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Author : Hesson Park
Publisher :
ISBN 13 :
Total Pages : 139 pages
Book Rating : 4.:/5 (528 download)
Download or read book Model-based Optimization of Ultra High Performance Concrete Highway Bridge Girders written by Hesson Park and published by . This book was released on 2003 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Melvin Soh
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (528 download)
Download or read book Model-based Design of a Ultra High Performance Concrete Prototype Highway Bridge Girder written by Melvin Soh and published by . This book was released on 2003 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ekkehard Fehling
Publisher : kassel university press GmbH
ISBN 13 : 3899583760
Total Pages : 922 pages
Book Rating : 4.8/5 (995 download)
Download or read book Ultra High Performance Concrete written by Ekkehard Fehling and published by kassel university press GmbH. This book was released on 2008-01-01 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : FIB – International Federation for Structural Concrete
Publisher : FIB - Féd. Int. du Béton
ISBN 13 :
Total Pages : 344 pages
Book Rating : 4./5 ( download)
Download or read book Proceedings fib Symposium in Avignon France written by FIB – International Federation for Structural Concrete and published by FIB - Féd. Int. du Béton. This book was released on 2004-04-01 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Thomas E. Cousins
Publisher : Transportation Research Board
ISBN 13 : 030925888X
Total Pages : 91 pages
Book Rating : 4.3/5 (92 download)
Download or read book High-performance/high-strength Lightweight Concrete for Bridge Girders and Decks written by Thomas E. Cousins and published by Transportation Research Board. This book was released on 2013 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Report 733: High-Performance/High-Strength Lightweight Concrete for Bridge Girders and Decks presents proposed changes to the American Association of State Highway and Transportation Officials' Load and Resistance Factor Design (LRFD) bridge design and construction specifications to address the use of lightweight concrete in bridge girders and decks. The proposed specifications are designed to help highway agencies evaluate between comparable designs of lightweight and normal weight concrete bridge elements so that an agency's ultimate selection will yield the greatest economic benefit. The attachments contained in the research agency's final report provide elaborations and detail on several aspects of the research. Attachments A and B provide proposed changes to AASHTO LRFD bridge design and bridge construction specifications, respectively; these are included in the print and PDF version of the report. Attachments C through R are available for download below. Attachments C, D, and E contain a detailed literature review, survey results, and a literature summary and the approved work plan, respectively. Attachment C; Attachment D ; Attachment E; Attachments F through M provide details of the experimental program that were not able to be included in the body of this report. Attachment F; Attachment G; Attachment H; Attachment I; Attachment J; Attachment K; Attachment L; Attachment M. Attachments N through Q present design examples of bridges containing lightweight concrete and details of the parametric study. Attachment N; Attachment O; Attachment P; Attachment Q. Attachment R is a detailed reference list."--Publication information.
Author : H. G. Russell
Publisher :
ISBN 13 :
Total Pages : 776 pages
Book Rating : 4.3/5 (91 download)
Download or read book Seventh International Symposium on Utilization of High Strength/ High Performance Concrete written by H. G. Russell and published by . This book was released on 2005 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. P. De Wilde
Publisher : WIT Press
ISBN 13 : 184564106X
Total Pages : 577 pages
Book Rating : 4.8/5 (456 download)
Download or read book High Performance Structures and Materials IV written by W. P. De Wilde and published by WIT Press. This book was released on 2008 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: Including the latest developments in design, optimisation, manufacturing and experimentation, this text presents a wide range of topics relating to advanced types of structures, particularly those based on new concepts and new types of materials.
