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Evaluation Of Bridge Deck Utilizing Ontario Bridge Deck Design Method Instrumentation And Testing Of Two Reinforced Concrete Bridge Decks
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Book Synopsis Evaluation of Bridge Deck Utilizing Ontario Bridge Deck Design Method: Instrumentation and testing of two reinforced concrete bridge decks by : J. A. Puckett
Download or read book Evaluation of Bridge Deck Utilizing Ontario Bridge Deck Design Method: Instrumentation and testing of two reinforced concrete bridge decks written by J. A. Puckett and published by . This book was released on 1988 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Bridge Deck Utilizing Ontario Bridge Deck Design Method: Review of experimental and analytical research in lightly reinforced bridge decks by : J. A. Puckett
Download or read book Evaluation of Bridge Deck Utilizing Ontario Bridge Deck Design Method: Review of experimental and analytical research in lightly reinforced bridge decks written by J. A. Puckett and published by . This book was released on 1988 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HRIS Abstracts written by and published by . This book was released on 1989 with total page 1072 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Bridge Deck Utilizing Ontario Bridge Deck Design Method by : Jay Alan Puckett
Download or read book Evaluation of Bridge Deck Utilizing Ontario Bridge Deck Design Method written by Jay Alan Puckett and published by . This book was released on 1989 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nondestructive Evaluation of MoDOT Bridge Decks. N Phase 2 by : Lesley Sneed
Download or read book Nondestructive Evaluation of MoDOT Bridge Decks. N Phase 2 written by Lesley Sneed and published by . This book was released on 2014 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research has examined the use of nondestructive techniques for concrete bridge deck condition assessments. The primary nondestructive testing/evaluation (NDT/NDE) technique utilized in this research was ground-coupled ground penetrating radar (GPR). The objectives of this research were to examine the utility of the nondestructive techniques in evaluating the condition of MoDOT bridge decks to enable faster, better, and more cost-effective bridge deck assessments, and to determine the accuracy of the information provided.
Download or read book Transportation Research Record written by and published by . This book was released on 1974 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Canadian Society for Civil Engineering Publisher :Montreal, P.Q., Canada : Canadian Society for Civil Engineering = Société canadienne de g/nie civil ISBN 13 : Total Pages :1446 pages Book Rating :4.0/5 ( download)
Book Synopsis Developments in Short and Medium Span Bridge Engineering '94 by : Canadian Society for Civil Engineering
Download or read book Developments in Short and Medium Span Bridge Engineering '94 written by Canadian Society for Civil Engineering and published by Montreal, P.Q., Canada : Canadian Society for Civil Engineering = Société canadienne de g/nie civil. This book was released on 1994 with total page 1446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nondestructive Evaluation of Concrete Bridge Decks with Overlays by : Shibin Lin
Download or read book Nondestructive Evaluation of Concrete Bridge Decks with Overlays written by Shibin Lin and published by . This book was released on 2021 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete bridge deck overlays have been used in the United States since 1960 to extend the service life of deteriorated concrete bridge decks and improve reliability. Concrete bridge decks with overlays suffer various types of deterioration, so it is necessary to identify and assess the effectiveness of different nondestructive evaluation (NDE) technologies in the laboratory under controlled conditions and in the field under actual conditions. This report provides an overview of seven types of widely used overlays: asphalt with a liquid membrane, asphalt with a fabric membrane, asphalt without a membrane, silica fume-modified concrete, latex-modified concrete (LMC), epoxy polymer concrete, and polyester polymer concrete. This report identifies and ranks available and promising NDE technologies to assess the performance of different types of overlays and concrete bridge decks. This report describes laboratory validation on overlays for nine commonly used NDE technologies. The nine NDE technologies are: sounding, ultrasonic surface waves (USW), impact echo (IE), ultrasonic tomography (UT), impulse response (IR), ground-penetrating radar (GPR), electrical resistivity (ER), half-cell potential (HCP), and infrared thermography (IRT). This report details the results of laboratory tests validating the NDE technologies for the seven different types of overlays. Field validation using the RABITTM bridge deck assessment tool and manual testing equipment was also performed. Results from the study on which this report is based indicated that GPR was the most effective method for detecting defects in underlying concrete specimens through both bonded and debonded overlays; however, GPR could not detect overlay debonding. Results also showed that USW, IE, and UT were effective stress-wave-based methods for detecting defects under bonded overlays but not asphalt overlays. Researchers found that asphalt overlays at low temperatures (i.e., 32°F or below) improved the applicability of
Book Synopsis Evaluation of Bridge Deck Utilizing Ontario Bridge Deck Design Method: OHBDC static data (Sept. 1987), AASHTO static data (July 1987), AASHTO moving load data, OHBDC moving load data by : J. A. Puckett
