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Fatigue Performance Of Aashto And Ontario Design For Non Composite Reinforced Concrete Bridge Decks Microform
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Author :Petrou, Michael Frixos Publisher :Ann Arbor, Mich. : University Microfilms International ISBN 13 : Total Pages :275 pages Book Rating :4.:/5 (222 download)
Book Synopsis Fatigue Performance of AASHTO and Ontario Design for Non-composite Reinforced Concrete Bridge Decks [microform] by : Petrou, Michael Frixos
Download or read book Fatigue Performance of AASHTO and Ontario Design for Non-composite Reinforced Concrete Bridge Decks [microform] written by Petrou, Michael Frixos and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 19?? with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Strength and Stiffness of Reinforced Concrete Bridge Decks by : P. C. Perdikaris
Download or read book Fatigue Strength and Stiffness of Reinforced Concrete Bridge Decks written by P. C. Perdikaris and published by . This book was released on 1993 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Reinforced Concrete Bridge Decks Under Moving Loads by : PC. Perdikaris
Download or read book Design of Reinforced Concrete Bridge Decks Under Moving Loads written by PC. Perdikaris and published by . This book was released on 1998 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents design recommendations of non-composite reinforced concrete bridge decks subjected to fatigue due to moving loads. These recommendations are based on test results of 1/3- and 1/6.6- scale physical models of a full-scale 21.6-cm (8.5 in.) thick and 15.24-m (50-ft) long simply supported non-composite reinforced concrete deck. Concrete bridge decks should be designed to transfer the load in a two-way action. Experimental results show that the two-way slab action in the decks changes to a one-way action (transverse direction) as fatigue damage due to a moving wheel-load accumulates. It is recommended to adopt an isotropic steel reinforcing pattern. An isotropic reinforcing pattern with a steel ratio of 0.3 % (each top and bottom layer) in each direction appears to be adequate. A similar reinforcing amount and pattern is required by the Ontario bridge design Code. The required steel content is therefore reduced resulting in substantial savings in the bridge deck construction costs and improving the corrosion resistance in decks, especially in the presence of deicing chemicals. It appears that flexural cracking in the deck and bond failure at the steel-concrete interface are necessary and sufficient conditions for deck failure under traffic loads. It is, thus, highly desirable to preclude or at least limit cracking and maximize the bond strength of the steel rebars.
Book Synopsis Fatigue Behavior of Concrete Bridge Decks Cast on GFRP Stay-in-place Structural Forms and Static Performance of GFRP-reinforced Deck Overhangs by : Patrick Richardson
Download or read book Fatigue Behavior of Concrete Bridge Decks Cast on GFRP Stay-in-place Structural Forms and Static Performance of GFRP-reinforced Deck Overhangs written by Patrick Richardson and published by . This book was released on 2013 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first part of the thesis addresses the fatigue performance of concrete bridge decks with GFRP stay-in-place structural forms replacing the bottom layer of rebar. The forms were either flat plate with T-up ribs joined using lap splices, or corrugated forms joined through pin-and-eye connections. The decks were supported by simulated Type III precast AASHTO girders spaced at 1775mm (6ft.). Two surface preparations were examined for each GFRP form, either using adhesive coating that bonds to freshly cast concrete, or simply cleaning the surface before casting. For the bonded deck with flat-ribbed forms, adhesive bond and mechanical fasteners were used at the lap splice, whereas the lap splice of the unbonded deck had no adhesive or fasteners. All the decks survived 3M cycles at 123kN service load of CL625 CHBDC design truck. The bonded flat-ribbed-form deck survived an additional 2M cycles at a higher load simulating a larger girder spacing of 8ft. Stiffness degradations were 9-33% with more reduction in the unbonded specimens. Nonetheless, live load deflections of all specimens remained below span/1600. The residual ultimate strengths after fatigue were reduced by 5% and 27% for the flat-ribbed and corrugated forms, respectively, but remained 7 and 3 times higher than service load. The second part of the thesis investigates the performance of bridge deck overhangs reinforced by GFRP rebar. Overhangs of full composite slab-on-girder bridge decks at 1:2.75 scale were tested monotonically under an AASHTO tire pad. Five tests were conducted on overhangs of two lengths: 260mm and 516mm, representing scaled overhangs of 6ft. and 8ft. girder spacing, respectively. The 260mm overhang was completely reinforced with GFRP rebar while the 516mm overhang consisted of a GFRP-reinforced section and a steel-reinforced section. The peak loads were approximately 2 to 3 times the established equivalent service load of 24.3kN, even though the overhangs were not designed for flexure according to the CHBDC but rather with lighter minimum reinforcement in anticipation of shear failure. The failure mode Abstract ii of each overhang section was punching shear. The steel-reinforced overhang section exhibited a greater peak load capacity (13.5%) and greater deformability (35%) when compared to the GFRP-reinforced overhang section.
