An Investigation of Tendon Stress Limits for Prestressed Concrete Bridge Girders - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook An Investigation of Tendon Stress Limits for Prestressed Concrete Bridge Girders write by John J. Zendek. This book was released on 2008. An Investigation of Tendon Stress Limits for Prestressed Concrete Bridge Girders available in PDF, EPUB and Kindle.
Extending Span Ranges of Precast Prestressed Concrete Girders
Extending Span Ranges of Precast Prestressed Concrete Girders - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Extending Span Ranges of Precast Prestressed Concrete Girders write by Reid Wilson Castrodale. This book was released on 2004. Extending Span Ranges of Precast Prestressed Concrete Girders available in PDF, EPUB and Kindle. At head of title: National Cooperative Highway Research Program.
Collapse analysis of externally prestressed structures
Collapse analysis of externally prestressed structures - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Collapse analysis of externally prestressed structures write by Jens Tandler. This book was released on 2014-04-11. Collapse analysis of externally prestressed structures available in PDF, EPUB and Kindle. Inhaltsangabe:Introduction: This dissertation is an investigation into the behaviour of externally prestressed structures, focusing on bridge box girders, at the ultimate limit state. The main objective is the ductility and the tendon stress increase up to failure of externally prestressed structures. Their behaviour will be compared to internally prestressed structures. The dissertation may have valuable information for the first stages of the design process for medium span bridges as the study is concerned about the overall safety and efficiency of prestressed concrete bridges by the means of ductility. The aim is also to provide information about the tendon stress at failure, which is required for the detailed design. Inhaltsverzeichnis:Inhaltsverzeichnis: AcknowledgementsVIII NotationIX 1.Introduction1 1.1Definitions1 1.2Significance of this study3 1.3Scope of the project5 1.4Historical overview and typical characteristics of external prestressing6 1.5Further structural applications of external prestressing9 2.Behaviour of externally prestressed structures10 2.1Tendon layout considerations10 2.2Behaviour at serviceability stage12 2.3Fatigue problems14 2.4Behaviour at ultimate limit stage14 2.4.1Influence of tendon slip on the ultimate limit state18 2.4.2Influence of the arrangement of the deviators on the behaviour at ultimate limit state19 2.4.3Influence of simply support and continuous support on the ultimate limit state20 2.4.4Precast segmental and monolithic bridges21 3.Collapse analysis23 3.1Investigated bridge types and their differences23 3.2Original bridge data28 3.3Simplified bridge data as basis for the calculations30 3.4FE Calculation32 3.4.1Technical aspects33 3.4.2General approach34 3.4.3Geometric model39 3.4.4Element specifications40 3.4.5Constitutive models45 3.4.6Ordinary reinforcement59 3.4.7Prestress60 3.4.8Material and geometric non-linearity63 3.4.9Kinematic constraints66 3.4.10Discrete crack propagation analysis of the precast segmental type with gap elements68 3.4.11Summary of the dividing features of the different structure types for the FE analysis72 4.Results73 4.1Load deflection behaviour73 4.2Tendon stress increase up to failure76 4.3Other results78 5.Discussion of the results85 5.1Interpretation of the results85 5.2Discussion of the exactness of the FE calculations by comparing to the full scale test89 5.3Comparison to other FE calculations and test results93 6.Conclusion and [...]
Prestress Losses in Pretensioned High-strength Concrete Bridge Girders
Prestress Losses in Pretensioned High-strength Concrete Bridge Girders - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Prestress Losses in Pretensioned High-strength Concrete Bridge Girders write by Maher K. Tadros. This book was released on 2003. Prestress Losses in Pretensioned High-strength Concrete Bridge Girders available in PDF, EPUB and Kindle. "The HCM includes three printed volumes (Volumes 1-3) that can be purchased from the Transportation Research Board in print and electronic formats. Volume 4 is a free online resource that supports the rest of the manual. It includes: Supplemental chapters 25-38, providing additional details of the methodologies described in the Volume 1-3 chapters, example problems, and other resources; A technical reference library providing access to a significant portion of the research supporting HCM methods; Two applications guides demonstrating how the HCM can be applied to planning-level analysis and a variety of traffic operations applications; Interpretations, updates, and errata for the HCM (as they are developed);A discussion forum allowing HCM users to ask questions and collaborate on HCM-related matters; and Notifications of chapter updates, active discussions, and more via an optional e-mail notification feature."--Publisher.
Durability of Post-tensioning Tendons
Durability of Post-tensioning Tendons - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Durability of Post-tensioning Tendons write by fib Fédération internationale du béton. This book was released on 2001-01-01. Durability of Post-tensioning Tendons available in PDF, EPUB and Kindle. In some countries durability problems with post-tensioning tendons have in the past led to fairly restrictive regulations. Improvements to execution procedures have been developed since, and new or improved prestressing systems have been proposed, too. This development was, of course, subject of discussions in fib Commission 9 Reinforcing and Prestressing Materials and Sytems and in IABSE Working Commission 3 Concrete Structures. It was decided to organise a workshop with the aim to review the different aspects of the problems encountered and to discuss solutions available today. Keynote speakers from various countries were invited to contribute. Their papers are published in this bulletin, grouped together under the following themes: Inventory and condition (6 papers) Investigation and repair (5 papers) Technical progress (4 papers) Strategies for improvement (6 papers) Supported by the international federation for structural concrete fib, and the international association for bridge and structural engineering IABSE, the workshop took place on 15-16 November 2001 at Ghent University, celebrating the 75th anniversary of the Magnel Laboratory for Concrete Research, whose director also chaired the Scientific Committee and edited the bulletin. It needs to be emphasised that in the bulletin invited experts present their individual views. Although not yet discussed in any of the association's working bodies, the highly topical contents of the bulletin is believed to be of general interest to fib's members and to document a starting point for future work in this field. Therefore, the Council of fib agreed to exceptionally publish these papers within fib's series of Bulletins.
