Ultimate Shear Capacity and Residual Prestress Force of Full-scale, Forty-one-year-old 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 Ultimate Shear Capacity and Residual Prestress Force of Full-scale, Forty-one-year-old Prestressed-concrete Girders write by Parry Osborn. This book was released on 2010. Ultimate Shear Capacity and Residual Prestress Force of Full-scale, Forty-one-year-old Prestressed-concrete Girders available in PDF, EPUB and Kindle. The ultimate shear capacity of prestressed concrete beams is difficult to predict accurately, especially after being in service for an extended period of time. The Utah Department of Transportation asked researchers at Utah State University to experimentally determine the existing shear capacity of 41-year-old prestressed, decommissioned concrete bridge girders and then provide recommendations on how to increase that ultimate shear capacity. This thesis presents the research findings that relate to the existing shear capacity of the prestressed concrete girders. Eight AASHTO Type II bridge girders were tested up to failure by applying external loads near the supports to determine their ultimate shear capacities. The measured results were then compared to calculated values obtained using the AASHTO LRFD bridge design code, and the ACI 318-08 design code. Prestress losses were also measured by means of a cracking test and then compared to values calculated according to the AASHTO prestress loss equations. Both the ultimate shear capacities and the residual prestress forces were used to evaluate the girders after being in service for more than 40 years.
Shear Capacity of in Service Prestressed Concrete Bridge Girders
Shear Capacity of in Service 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 Shear Capacity of in Service Prestressed Concrete Bridge Girders write by Paul Barr. This book was released on 2010. Shear Capacity of in Service Prestressed Concrete Bridge Girders available in PDF, EPUB and Kindle. The design procedure to calculate the shear capacity of bridge girders that was used forty years ago is very different than those procedures that are recommended in the current AASHTO LRFD Specifications. As a result, many bridge girders that were built forty years ago do not meet current design standards, and in some cases warrant replacement due to insufficient calculated shear capacity. However despite this insufficient calculated capacity, these bridge girders have been found to function adequately in service with minimal signs of distress. The objective of this research was to investigate the actual in service capacity of prestressed concrete girders that have been in service over an extended period of time.
Evaluation and Repair Procedures for Precast/prestressed Concrete Girders with Longitudinal Cracking in the Web
Evaluation and Repair Procedures for Precast/prestressed Concrete Girders with Longitudinal Cracking in the Web - 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 Evaluation and Repair Procedures for Precast/prestressed Concrete Girders with Longitudinal Cracking in the Web write by Maher K. Tadros. This book was released on 2010. Evaluation and Repair Procedures for Precast/prestressed Concrete Girders with Longitudinal Cracking in the Web available in PDF, EPUB and Kindle. This report establishes a user's manual for the acceptance, repair, or rejection of precast/prestressed concrete girders with longitudinal web cracking. The report also proposes revisions to the AASHTO LRFD Bridge Design Specifications and provides recommendations to develop improved crack control reinforcement details for use in new girders. The material in this report will be of immediate interest to bridge engineers.
Shear Strength and Shear Fatigue Behavior of Full-scale Prestressed Concrete Box Girders
Shear Strength and Shear Fatigue Behavior of Full-scale Prestressed Concrete 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 Shear Strength and Shear Fatigue Behavior of Full-scale Prestressed Concrete Box Girders write by Anita K. Buzick. This book was released on 1999. Shear Strength and Shear Fatigue Behavior of Full-scale Prestressed Concrete Box Girders available in PDF, EPUB and Kindle. Two full-scale prestressed concrete box girders with identical properties were tested. The loads were placed so that shear rather than flexure would govern failure. The first girder was tested to evaluate ultimate shear strength under monotonic loading. The second girder was subjected to one-half million cycles of repeated loading and nine static overloads before its ultimate strength test. The results indicated that the effect of repeated loading on the shear strength of a shear dominated girder is less significant than that of a flexure dominated girder.
Shear Capacity of High Strength Prestressed Concrete Girders
Shear Capacity of High Strength 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 Shear Capacity of High Strength Prestressed Concrete Girders write by David L. Hartmann. This book was released on 1988. Shear Capacity of High Strength Prestressed Concrete Girders available in PDF, EPUB and Kindle.