Book Synopsis Field Performance of a Reinforced Concrete Bridge Deck Using 45 Percent Less Reinforcement Than Required by the American Association of State Highway and Transportation Officials by : Habib Joseph Dagher
Download or read book Field Performance of a Reinforced Concrete Bridge Deck Using 45 Percent Less Reinforcement Than Required by the American Association of State Highway and Transportation Officials written by Habib Joseph Dagher and published by . This book was released on 2000 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report compares the field performance of two reinforced-concrete bridge deck sections designed using the American Association of State Highway and Transportation Officials (AASHTO) specifications and the Ontario Highway Bridge Design Code (OHBDC) isotropic reinforcement method. For direct comparison of their field performance under similar conditions, the two bridge deck sections were incorporated into the same bridge. The two-lane, five-span bridge, called the Ferry Hill Bridge, is located in Orono, Maine. It is 450 ft long and 46 ft, 8 in. wide and consists of longitudinal steel girders with a monolithic 8-in.-thick reinforced-concrete deck. The field performance of the two deck sections was evaluated over a seven-year period by measuring rebar strains at 28 locations in the deck and conducting visual inspections of the underside of the concrete deck.
Book Synopsis Fatigue Evaluation of Multiple Fiber-Reinforced Polymer Bridge Deck Systems Over Existing Girders Phase II Report by :
Download or read book Fatigue Evaluation of Multiple Fiber-Reinforced Polymer Bridge Deck Systems Over Existing Girders Phase II Report written by and published by . This book was released on 2003 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decks manufactured with fiber-reinforced polymer (FRP) composite materials are used in highway bridges. A performance evaluation of FRP composite decks subjected to simulated traffic loads that induce repetitive stress cycles under extremely high and low temperature is presented. Fatigue testing of three FRP composite bridge deck prototypes and one FRP-concrete hybrid bridge deck prototype under two extreme temperature conditions: -30 C ( -22 F), and 50 C (122 F) was conducted. The fatigue response of the deck prototypes was correlated with the baseline performance of a conventional reinforced concrete deck subjected to similar test conditions. Design loads were applied simultaneously at two points using servo-controlled hydraulic actuators specially designed and fabricated to perform under extreme temperatures. Quasi-static load-deflection and load-strain characteristics were determined at predetermined fatigue cycle levels. No significant distress was observed in any of the composite deck prototypes during ten million load cycles. The effects of extreme temperatures and accumulated load cycles on the load-deflection and load-strain response of FRP composite and FRP-concrete hybrid bridge decks are discussed based on the experimental results.
Book Synopsis AASHTO LRFD Bridge Design Guide Specifications for GFRP-reinforced Concrete by :
Download or read book AASHTO LRFD Bridge Design Guide Specifications for GFRP-reinforced Concrete written by and published by . This book was released on 2018 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparative Fatigue Performance of Steel-reinforced and Steel-free Concrete Bridge Deck Slabs by : Amjad Hussain Memon
Download or read book Comparative Fatigue Performance of Steel-reinforced and Steel-free Concrete Bridge Deck Slabs written by Amjad Hussain Memon and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Small Scale Model Tests written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the major tasks of an on-going research project is to improve the current AASHTO design approach of reinforced concrete bridge deck slabs. Tests are conducted on non-composite reinforced concrete bridge deck models supported on steel girders to study the failure mechanisms under static, fixed pulsating and moving wheel-loads. This paper presents the test results of two 1/6.6 (B-series) bridge deck models of an 8.5 in. thick and 50 ft. long prototype concrete bridge deck supported on four simply supported steel girders spaced at 10 ft. and subjected to a static concentrated wheel-load. The effect of lateral restraint and amount of reinforcement (Ontario vs. AASHTO design) on the arching action mechanism and the load-deflection response of the bridge model decks is determined and discussed. Tests are also reported on 1/6.6 (B-series) and 1/3 scale (P-series) deck panels simply supported between two adjacent steel girders to evaluate any size effects on the static ultimate strength of the B-series deck models. In addition to the load-deflection curves, cracking pattern, failure mode and a comparison between the observed ultimate strength values and those predicted by the yield-line theory and ACI code are presented. Strains are measured in the reinforcing bars and on the concrete surface; membrane compressive forces in the decks have been estimated but are not included in this paper. For the covering abstract of the Conference see IRRD Abstract No. 807839.
