post-tensioning will lead to a higher span-to-depth ratio than IT system, and will reduce the potential transverse cracks in the (CIP) deck. Finally, the undesired cambers of pretensioned beams will be reduced, because fewer initial prestressing will be needed. This study was intended to explore the behavior of the PT-IT system, identify major parameters that control and limit the design of this system, and investigate different construction scenarios. This was achieved by conducting an extensive parametric study. For that purpose, PT-IT analysis program was developed and written using C++ programming language. The program was used to analyze various post-tensioning procedures for the post-tensioned inverted-T system. A Visual Basic friendly interface was provided to simplify the data input process. The findings of this research included recommendation of construction scenario for PT-IT system, as well as examining different methods for estimating time-dependent restraining moments. Effect of different concrete strengths on the behavior of PT-IT system was also determined. Most importantly, the effect of timing on different construction stages was also evaluated and determined.

Mobile Barrages and Intakes on Sediment Transporting Rivers

M. Bouvard
Mobile Barrages and Intakes on Sediment Transporting Rivers Book PDF

Author : M. Bouvard
Publisher : Routledge
Page : 320 pages
File Size : 43,5 Mb
Release : 2017-10-05
Category : Technology & Engineering
ISBN : 9781351431156

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Mobile Barrages and Intakes on Sediment Transporting Rivers by M. Bouvard Pdf

Rapid growth in water requirements makes it necessary to increase the amount of water drawn from rivers. The dams necessary for capturing river water have to be built to resist damage when large floods occur, and an idea of the possible destructive power of floods is given by the front photograph. The need for protection results in thick sill structures fitted with gates, and ""upstream"" and ""downstream"" cut-off walls. Sediment transported by rivers settles forming deposits behind dams, where flow velocities decrease. On the other hand, where flow velocities are high through hydraulic machinery (pums and turbines) fed from the dam, it can be necessary to remove even fine sand from the water, and also to remove floating debris. Various hydro-mechanical installations (including gates and screens) are introduced into the flow circuits to deal with sediment and debris problems.Many emperical solutions to definition of very important details complement standard design procedures. Understanding of their use is facilitated by numerous illustrations.

Life-Cycle Civil Engineering

Fabio Biondini,Dan Frangopol
Life Cycle Civil Engineering Book PDF

Author : Fabio Biondini,Dan Frangopol
Publisher : CRC Press
Page : 996 pages
File Size : 46,5 Mb
Release : 2008-05-28
Category : Technology & Engineering
ISBN : 9780203885307

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Life-Cycle Civil Engineering by Fabio Biondini,Dan Frangopol Pdf

Life-Cycle Civil Engineering contains the papers presented at the First International Symposium on Life-Cycle Civil Engineering (IALCCE 08), held in Villa Monastero, Varenna, Lake Como, Italy, 10-14 June, 2008. It consists of a book and a CD-ROM containing 150 papers, including eight keynote papers and 142 technical contributions from 28 countries.

Cathodic Corrosion Protection Systems

Alireza Bahadori
Cathodic Corrosion Protection Systems Book PDF

Author : Alireza Bahadori
Publisher : Gulf Professional Publishing
Page : 493 pages
File Size : 44,5 Mb
Release : 2014-07-05
Category : Technology & Engineering
ISBN : 9780128003794

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Cathodic Corrosion Protection Systems by Alireza Bahadori Pdf

Corrosion is a naturally occurring cost, worth billions in the oil and gas sector. New regulations, stiffer penalties for non-compliance and aging assets are all leading companies to develop new technology, procedures and bigger budgets catering to one prevailing method of prevention, cathodic protection. Cathodic Corrosion Protection Systems: A Guide for Oil and Gas Industries trains on all the necessary reports, inspection criteria, corrective measures and critical standards needed on various oil and gas equipment, structures, tanks, and pipelines. Demands in the cathodic protection market have driven development for better devices and methods, helping to prolong the equipment and pipeline’s life and integrity. Going beyond just looking for leaks, this handbook gives the engineer and manager all the necessary tools needed to put together a safe cathodic protection system, whether it is for buried casing while drilling, offshore structures or submarine pipelines. Understand how to install, inspect and engage the right cathodic protection systems for various oil and gas equipment, tanks, and pipelines Properly construct the right procedure and anodes with all relevant US and International standards that apply Gain knowledge concerning techniques, equipment, measurements and test methods used in real-world field scenarios

The Engineer

Anonim
The Engineer Book PDF

Author : Anonim
Publisher : Unknown
Page : 522 pages
File Size : 50,7 Mb
Release : 1857
Category : Engineering
ISBN : UOM:39015011411389

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The Engineer by Anonim Pdf

Engineering

Anonim
Engineering Book PDF

Author : Anonim
Publisher : Unknown
Page : 454 pages
File Size : 46,8 Mb
Release : 1866
Category : Engineering
ISBN : UIUC:30112062303455

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Engineering by Anonim Pdf

Handbook of Steel Connection Design and Details

Akbar R. Tamboli
Handbook of Steel Connection Design and Details Book PDF

Author : Akbar R. Tamboli
Publisher : McGraw Hill Professional
Page : 654 pages
File Size : 45,6 Mb
Release : 2010
Category : Technology & Engineering
ISBN : 9780071550055

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Handbook of Steel Connection Design and Details by Akbar R. Tamboli Pdf

Surveys the leading methods for connecting structural steel components, covering state-of-the-art techniques and materials, and includes new information on welding and connections. Hundreds of detailed examples, photographs, and illustrations are found throughout this handbook. --from publisher description.

Mechanics Magazine

John I Knight
Mechanics Magazine Book PDF

Author : John I Knight
Publisher : Unknown
Page : 430 pages
File Size : 42,8 Mb
Release : 1865
Category : Electronic
ISBN : ONB:+Z136964100

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Mechanics Magazine by John I Knight Pdf