Author : Sandy Shuk-Yan Poon
Publisher :
ISBN 13 : 9780494594490
Total Pages : 290 pages
Book Rating : 4.5/5 (944 download)
Download or read book Optimization of Span-to-depth Ratios in High-strength Concrete Girder Bridges written by Sandy Shuk-Yan Poon and published by . This book was released on 2009 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Span-to-depth ratio is an important bridge design parameter that affects structural behaviour, construction costs and aesthetics. A study of 86 constant-depth girders indicates that conventional ratios have not changed significantly since 1958. These conventional ratios are now questionable, because recently developed high-strength concrete has enhanced mechanical properties that allow for slenderer sections.Based on material consumption, cost, and aesthetics comparisons, the thesis determines optimal ratios of an 8-span highway viaduct constructed with high-strength concrete. Three bridge types are investigated: cast-in-place on falsework box-girder and solid slabs, and precast segmental span-by-span box-girder. Results demonstrate that total construction cost is relatively insensitive to span-to-depth ratio over the following ranges of ratios: 10--35, 30--45, and 15--25 for the three bridge types respectively. This finding leads to greater freedom for aesthetic expressions because, compared to conventional values (i.e. 18--23, 22--39, and 16--19), higher ranges of ratios can now be selected without significant cost premiums.
Author : Hiroshi Yokota
Publisher : CRC Press
ISBN 13 : 100017381X
Total Pages : 8732 pages
Book Rating : 4.0/5 (1 download)
Download or read book Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations written by Hiroshi Yokota and published by CRC Press. This book was released on 2021-04-20 with total page 8732 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author : Maher K. Tadros
Publisher : Transportation Research Board
ISBN 13 : 030908766X
Total Pages : 73 pages
Book Rating : 4.3/5 (9 download)
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.
Author : FIB – International Federation for Structural Concrete
Publisher : FIB - Féd. Int. du Béton
ISBN 13 : 1617828211
Total Pages : 5718 pages
Book Rating : 4.6/5 (178 download)
Download or read book 3rd fib Congress Washington USA written by FIB – International Federation for Structural Concrete and published by FIB - Féd. Int. du Béton. This book was released on 2010-06-01 with total page 5718 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mark P. Manning
Publisher :
ISBN 13 :
Total Pages : 736 pages
Book Rating : 4.:/5 (958 download)
Download or read book Design and Comparative Flexural Analysis of Prestressed Bridge Girders Using High Performance and Locally Developed Ultra-high Performance Concretes written by Mark P. Manning and published by . This book was released on 2015 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-high performance concrete (UHPC) is an innovative material that provides exceptional mechanical and durability properties and differs significantly from conventional concretes. Exhibiting high compressive strengths, improved environmental resistance, and increased tensile strengths and post-cracking capacity from fiber reinforcement, UHPC offers substantial advantages to a variety of structural applications by providing smaller, lighter structural members with increased design life and reduced lifecycle maintenance. Even so, widespread implementation of this unique material has been slow, particularly in the US where standardized design procedures have yet to be developed and/or adopted. Recent research at New Mexico State University (NMSU) has led to the development of unique UHPC mixture proportions. Utilizing constituents typical of precast production and primarily local to New Mexico, as well as high strength steel fiber reinforcement, these mixture proportions exhibit the advance characteristics typical of UHPC. Providing an economic alternative to commercially available products, experimental testing is required prior to implementation in local design to validate the properties and behavior of this specific UHPC when applied to structural members. This research focused on the design, production, and flexural testing of full-scale prestressed UHPC girders. Based on replacement designs of a structurally deficient local bridge superstructure, two full-scale prestressed channel girders were designed using Conspan® superstructure design software according to 2012 American Association of State Highway and Transportation Officals (AASHTO) Load Resistance Factor Design (LRFD) Bridge Design Specifications. One specimen was designed using conventional high performance concrete (HPC) typical of current New Mexico bridge design, and the second section optimized for use of the locally developed UHPC presented in this thesis. The full-scale specimens were fabricated at a local precast plant, using previously developed batching and curing procedures which were continued to be evaluated for efficiency and economy. This procedure aided in familiarizing precasters with the production of UHPC and helps to promote further implementation of UHPC in local production and design. The completed specimens were then tested in longitudinal four-point bending and transverse three-point bending to investigate flexural behavior and performance. Through comparative analyses of the full-scale prestressed specimens, evidence of the advanced characteristics and performance of UHPC versus conventional HPC are provided. Additional comparision of measured properties and behavior versus design values and predictions, recommendations are made for the incorporation of UHPC design provisions in AASHTO LRFD Bridge Design Specifications.