Download or read book Failed Bridges written by Joachim Scheer and published by John Wiley & Sons. This book was released on 2011-08-24 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gilt immer noch, dass ein Bauwerkseinsturz der beste Lehrmeister für den Fortschritt des Bauens ist? Oder, anders formuliert: Ist Bauen dann, wenn wir das Bewährte verlassen und Neues wagen, "Experimentieren"? Über die Ursache von Schadensfällen und Einstürzen, die oft mit dem Verlust von Menschenleben verbunden sind, wird nicht gern öffentlich gesprochen. Aber aus Fehlern kann man lernen. Die Lehren und Erfahrungen aus den Schadensauswertungen führen zu mehr Sicherheit und oft zum Innovationsschub. Die Kenntnis der Schadensursachen ist Voraussetzung für ihre zukünftige Vermeidung. Mit diesem Buch liegt eine systematische Zusammenstellung von über 400 Versagensfällen vor, die in besonderer Weise betrachtet werden: Sie werden nach dem Zeitpunkt ihres Auftretens im Lebenszyklus der Brücke, z. B. im Bauzustand oder im Betrieb, und nach den Schadensereignissen, z. B. Anprall oder Erdbeben, geordnet. Die wichtigsten Ursachen sind: menschliches Versagen, mangelnde Aussteifung, Materialversagen oder Überlastung. Es werden vorwiegend Brückeneinstürze, die in der Literatur wenig oder nach dem Urteil des Verfassers nicht vollständig oder nicht zutreffend behandelt sind, ausführlich analysiert. Mit Akribie gesammelt, kompetent und exzellent aufgearbeitet und mit Mut präsentiert, ergibt dies eine unverzichtbare Erkenntnisquelle für jeden Bauingenieur in der Praxis und für das Studium. Ein Katalog von Regeln wurde erstellt. Seine Beachtung kann helfen, Fehler bei Entwurf, Planung und Ausführung zu vermeiden.
Book Synopsis Guide Specifications for Seismic Isolation Design by :
Download or read book Guide Specifications for Seismic Isolation Design written by and published by AASHTO. This book was released on 2010 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition is based on the work of NCHRP project 20-7, task 262 and updates the 2nd (1999) edition -- P. ix.
Book Synopsis Supplementary Cementing Materials by : Rafat Siddique
Download or read book Supplementary Cementing Materials written by Rafat Siddique and published by Springer Science & Business Media. This book was released on 2011-03-28 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an attempt to consolidate the published research related to the use of Supplementary Cementing Materials in cement and concrete. It comprises of five chapters. Each chapter is devoted to a particular supplementing cementing material. It is based on the literature/research findings published in journals/conference proceeding, etc. Topics covered in the book are; coal fly ash, silica fume (SF), granulated blast furnace slag (GGBS), metakaolin (MK), and rice husk ash (RHA). Each chapter contains introduction, properties of the waste material/by-product, its potential usage, and its effect on the properties of fresh and hardened concrete and other cement based materials.
Book Synopsis Operational Analysis of Bus Lanes on Arterials by : Kevin St. Jacques
Download or read book Operational Analysis of Bus Lanes on Arterials written by Kevin St. Jacques and published by Transportation Research Board. This book was released on 1997 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains guidelines for estimating bus lane capacities and speeds along arterial streets. It recommends level-of-service thresholds for buses based on speed, and it presents procedures for estimating the speed of buses using dedicated bus lanes on arterial streets.
Download or read book Earth Manual written by and published by Reclamation Bureau. This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: On cover: A guide to the use of soils as foundations and as construction materials for hydraulic structures. Provides a compilation of the soil testing procedures currently used by the Bureau of Reclamation.
Book Synopsis Concrete Manual by : United States. Bureau of Reclamation
Download or read book Concrete Manual written by United States. Bureau of Reclamation and published by . This book was released on 1955 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forensic Engineering by : Alicia Díazde León
Download or read book Forensic Engineering written by Alicia Díazde León and published by . This book was released on 2012-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Sixth Congress on Forensic Engineering, held in San Francisco, California, October 31-November 3, 2012. Sponsored by the Technical Council on Forensic Engineering of ASCE. This collection contains 144 peer-reviewed papers presenting findings intended to help forensic engineers develop practices and procedures to reduce the number of failures, disseminate information on failures, and provide guidelines for conducting failure investigations and for ethical conduct. Topics include: bridges; building envelopes; critical infrastructure; design practices; disaster risk management; education; emerging technologies; fires; floods; flooring; geotechnical failures; hurricanes, tornadoes, and extreme winds; investigative methodologies; practices to reduce failures; professional practice; research and testing; residential construction; and structural failures. This will be valuable to engineers, researchers, educators, and students involved in forensic engineering.
Download or read book Japanese Railway Engineering written by and published by . This book was released on 1993 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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