Full Depth Shear Key Performance In Adjacent Prestressed Beam Bridges
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Full Depth Shear Key Performance In Adjacent Prestressed Beam Bridges
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Author : Jyotirmay Lall
language : en
Publisher:
Release Date : 1997
Full Depth Shear Key Performance In Adjacent Prestressed Beam Bridges written by Jyotirmay Lall and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Box girder bridges categories.
Bridge decks supported by adjacent precast/prestressed-concrete beams have become increasingly popular in recent years due to their ease of construction, shallow superstructure, and aesthetic appeal. In New York, such structures are built by placing a number of precast beams alongside one another and connecting them through grouted keyways called "shear keys". After the grout hardens, the beams are transversely post-tensioned and a composite, cast-in-place deck is poured over them. Before 1992, field inspection personnel frequently reported the appearance of longitudinal deck cracking over these partial-depth shear keys soon after construction. In response, a new system using full-depth shear keys with more transverse tendons was adopted in 1992. Since then, more than 100 such bridges have been built statewide. To evaluate their performance, a followup inspection survey was conducted in 1996 on 91 such bridges.
Adjacent Box Beam Connections Performance And Optimization
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Author : Jiqiu Yuan
language : en
Publisher:
Release Date : 2018
Adjacent Box Beam Connections Performance And Optimization written by Jiqiu Yuan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Box girder bridges categories.
Precast prestressed concrete adjacent box beam bridges are widely utilized for short- and medium-span bridges throughout North America. However, a recurring issue with this bridge type is the deterioration of the shear key connection, resulting in substandard performance of the overall bridge system. This research investigated partial- and full-depth connection designs utilizing conventional non-shrink grout and ultra-high performance concrete (UHPC) by conducting full-scale structural testing. Quantitative measures to evaluate the connection performance that may assist in examining similar types of bridges are suggested in this study. A model to calculate the shear force in the connection is proposed, and both the shear and tensile stresses at the connection are analyzed. The findings can be used to assist in the design of connections for this bridge type. The performance of conventionally grouted and UHPC connections are presented and compared. It was found that the adjacent box beam bridges with UHPC connections can be a resilient bridge superstructure system, providing an innovative solution that can advance the state of the practice in bridge construction. This report corresponds to the accompanying TechBrief, Adjacent Box Beam Connections: Performance and Optimization.
Adjacent Precast Concrete Box Beam Bridges
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Author : H. G. Russell
language : en
Publisher: Transportation Research Board
Release Date : 2009
Adjacent Precast Concrete Box Beam Bridges written by H. G. Russell and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Box beams categories.
At head of title: National Cooperative Highway Research Program.
Testing Of Full Scale Prestressed Beams To Evaluate Shear Key Performance
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Author : Richard A. Miller (Professional engineer)
language : en
Publisher:
Release Date : 1998
Testing Of Full Scale Prestressed Beams To Evaluate Shear Key Performance written by Richard A. Miller (Professional engineer) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Box beams categories.
Adjacent box girder bridges use grouted shear keys to transfer load between beams. These shear keys tend to crack and leak. A full-scale portion of an adjacent box girder bridge was used to test the performance of grouted shear keys under environmental and cyclic loads. Strain gages were placed in the girders and in the shear keys. Displacement gages were placed spanning the shear keys on the top and bottom flanges of the girders. The bridge was subjected to simulated cyclic truck loading as well as environmentally induced thermal loading. The pulse velocity method was employed to find cracks in shear keys. Dye penetration was used to confirm the pulse velocity measurements. The total research project consisted of: (a) testing of the current keyway detail using the currently specified nonshrink grout, (b) testing of the current keyway detail but substituting epoxy grout for the nonshrink grout, and (c) testing of a modified keyway detail using nonshrink grout in which the keyway is moved to the neutral axis of the girder. In the first test, the shear keys were grouted in late autumn and cracked soon after casting, before any simulated vehicle loading had been applied.
Modern Techniques In Bridge Engineering
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Author : Khaled Mahmoud
language : en
Publisher: CRC Press
Release Date : 2011-08-26
Modern Techniques In Bridge Engineering written by Khaled Mahmoud and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-08-26 with Science categories.
Due to significant economic growth in the last few decades, increasing traffic loads impose tremendous demand on bridge structures. This, coupled with ongoing deterioration of bridges, introduces a unique challenge to bridge engineers in maintaining service of these infrastructure assets without disruption to vital economic and social activities. This requires innovative solutions and optimized methodologies to achieve safe and efficient operation of bridge structures. Bridge engineering practitioners, researchers, owners, and contractors from all over the world presented on modern techniques in design, inspection, monitoring and rehabilitation of bridge structures, at the Sixth New York City Bridge Conference held New York City on July 25-26, 2011. This book contains a select number of papers presented at the conference. This group of papers provides a state-of-the-art in bridge engineering and is of interest to any reader in the field.
Advances In Bridge Maintenance Safety Management And Life Cycle Performance Set Of Book Cd Rom
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Author : Paulo J. da Sousa Cruz
language : en
Publisher: CRC Press
Release Date : 2015-03-02
Advances In Bridge Maintenance Safety Management And Life Cycle Performance Set Of Book Cd Rom written by Paulo J. da Sousa Cruz and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-03-02 with Technology & Engineering categories.