Author : Benjamin A. Graybeal
Publisher :
ISBN 13 :
Total Pages : 133 pages
Book Rating : 4.:/5 (466 download)
Download or read book Structural Behavior of a Prototype Ultra-high Performance Concrete Pi-girder written by Benjamin A. Graybeal and published by . This book was released on 2009 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Ultra-high performance concrete (UHPC) is an advanced cementitious composite material which has been developed in recent decades. When compared to more conventional cement-based concrete materials, UHPC tends to exhibit superior properties such as increased durability, strength, and long-term stability. This experimental investigation focused on the structural behavior of a newly developed highway bridge girder cross section, namely the pi-girder. This girder was developed and optimized specifically to exploit the advanced mechanical and durability properties of UHPC. Structural testing was completed on girders and sections of girders so as to investigate the flexural response, the shear response, the transverse flexural response, and the lateral load distribution capabilities of the girder. The knowledge gained through this study present a path forward to a viable structurally-optimized UHPC bridge superstructure system. Further development of the pi-girder system is underway"--Technical report documentation p.
Author : Devin K. Harris
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (1 download)
Download or read book Characterization of the Punching Shear Capacity of Thin Ultra-high Performance Concrete Slabs written by Devin K. Harris and published by . This book was released on 2005 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-high performance concrete (UHPC) is a relatively new type of concrete that exhibits mechanical properties that are far superior to those of conventional concrete and in some cases rival those of steel. The main characteristics that distinguish UHPC from conventional reinforced concrete are its very high compressive strength (20 to 33 ksi), the addition of steel fibers which enables tension to be carried across open cracks without conventional reinforcing steel, and a very high resistance to corrosion and degradation. The mechanical properties of UHPC allow for smaller, thinner sections as compared to conventional reinforced concrete sections. However, as it is a new material, the use of UHPC has been limited to a few structural applications due primarily to the high cost of the material and the lack of established design guidelines. In previous research, a material model based on physical tests was used in conjunction with finite element models to develop an optimized cross-section for a prestressed UHPC girder for bridge applications. The cross-section is a double-tee with bulbs at the bottoms of the webs to accommodate the prestressing strands. As it is envisioned in bridge applications, the double-tees will be placed directly adjacent to one another, and the top flange will act as the riding surface after a thin asphalt overlay is placed. Based on the longitudinal compressive stresses, the top flange of the girder can be quite thin. However, there exists the possibility that a punching shear failure could occur from the application of a point load such as a wheel patch load if the flange is made too thin. The research reported herein was initiated to characterize the punching shear capacity of thin UHPC plates and to develop recommendations on the minimum top flange thickness for the optimized double-tee. Twelve small slabs (45 in x 45 in) were tested to failure to characterize the punching shear strength of UHPC. The variables considered were the slab thickness (2, 2.5, and 3 in) and loading plate dimensions (from 1 in x 1 in to 3 in x 3 in). The results of the testing were compared to several existing models for punching shear. The two equations that predicted strengths most reliably were the current ACI punching shear equation and a modified bolt pull-out equation. After evaluation of the test results, the minimum slab thickness required to prevent a punching shear failure in the top flange due to an 8 in x 20 in wheel patch was determined to be 1 in. Three larger slabs were also tested. These slabs had the same clear span length as the top flange of the optimized double-tee and were loaded with a wheel patch load. The slabs were all approximately 3 in thick and all failed in flexure rather than punching shear. It was concluded that the casting method has a strong influence on the orientation of the steel fibers, which in turn influences the flexural strength in orthogonal directions in the slab. The top flange thickness will be governed by transverse bending rather than punching shear, and the 3 in slabs were not able to support the full wheel load plus impact and load factor. The results of this research help in the continued optimization of a UHPC shape for use in highway bridges. If material use in the girder is minimized, UHPC bridges can become economically competitive with HPC bridges, but offer the benefits of more rapid construction and better durability.