Download or read book Evaluation of Bridge Deck Utilizing Ontario Bridge Deck Design Method: OHBDC static data (Sept. 1987), AASHTO static data (July 1987), AASHTO moving load data, OHBDC moving load data written by J. A. Puckett and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluating Concrete Bridge Deck Performance by :
Download or read book Evaluating Concrete Bridge Deck Performance written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the service life of concrete bridge decks designed by traditional procedures is often shorter than desired, their ability to withstand constant and heavy use in a variety of operating environments is of major concern. In this project, the relative performance of three bridge decks constructed with different concretes and reinforcing steel configurations was studied to help determine which deck offers the best performance over time. To achieve this objective, an array of strain and temperature instrumentation was embedded in each of the bridge decks prior to placing the deck concrete. The decks were tested under controlled live loads to characterize their structural behavior. The first set of such tests was performed immediately after the bridge decks were completed, and the second was conducted two years later. The long term performance of the three decks under environmental loads (notably, changes in temperature) was studied by continuously monitoring selected strain gages in each bridge, and by conducting periodic visual distress surveys and corrosion tests. In the data collected and analyzed from the live load tests and environmental response monitoring of the three decks, only subtle behavioral differences have been observed. While some aspects of the response have been found to statistically differ between bridges and over time, the significance of these differences remains uncertain, as the bridges are relatively young, and they only exhibit nominal signs of distress. The significance of these differences may become clear in the future, if substantial differences in deck durability and performance emerge over time. The visual distress surveys have found that the majority of the cracking that has occurred in the decks is near the integral abutments and that the Empirical deck had the most extensive cracking in this regard. The analysis presented herein generally serves as a baseline for the relative condition of the three bridges before prolonged demands from traffic and the environment. Should a follow-on project be initiated, data obtained from continued long-term monitoring and live load testing will likely provide a more complete body of evidence from which to ascertain which deck design offers superior performance. Relative to cost, initial expense for each deck was similar, thus the relative cost-to-benefit for the decks will be dependent on the service life that they offer.
Book Synopsis Evaluation of Bridge Deck Delamination Investigation Methods by : Henrique L. M. dos Reis
Download or read book Evaluation of Bridge Deck Delamination Investigation Methods written by Henrique L. M. dos Reis and published by . This book was released on 1998 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: An objective view of the relative advantages and limitations of the nondestructive testing and evaluation methods that are currently used in the inspection of bridge decks is presented and discussed. The three main nondestructive testing technologies that were evaluated are impact-echo, ground penetrating radar, and infrared thermography. Nondestructive testing and evaluation procedures, including methodology and equipment to evaluate concrete bridge decks with asphalt overlays, are also presented and discussed. Current results indicate that a combination of ground penetrating radar and infrared thermography would provide the best methodology for evaluating the structural integrity, e.g., delaminations, of concrete bridge decks with overlays. Furthermore, current results also indicate that the impact-echo method shows promising future development towards the nondestructive evaluation of bridge superstructures.
Book Synopsis Evaluating Concrete Damage in Bridge Decks with and Without Overlays Using Nondestructive Testing Procedures by : Tyler W. Robison
Download or read book Evaluating Concrete Damage in Bridge Decks with and Without Overlays Using Nondestructive Testing Procedures written by Tyler W. Robison and published by . This book was released on 2020 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The state of Wyoming alone has 13.1 million square feet of bridge deck, and evaluation of those decks has become an important part of the Wyoming Department of Transportation's (WYDOT) management of bridge repairs. The authors believe that development and advancement of nondestructive evaluation methods over the past 25 years may provide a more efficient, standardized, and accurate method for evaluating bridge deck conditions compared with current practices. A study was performed on three bridge decks in Wyoming: the First Street Bridge in Casper, the Douglas I-25 Bridge, and the Remount I-80 Bridge. For each bridge, an investigation was done using standard WYDOT practices for chain dragging. In addition, the bridges were evaluated using impact echo, thermal imaging, and ground-penetrating radar (GPR) techniques. All three methods considered were successful, and the damage locations between the impact echo, thermal imaging, and GPR generally correlated well. Based on this study, a complete bridge deck evaluation should combine impact echo with GPR testing to provide the most accurate predictions of delamination and debonding in support of optimal maintenance decisions.
