Precast Segmental Double-T Girder Systems for Multi-span Highway Overpass Bridges - 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 Precast Segmental Double-T Girder Systems for Multi-span Highway Overpass Bridges write by Jeffrey Stuart Smith. This book was released on 2012. Precast Segmental Double-T Girder Systems for Multi-span Highway Overpass Bridges 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.
Precast Segmental Box Girders
Precast Segmental Box 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 Precast Segmental Box Girders write by Fadzli Mohamed Nazri. This book was released on 2019-02-09. Precast Segmental Box Girders available in PDF, EPUB and Kindle. This book explores the fundamentals of the elastic behaviour of erected precast segmental box girders (SBG) when subjected to static load, as well as the construction process (casting and erection work) involved. It analyzes and compares the experimental results with those obtained using the finite element method and theoretical calculations. A short-term deflection analysis for different loads is obtained by determining the maximum deflection, stress and strain value of single span precast SBG under a variety of transversal slope. The outcome of this work provides a better understanding of the behaviour of precast SBG in terms of structural responses as well as defects, so that maintenance work can then be focused on the critical section at mid span area specifically for the bridge project longitudinally and transversely. The book is of interest to industry professionals involved in conducting static load tests on bridges, and all researchers, designers, and engineers seeking to validate experimental work with numerical and analytical approaches.
Bridge System with Precast Concrete Double-T Girder and External Unbonded Post-tensioning
Bridge System with Precast Concrete Double-T Girder and External Unbonded Post-tensioning - 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 Bridge System with Precast Concrete Double-T Girder and External Unbonded Post-tensioning write by Yang Eileen Li. This book was released on 2010. Bridge System with Precast Concrete Double-T Girder and External Unbonded Post-tensioning available in PDF, EPUB and Kindle. This thesis compares the consumption of primary superstructure material in a conventional single span CPCI system with those of double-T alternatives. The CPCI system is currently the preferred bridge type for short and medium spans in Canada, despite its relatively inefficient use of materials due to imperfect live load sharing among multiple parallel girders. The double-T alternatives utilize slender double-T cross-sections, fully precast segments, and post-tensioning in both longitudinal and transverse direction. The economy of the CPCI and double-T systems is compared within the framework of four sample designs. The results indicate that the double-T systems are in general more efficient than the CPCI system and have the potential to achieve better economy.
Continuous Prestressed Concrete Girder Bridges
Continuous Prestressed Concrete Girder Bridges - 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 Continuous Prestressed Concrete Girder Bridges write by Mary Beth Deisz Hueste. This book was released on 2016. Continuous Prestressed Concrete Girder Bridges available in PDF, EPUB and Kindle. The Texas Department of Transportation designs typical highway bridge structures as simple span systems using standard precast, pretensioned girders. Spans are limited to about 150 ft due to weight and length restrictions on transporting the precast girder units from the prestressing plant to the bridge site. Such bridge construction, while economical from an initial cost point of view, may become somewhat limiting when longer spans are needed. This project focused on developing additional economical design alternatives for longer span bridges with main spans ranging from 150-300 ft, using continuous precast, prestressed concrete bridge structures with in-span splices. Phase 1 of this study focused on evaluating the current state-of-the-art and practice relevant to continuous precast concrete girder bridges and recommending suitable continuity connections for typical Texas bridge girders; the findings are documented in the Volume 1 project report. This report summarizes Phase 2 of the research including detailed design examples for shored and partially shored construction, results of a parametric design study, and results of an experimental program that tested a full-scale girder containing three splice connections. The parametric design study indicated that for bridges spanning from 150-300 ft, continuous precast, prestressed concrete girder bridges with in-span splices can provide an economical alternative to steel girder bridges and segmental concrete box girder construction. The tested splice connections performed well under service level loads. However, the lack of continuity of the pretensioning through the splice connection region had a significant impact on the behavior at higher loads approaching ultimate conditions. Improved connection behavior at ultimate conditions is expected through enhanced connection details. Recommendations for design of continuous spliced precast girders, along with several detailing suggestions are discussed in the report.