Author : U. S. Department of Transportation
Publisher : Lulu.com
ISBN 13 : 9781329831513
Total Pages : 176 pages
Book Rating : 4.8/5 (315 download)
Download or read book Ultra-High Performance Concrete: A State-Of-The-Art Report for the Bridge Community written by U. S. Department of Transportation and published by Lulu.com. This book was released on 2016-01-14 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-high performance concrete (UHPC) is an advanced construction material that affords new opportunities for the future of the highway infrastructure. The Federal Highway Administration has been engaged in research on the optimal uses of UHPC in the highway bridge infrastructure since 2001 through its Bridge of the Future initiative. This report presents the state of the art in UHPC with regard to uses in the highway transportation infrastructure. Compiled from hundreds of references representing research, development, and deployment efforts around the world, this report provides a framework for gaining a deeper understanding of UHPC as well as a platform from which to increase the use of this class of advanced cementitious composite materials. This report will assist stakeholders, including State transportation departments, researchers, and design consultants, to grasp the capabilities of UHPC and thus use the material to address pressing needs in the highway transportation infrastructure.
Author : Benjamin A. Graybeal
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.:/5 (466 download)
Download or read book Structural Behavior of a Second Generation Ultra-high Performance Concrete Pi-girder written by Benjamin A. Graybeal and published by . This book was released on 2009 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Ultra-high performance concrete (UHPC) is an advanced cementitious composite material which has been developed in recent decades. When compared to more conventional cement-based concrete materials, UHPC tends to exhibit superior properties such as increased durability, strength, and long-term stability. This experimental investigation focused on the further development and structural testing of a newly developed highway bridge girder cross section, namely the pi-girder. This girder was developed and optimized specifically to exploit the advanced mechanical and durability properties of UHPC. Structural testing was completed on full-scale girders to investigate the transverse flexural response and the longitudinal joint structural behavior. The 2nd generation pi-girder system surpassed the AASHTO LRFD Bridge Design Specification demands for which it was designed"--Technical report documentation p.
Author : George C. Lee
Publisher :
ISBN 13 :
Total Pages : 221 pages
Book Rating : 4.:/5 (93 download)
Download or read book Seismic Performance Evaluation of Precast Girders with Field-cast Ultra High Performance Concrete (UHPC) Connections written by George C. Lee and published by . This book was released on 2014 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Ultra-high performance concrete (UHPC) is an advanced cementitious composite material which provides new opportunities to significantly enhance the performance of field-cast connections. The use of UHPC in precast concrete bridge superstructure components can offer many advantages compared to conventional cast-in-place decks, especially higher quality and durability as well as ease of construction. However, the appropriate installation of connecting elements is a key challenge in completing the overall bridge system. It is recognized that the state of the practice with regard to deck-level connecting elements has been lacking in terms of resiliency and durability. The Federal Highway Administration's ongoing research program into the use of Ultra-High Performance Concrete (UHPC) in highway bridges has recently focused on deck-level connections between modular precast components. Field-cast UHPC connections can facilitate the construction of an emulative bridge deck system whose behaviors should meet or exceed those of a conventional cast-inplace bridge deck. However, many bridge owners may be hesitant to embrace UHPC bridge deck component technology due to a lack of knowledge of the seismic performance of field-cast UHPC connections. The seismic responses of connections under severe earthquakes need to be investigated to facilitate the wider use of these modular bridge deck systems, especially in high seismic zones. The major objective of this study is to evaluate the seismic performance of two precast deck-bulb-tee girders with field-cast UHPC connections. A series of shake table tests are performed to analyze the seismic behavior of the girders and UHPC connections"--Page v.
