Download or read book Seismic Retrofitting of Rectangular Bridge Column for Shear written by David I. McLean and published by . This book was released on 1992 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seismic Retrofitting of Rectangular Bridge Columns for Shear written by David I. McLean and published by . This book was released on 1992 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seismic Retrofitting of Rectangular Reinforced Concrete Bridge Columns for Shear written by Laura Lynn Bernards and published by . This book was released on 1991 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seismic Assessment and Retrofit of Bridge Footings written by Yan Xiao and published by . This book was released on 1994 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seismic Retrofit and Repair of Existing Reinforced Concrete Bridge Columns by Transverse Prestressing written by Majid Sadoughi Yarandi and published by . This book was released on 2007 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Diagnostics and Retrofit of Rectangular Bridge Columns for Seismic Loads written by Zunling Sun and published by . This book was released on 1993 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Diagnostics and Retrofit of Flexural Rectangular Bridge Columns for Seismic Loads written by Zunling Sun and published by . This book was released on 1993 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seismic Design and Retrofit of Bridges written by M. J. N. Priestley and published by John Wiley & Sons. This book was released on 1996-04-12 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of their structural simplicity, bridges tend to beparticularly vulnerable to damage and even collapse when subjectedto earthquakes or other forms of seismic activity. Recentearthquakes, such as the ones in Kobe, Japan, and Oakland,California, have led to a heightened awareness of seismic risk andhave revolutionized bridge design and retrofit philosophies. In Seismic Design and Retrofit of Bridges, three of the world's topauthorities on the subject have collaborated to produce the mostexhaustive reference on seismic bridge design currently available.Following a detailed examination of the seismic effects of actualearthquakes on local area bridges, the authors demonstrate designstrategies that will make these and similar structures optimallyresistant to the damaging effects of future seismicdisturbances. Relying heavily on worldwide research associated with recentquakes, Seismic Design and Retrofit of Bridges begins with anin-depth treatment of seismic design philosophy as it applies tobridges. The authors then describe the various geotechnicalconsiderations specific to bridge design, such as soil-structureinteraction and traveling wave effects. Subsequent chapters coverconceptual and actual design of various bridge superstructures, andmodeling and analysis of these structures. As the basis for their design strategies, the authors' focus is onthe widely accepted capacity design approach, in which particularlyvulnerable locations of potentially inelastic flexural deformationare identified and strengthened to accommodate a greater degree ofstress. The text illustrates how accurate application of thecapacity design philosophy to the design of new bridges results instructures that can be expected to survive most earthquakes withonly minor, repairable damage. Because the majority of today's bridges were built before thecapacity design approach was understood, the authors also devoteseveral chapters to the seismic assessment of existing bridges,with the aim of designing and implementing retrofit measures toprotect them against the damaging effects of future earthquakes.These retrofitting techniques, though not considered appropriate inthe design of new bridges, are given considerable emphasis, sincethey currently offer the best solution for the preservation ofthese vital and often historically valued thoroughfares. Practical and applications-oriented, Seismic Design and Retrofit ofBridges is enhanced with over 300 photos and line drawings toillustrate key concepts and detailed design procedures. As the onlytext currently available on the vital topic of seismic bridgedesign, it provides an indispensable reference for civil,structural, and geotechnical engineers, as well as students inrelated engineering courses. A state-of-the-art text on earthquake-proof design and retrofit ofbridges Seismic Design and Retrofit of Bridges fills the urgent need for acomprehensive and up-to-date text on seismic-ally resistant bridgedesign. The authors, all recognized leaders in the field,systematically cover all aspects of bridge design related toseismic resistance for both new and existing bridges. * A complete overview of current design philosophy for bridges,with related seismic and geotechnical considerations * Coverage of conceptual design constraints and their relationshipto current design alternatives * Modeling and analysis of bridge structures * An exhaustive look at common building materials and theirresponse to seismic activity * A hands-on approach to the capacity design process * Use of isolation and dissipation devices in bridge design * Important coverage of seismic assessment and retrofit design ofexisting bridges