Advances in bridge maintenance, safety, management and life-cycle performance contains the papers presented at IABMAS'06, the Third International Conference of the International Association for Bridge Maintenance and Safety (IABMAS), held in Porto, Portugal from 16 to 19 July, 2006.All major aspects of bridge maintenance, management, safety, and co
Reflective Cracking Of Shear Keys In Multi Beam Bridges
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Author : Graeme Peter Sharpe
language : en
Publisher:
Release Date : 2010
Reflective Cracking Of Shear Keys In Multi Beam Bridges written by Graeme Peter Sharpe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Multi-beam bridges made from precast concrete box girders are one of the most common bridge types used in the United States. One problem that affects these bridges is the development of longitudinal or reflective cracks on the road surface because of failure of the shear keys. Some states have attempted to correct this problem by redesigning the shear key or adding post-tensioning, but the problem persists in many new bridges. The purpose of this study is to investigate why these shear key failures are occurring. This project studies two types of box girder designs, the common Precast/Prestressed Concrete Institute (PCI) box girder bridges and the Texas Department of Transportation (TxDOT) box girder bridge. In the past, reflective cracking has occurred in bridges of both types. The analysis procedure involves finite element analyses of bridge models with realistic support and loading conditions, and comparing the PCI and TxDOT bridges. The results indicate that both PCI and TxDOT box girder have sufficient strength to resist cracking from vehicular loads, but uneven temperature changes and shrinkage strains cause high tensile stresses in the shear key regions and lead to reflective cracking. The analyses showed the highest stresses were often times near the supports, rather than at midspan. Past studies have proposed using larger composite deck slabs, transverse post-tensioning, or full-depth shear keys to prevent shear key failure. Composite slabs were the most effective way to reduce high stresses in shear keys, and were effective for all loading cases considered. Post-tensioning and full-depth keys also showed a reduction in shear key stresses, but were less effective.
Bridge Maintenance Safety Management Life Cycle Sustainability And Innovations
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Author : Hiroshi Yokota
language : en
Publisher: CRC Press
Release Date : 2021-04-20
Bridge Maintenance Safety Management Life Cycle Sustainability And Innovations written by Hiroshi Yokota and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-04-20 with Technology & Engineering categories.
Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations contains lectures and papers presented at the Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020), held in Sapporo, Hokkaido, Japan, April 11–15, 2021. This volume consists of a book of extended abstracts and a USB card containing the full papers of 571 contributions presented at IABMAS 2020, including the T.Y. Lin Lecture, 9 Keynote Lectures, and 561 technical papers from 40 countries. The contributions presented at IABMAS 2020 deal with the state of the art as well as emerging concepts and innovative applications related to the main aspects of maintenance, safety, management, life-cycle sustainability and technological innovations of bridges. Major topics include: advanced bridge design, construction and maintenance approaches, safety, reliability and risk evaluation, life-cycle management, life-cycle sustainability, standardization, analytical models, bridge management systems, service life prediction, maintenance and management strategies, structural health monitoring, non-destructive testing and field testing, safety, resilience, robustness and redundancy, durability enhancement, repair and rehabilitation, fatigue and corrosion, extreme loads, and application of information and computer technology and artificial intelligence for bridges, among others. This volume provides both an up-to-date overview of the field of bridge engineering and significant contributions to the process of making more rational decisions on maintenance, safety, management, life-cycle sustainability and technological innovations of bridges for the purpose of enhancing the welfare of society. The Editors hope that these Proceedings will serve as a valuable reference to all concerned with bridge structure and infrastructure systems, including engineers, researchers, academics and students from all areas of bridge engineering.
Experimental Evaluation Of Full Depth Precast Prestressed Concrete Bridge Deck Panels
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Author : Mohsen A. Issa
language : en
Publisher:
Release Date : 2002
Experimental Evaluation Of Full Depth Precast Prestressed Concrete Bridge Deck Panels written by Mohsen A. Issa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Concrete bridges categories.
A literature review concerning the objectives of the project was completed. A significant number of published papers, reports, etc., were examined to determine the effectiveness of full depth precast panels for bridge deck replacement. A detailed description of the experimental methodology was developed which includes design and fabrication of the panels and assembly of the bridge. The design and construction process was carried out in cooperation with the project Technical Review Panel. The major components of the bridge deck system were investigated. This includes the transverse joints and the different materials within the joint as well as composite action. The materials investigated within the joint were polymer concrete, non-shrink grout, and set-45 for the transverse joint. The transverse joints were subjected to direct shear tests, direct tension tests, and flexure tests. These tests exhibited the excellent behavior of the system in terms of strength and failure modes. Shear key tests were also conducted. The shear connection study focused on investigating the composite behavior of the system based on varying the number of shear studs within a respective pocket as well as varying the number of pockets within a respective panel. The results indicated that this shear connection is extremely efficient in rendering the system under full composite action. Finite element analysis was conducted to determine the behavior of the shear connection prior to initiation of the actual full scale tests. In addition, finite element analysis was also performed with respect to the transverse joint tests in an effort to determine the behavior of the joints prior to actual testing. The most significant phase of the project was testing a full-scale model. The bridge was assembled in accordance with the procedures developed as part of the study on full-depth precast panels and the results obtained through this research. The system proved its effectiveness in withstanding the applied loading that exceeded eight times the truck loading in addition to the maximum negative and positive moment application. Only hairline cracking was observed in the deck at the maximum applied load. Of most significance was the fact that full composite action was achieved between the precast panels and the steel supporting system, and the exceptional performance of the transverse joint between adjacent panels.
Proceedings Of The Canadian Society Of Civil Engineering Annual Conference 2021
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Author : Scott Walbridge
language : en
Publisher: Springer Nature
Release Date : 2022-05-31
Proceedings Of The Canadian Society Of Civil Engineering Annual Conference 2021 written by Scott Walbridge and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-31 with Technology & Engineering categories.
This book comprises the proceedings of the Annual Conference of the Canadian Society of Civil Engineering 2021. The contents of this volume focus on specialty conferences in construction, environmental, hydrotechnical, materials, structures, transportation engineering, etc. This volume will prove a valuable resource for those in academia and industry.