Download or read book Prestress Loss and Creep Camber in a Highway Bridge with Reinforced Concrete Slab on Pretensioned Prestressed Concrete Beams written by Howard L. Furr and published by . This book was released on 1968 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prestress Loss and Creep Chamber in a Highway Bridge with Reinforced Concrete Slab on Pretensioned Prestressed Concrete Beams written by Howard L. Furr and published by . This book was released on 1968 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Loss of Prestress and Camber of Non composite and Composite Prestressed Concrete Structures written by Dan E. Branson and published by . This book was released on 1970 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Cooperative Highway Research Program Report written by and published by . This book was released on 1964 with total page 998 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prestress Losses in Pretensioned High strength Concrete Bridge Girders written by Maher K. Tadros and published by Transportation Research Board. This book was released on 2003 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: "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.

Download or read book Design of Precast Prestressed Bridge Girders Made Continuous written by R. G. Oesterle and published by Transportation Research Board National Research. This book was released on 1989 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents and presents results of a study to determine time-dependent behavior and relevant design criteria for simple-span precast, prestressed bridge girders made continuous. A questionnaire was used to determine current practice. Creep and shrinkage tests of steam-cured concrete loaded at an early age were made. Computer simulations were used to investigate the effects of time-dependent material behavior and variation in design parameters on the effective continuity for live load plus impact. The findings suggest that positive moment connections in the diaphragms at the piers are not required and provide no structural advantages. The findings also suggest that effective continuity for live load plus impact can vary from 0 to 100% dependent on the design parameters and timing of construction. Computer analyses were also used to determine an upper limit for the amount of negative moment reinforcement over the supports to insure full moment redistribution and attainment of maximum bridge strength. New computer programs were developed for simplified analysis to determine time-dependent effects and service moments. Recommendations for design procedures were presented and design examples given.

Download or read book Public Roads written by and published by . This book was released on 1970 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Highway Research in Progress written by and published by . This book was released on 1971 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prestressed Concrete Structures Creep Shrinkage Deflection Studies 1961 written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1962 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prestressed Concrete Technology written by United States. National Technical Information Service and published by . This book was released on 1976 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of the American Concrete Institute written by American Concrete Institute and published by . This book was released on 1974 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Texas Highways written by and published by . This book was released on 1969 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by and published by . This book was released on 1990 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Torsional Strength of Prestressed Concrete Bridge Girders written by Eugene Buth and published by . This book was released on 1971 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Highway Research Abstracts written by and published by . This book was released on 1969 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1981 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Predicting Camber Deflection and Prestress Losses in Prestressed Concrete Members written by S. H. Rizkalla and published by . This book was released on 2011 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate predictions of camber and prestress losses for prestressed concrete bridge girders are essential to minimizing the frequency and cost of construction problems. The time-dependent nature of prestress losses, variable concrete properties, and problems related to production variables make it difficult to predict camber accurately. The recent problems experienced by NCDOT during construction are mainly related to inaccurate prediction of camber. In this report, several factors related to girder production are shown to have a significant impact on the prediction of camber. A detailed method and an approximate method for predicting camber that both utilize adjustments to account for the production factors are proposed. The detailed method uses time-dependent losses calculations and creep factors to predict camber, while the approximate method uses multipliers. The current NCDOT method and the proposed methods are analyzed and compared using an extensive database of field measurements. The proposed methods are shown to provide significant improvements to the camber predictions in comparison to the current NCDOT method. Recommendations for design and production practices are provided.