Download or read book Seismic Shear Strength of Reinforced Concrete Columns written by M. J. N. Priestley and published by . This book was released on 1993 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design Guidelines for Assessment Retrofit and Repair of Bridges for Seismic Performance written by M. J. N Priestley and published by . This book was released on 1992 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of Seismic Response and Steel Jacket Retrofit of Squat Circular Reinforced Concrete Bridge Columns written by Ravindra Verma and published by . This book was released on 1993 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Steel Jacket Retrofit for Enhancing Shear Strength of Short Rectangular Reinforced Concrete Columns written by Yan Xiao and published by . This book was released on 1993 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seismic Retrofit of Circular Reinforced Concrete Bridge Columns written by and published by . This book was released on 1990 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inadequate flexural strength and ductility or shear strength of concrete bridge columns has resulted in collapse or severe damage of a number of California bridges in recent moderate earthquakes. In general, these bridges were designed prior to the new seismic design methods which were implemented in the mid-seventies. Bridges constructed in accordance with the new design methods have performed well in recent earthquakes. However, the large number of older bridges that are in service, particularly freeway overpasses designed and constructed in the 1950s and 1970s, are now recognized to have substandard design details and to constitute a cause for major concern. This paper reports the results of a theoretical and experimental program investigating retrofit techniques for circular columns by encasing the critical regions within a steel jacket. The jacket is bonded to the column using grout. Results from six large-scale column tests show that the casing acts efficiently as confinement reinforcement, enabling a displacement ductility factor of greater than 6 to be achieved. The casing also inhibits bond failures at the laps of longitudinal reinforcement in the critical regions of the column by restraining the dilation and spalling of the cover concrete which degenerates into bond failure. Comparisons of 'as-built' and retrofitted columns are presented, and experimental strengths and ductilities are compared with analytical predictions. For the covering abstract of the Conference see IRRD Abstract no. 807839.

Download or read book Seismic Retrofit of Rectangular Bridge Columns Using CFRP Wrapping written by Mesay Abebaw Endeshaw and published by . This book was released on 2008 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seismic Assessment and Retrofit of Reinforced Concrete Columns written by Konstantinos G. Megalooikonomou and published by Cambridge Scholars Publishing. This book was released on 2019-02-27 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete columns play a very important role in structural performance. As such, it is essential to apply a suitable analytical tool to estimate their structural behaviour considering all failure mechanisms such as axial, shear, and flexural failures. This book highlights the development of a fiber beam-column element accounting for shear effects and the effect of tension stiffening through reinforcement-to-concrete bond, along with the employment of suitable constitutive material laws.

Download or read book Seismic Retrofitting of Concrete Bridge Columns by External Prestressing written by Derek Mes and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to recent earthquakes and the ensuing damage, there has been some concern regarding the adequacy of older structures. In particular, there is apprehension as to the adequacy of bridges that were erected prior to the early 1970's. Before this time there was little or no design process which considered seismic behaviour of bridges. Recent codes have been adjusted to compensate for these earlier problems. However, it is not feasible to remove and rebuild all of the previously built bridges. Hence, the only remaining viable approach to improving seismic adequacy of existing bridges is seismic upgrading or retrofitting these structures to improve their strength and/or deformability. The research program presented in this thesis addresses the problem of reinforced concrete bridge column retrofitting. More specifically, the applicability of a new retrofitting technique, developed at the University of Ottawa for columns of different aspect ratios and reinforcement arrangements, will be verified in terms of concrete confinement and shear resistance. The retrofitting technique consists of wrapping and prestressing high strength steel 7-wire strands around the test columns in order to increase their ductility. The specimen's tested were based on pre-1971 design, and hence had larger transverse reinforcement spacing than the present practice. This results in a lack of concrete confinement which translates into columns with poor shear resistance which tend to have a brittle failure mode. By retrofitting with prestressing strands, placed at closer spacing than the original hoops, the concrete confinement is increased, diagonal tension resistance is improved and a more ductile response is attained. Experiments from the first phase of this research program, performed by Yalcin (1997), gave very favourable results for a given aspect ratio and reinforcement arrangement. The present experimental research, forming the second phase, examined columns with different aspect ratios and reinforcement arrangements and also gave favourable results.

Download or read book Seismic Design Aids for Nonlinear Pushover Analysis of Reinforced Concrete and Steel Bridges written by Jeffrey Ger and published by CRC Press. This book was released on 2011-08-18 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear static monotonic (pushover) analysis has become a common practice in performance-based bridge seismic design. The popularity of pushover analysis is due to its ability to identify the failure modes and the design limit states of bridge piers and to provide the progressive collapse sequence of damaged bridges when subjected to major earthquakes. Seismic Design Aids for Nonlinear Pushover Analysis of Reinforced Concrete and Steel Bridges fills the need for a complete reference on pushover analysis for practicing engineers. This technical reference covers the pushover analysis of reinforced concrete and steel bridges with confined and unconfined concrete column members of either circular or rectangular cross sections as well as steel members of standard shapes. It provides step-by-step procedures for pushover analysis with various nonlinear member stiffness formulations, including: Finite segment–finite string (FSFS) Finite segment–moment curvature (FSMC) Axial load–moment interaction (PM) Constant moment ratio (CMR) Plastic hinge length (PHL) Ranging from the simplest to the most sophisticated, the methods are suitable for engineers with varying levels of experience in nonlinear structural analysis. The authors also provide a downloadable computer program, INSTRUCT (INelastic STRUCTural Analysis of Reinforced-Concrete and Steel Structures), that allows readers to perform their own pushover analyses. Numerous real-world examples demonstrate the accuracy of analytical prediction by comparing numerical results with full- or large-scale test results. A useful reference for researchers and engineers working in structural engineering, this book also offers an organized collection of nonlinear pushover analysis applications for students.