Download or read book Development of a Computer Program for the Calculation of Time dependent Restraint Moments in Continuous Bridges Built with Precast Prestressed Concrete Girders written by Sami W. Dib and published by . This book was released on 1990 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Connection of Simple span Precast Concrete Girders for Continuity written by Richard A. Miller (Professional engineer) and published by Transportation Research Board. This book was released on 2004 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction and Research Approach -- Findings -- Interpretation, Appraisal, and Application -- Interpretation, Appraisal, and Application -- References -- Appendixes.
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 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 Fourth RILEM International Symposium on Creep and Shrinkage of Concrete Mathematical Modeling August 26 29 1986 written by and published by . This book was released on 1986 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improvement of Continuity Connection Over Fixed Piers written by M. Ala Saadeghvaziri and published by . This book was released on 2004 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book PCI Journal written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HRIS Abstracts written by and published by . This book was released on 1990 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computer Applications in Concrete Technology San Antonio 1987 written by Victor E. Saouma and published by . This book was released on 1988 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains the full length papers which were presented at the San Antonio ACI Convention in March 1987.
Download or read book McTrans Catalog written by and published by . This book was released on 1996 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Jointless Bridge Decks written by Paul Zia and published by . This book was released on 1995 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major focus of this research was to validate the concept of connecting two adjacent simple-span girders with a link slab to form a jointless bridge deck so as to eliminate the standard deck joint between the girders. Laboratory tests were conducted on two large-scale specimens to study the performance of the link slab and the girders. The test results indicated that the contribution of link slab to structural continuity is negligible since the stiffness of the link slab is much less than that of the beams with composite decks. Therefore the beams can be treated as simply supported structures without considering the link slab. Furthermore, the stresses in the link slab are controlled primarily by the predominant bending effect due to the end rotations of the beams rather than the axial load effect. A simplified method of analysis is proposed in which the end rotations of the two adjacent girders under a given loading are determined first. Then the end rotations are imposed on the ends of the link slab and the induced moment in the link slab is thus calculated. A design guideline for the link slab is also proposed and illustrated by a design example. The reinforcement for the link slab is designed to control the crack width in the link slab according to the AASHTO criterion.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geodex Structural Information Service written by Geodex International and published by . This book was released on 1976 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PCs in Transportation Software Directory written by and published by . This book was released on 1995 with total page 508 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 Applied Mechanics Reviews written by and published by . This book was released on 1997 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt:
