Download or read book Tests of Simple span Skew I beam Bridges written by Nathan M. Newmark and published by . This book was released on 1948 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies of Slab and Beam Highway Bridges written by Nathan Mortimore Newmark and published by . This book was released on 1948 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies of Slab and Beam Highway Bridges Tests of simple span skew I beam bridges by N M Newmark C P Siess and W M Peckham written by Illinois. University. Engineering experiment station and published by . This book was released on 1946 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tests of Simple span Right I beam Bridges written by Nathan M. Newmark and published by . This book was released on 1946 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tests of Skew I beam Bridges written by Warren Monroe Peckham and published by . This book was released on 1941 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies of Slab and Beam Highway Bridges Tests of simple span right I beam bridges by N M Newmark C P Siess and R R Penman written by Illinois. University. Engineering experiment station and published by . This book was released on 1946 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies of Slab and Beam Highway Bridges Tests of simple span right I beam bridges written by University of Illinois at Urbana-Champaign. Engineering Experiment Station and published by . This book was released on 1946 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies of Slab and Beam Highway Bridges written by T. Y. Chen and published by . This book was released on 1957 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies of Slab and Beam Highway Bridges written by Nathan Mortimore Newmark and published by . This book was released on 1946 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theory and Design of Bridges written by Petros P. Xanthakos and published by John Wiley & Sons. This book was released on 1994 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indeed, this essential working reference for practicing civil engineers uniquely reflects today's gradual transition from allowable stress design to Load and Resistance Factor Design by presenting LRFD specifications - developed from research requested by AASH-TO and initiated by the NCHRP - which spell out new provisions in areas ranging from load models and load factors to bridge substructure elements and foundations.

Download or read book Destructive Testing and Ultimate Capacity of Skewed Simple span Bridges written by Andrew J. Bechtel and published by ProQuest. This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to advances in computing in the late 20 th century, it is now possible to create three-dimension nonlinear analytical models of structures. These models provide the capability of modeling the system as a whole and can lead to more accurate predictions of the system's ultimate capacity. Before these three-dimensional modeling techniques can become common place design tools, the accuracy of the models must be verified by comparing their modeling results to data from full-scale experiments in which structural systems are loaded to failure. To add to the engineering community's knowledge of the ultimate capacity of bridges, the University of Delaware and the Delaware River Bridge Authority have plans to perform destructive testing of a single span simply-supported skewed bridge (Bridge 7R). In preparations for the destructive test, three-dimensional non-linear finite element (FE) models were created to predict the ultimate capacity of the bridge (Ross, 2007). In order to evaluate the performance of existing FE models, a 1/5-scale model bridge was constructed and tested to its ultimate capacity. The results of the test showed that the assumption of a linear elastic concrete deck gave the FE model a greater stiffness and ultimate capacity. In order to predict the ultimate capacity, an advanced concrete model that allows for deterioration must be implemented. A unique aspect of Bridge 7R is that its supports are skewed in excess of 60 degrees. This provides a unique opportunity to observe how skew effects influence the ultimate capacity of the structure. To investigate the effects of skew on bridge performance, a parametric study using FE models was also performed. The results of the study showed that the ultimate capacity of a bridge increases as skew increases. Also, the reaction forces at the obtuse corners increase with increased skew. These phenomena occur due to the difference in stiffness across the width of the bridge at the supports.

Download or read book A Guide for the Field Testing of Bridges written by American Society of Civil Engineers. Committee on Safety of Bridges and published by . This book was released on 1980 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Reports written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1952 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Annual Meeting written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1954 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report for 1922 includes a summarized account of preliminary and organization meetings in 1919,1920 and 1921.

Download or read book Bulletin Series written by and published by . This book was released on 1947 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prototype Bridge Structures written by M. Y. H. Bangash and published by Thomas Telford. This book was released on 1999 with total page 1226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This definitive reference volume provides a comprehensive guide to the analysis and design of bridge structures worldwide. The in-depth consideration given to the major analytical, numerical and design issues associated with prototype structures will reduce the effort and expense involved in future construction. The book contains numerous analytical and design examples drawn from existing structures worldwide as well as an extensive bibliography and a large appendix which covers background analyses and computer subroutines.

Download or read book Strengthening of Existing Single Span Steel Beam and Concrete Deck Bridges written by K. F. Dunker and published by . This book was released on 1985 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unifying objective of Phases I and II of this study was to determine the feasibility of the post-tensioning strengthening method and to implement the technique on two composite bridges in Iowa. Following completion of these two phases, Phase III was undertaken and is documented in this report. The basic objectives of Phase III were further monitoring bridge behavior (both during and after post-tensioning) and developing a practical design methodology for designing the strengthening system under investigation. Specific objectives were: to develop strain and force transducers to facilitate the collection of field data; to investigate further the existence and effects of the end restraint on the post-tensioning process; to determine the amount of post-tensioning force loss that occurred during the time between the initial testing and the retesting of the existing bridges; to determine the significance of any temporary temperature-induced post-tensioning force change; and to develop a simplified design methodology that would incorporate various variables such as span length, angle-of-skew, beam spacing, and concrete strength. Experimental field results obtained during Phases II and III were compared to the theoretical results and to each other. Conclusions from this research are as follows: (1) Strengthening single-span composite bridges by post-tensioning is a viable, economical strengthening technique. (2) Behavior of both bridges was similar to the behavior observed from the bridges during field tests conducted under Phase II. (3) The strain transducers were very accurate at measuring mid-span strain. (4) The force transducers gave excellent results under laboratory conditions, but were found to be less effective when used in actual bridge tests. (5) Loss of post-tensioning force due to temperature effects in any particular steel beam post-tensioning tendon system were found to be small. (6) Loss of post-tensioning force over a two-year period was minimal. (7) Significant end restraint was measured in both bridges, caused primarily by reinforcing steel being continuous from the deck into the abutments. This end restraint reduced the effectiveness of the post-tensioning but also reduced midspan strains due to truck loadings. (8) The SAP IV finite element model is capable of accurately modeling the behavior of a post-tensioned bridge, if guardrails and end restraints are included in the model. (9) Post-tensioning distribution should be separated into distributions for the axial force and moment components of an eccentric post-tensioning force. (10) Skews of 45 deg or less have a minor influence on post-tensioning distribution. (11) For typical Iowa three-beam and four-beam composite bridges, simple regression-derived formulas for force and moment fractions can be used to estimate post-tensioning distribution at midspan. At other locations, a simple linear interpolation gives approximately correct results. (12) A simple analytical model can accurately estimate the flexural strength of an isolated post-tensioned composite beam.