Book Synopsis Evaluation of the Ontario Empirical Method for Design of Composite Bridge Deck Slab Reinforcement by : Irene K. Battaglia
Download or read book Evaluation of the Ontario Empirical Method for Design of Composite Bridge Deck Slab Reinforcement written by Irene K. Battaglia and published by . This book was released on 2012 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Overlaid Bridge Decks with Ground-penetrating Radar by : Gerardo G. Clemeña
Download or read book Evaluation of Overlaid Bridge Decks with Ground-penetrating Radar written by Gerardo G. Clemeña and published by . This book was released on 1982 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is an urgent need for methods that can be used to rapidly and nondestructively determine the condition of an old concrete deck beneath an asphaltic concrete wearing course. In recognition of this need, the technique of ground-penetrating radar was investigated. In practice, microwave-frequency impulses of about 1.1 nanosecond pulse width are transmitted into an overlaid bridge deck by a radar transducer that also serves as a receiver. When these electromagnetic pulses are directed through a delaminated concrete area, there is some pulse reflection from the deteriorated concrete, (the more severe the delamination, the more pronounced the reflection), in addition to the normal reflections at the air-asphaltic concrete and asphaltic concrete portland cement concrete interfaces and the reinforcing steel. The reflected pulses are then picked up by the transducer and transformed into the audio frequency range by a time-domain sampling technique and displayed on a facsimile graphic recorder as a pulse reflection profile. Although intended for use on overlaid bridge decks, the technique was experimentally used on three non-overlaid concrete decks and two old concrete deck slabs, in addition to three overlaid decks. To obtain 'ground truths' for comparison, conventional soundings were performed on the non-overlaid decks and slabs and two of the overlaid decks after their overlayments were removed. The results showed that ground-penetrating radar can be used successfully to detect concrete delaminations in both nonoverlaid and overlaid bridge decks, since the delaminations are manifested in the recorded radar pulse reflection profiles as recognizable irregularities in the reflection bands corresponding to the top mat of the reinforcement. These irregularities, or signatures of concrete delaminations, were often in the form of depressions, but in some instances appeared as blurs or breaks in the profiles. It was also found that the radar sometimes missed small delaminated areas of about 1 ft. (0.3 m) width and less. However, this relatively small deficiency does not impair the overall effectiveness of the technique as a nondestructive inspection tool for both types of decks. The experimental procedure can be used as is to inspect decks, if lane closure is not a major concern. However, with little further experimentation, this requirement may be completely eliminated.
Book Synopsis Bridge Deck Analysis by : Damien L. Keogh
Download or read book Bridge Deck Analysis written by Damien L. Keogh and published by CRC Press. This book was released on 2005-08-09 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive text in the field of Bridge Deck behaviour and analysis Bridge Deck Analysis is an essential reference for civil and structural engineers. It provides bridge designers with the knowledge to understand the behaviour of bridge decks, to be familiar with, and to understand the various numerical modelling techniques, to know which technique is most suited. The book covers the grillage analogy, dedicates a chapter to the modelling and analysis of integral bridge forms and also provides guidance of the application of the finite element method.
Book Synopsis Automated Bridge Deck Evaluation Using Ground Penetrating Radar Scans by : Parneet Kaur
Download or read book Automated Bridge Deck Evaluation Using Ground Penetrating Radar Scans written by Parneet Kaur and published by . This book was released on 2013 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforcement concrete (RC) bridge decks are surveyed regularly to ensure that they are safe to use and to determine if they require rehabilitation or replacement. The bridge surveys include evaluating subsurface bridge condition. RC bridges have steel reinforcement bars, also called rebars, embedded in their surface, which are prone to corrosion due to factors like moisture, carbonation, use of deicing salts and aging. By the time the effect of corroded rebars is visible on deck surface in form of cracks, the damage is tremendous. If left unchecked, corroded rebars can deteriorate at a faster and significantly affect bridge integrity. So, it is very important to timely identify and repair deteriorated rebars. Ground Penetrating Radar (GPR) is a widely used non-destructive technology (NDT) for detecting subsurface anomalies in variety of structures including RC bridges. The raw GPR data is represented as images that can be processed for obtaining a deterioration map of a bridge, which indicates the level of corrosion in rebars for the entire bridge. The existing methods to generate the deterioration map using GPR data are semi-automated, time consuming and depends on expertise of the engineer analyzing the data. In this thesis, we work towards automating the process of obtaining deterioration map of RC bridge decks based on measuring signal attenuation at the upper rebar mat using GPR. Intensity and gradient-based feature vectors were explored to construct a classifier, which can detect the regions of interest (ROI) corresponding to each rebar in images. Each classifier was tested on datasets constructed from two different bridges. Further, the exact location of rebar was found in each ROI. Once all the rebars were detected throughout the bridge, depth-correction of the measured attenuation is applied so that the component of that measured attenuation caused solely by variation in rebar depth does not skew the results. Finally, a deterioration map was generated which indicates the level of corrosion in the bridge. The proposed algorithm was tested on two RC bridges and the deteriorated regions obtained are compared with the results obtained using existing tools.
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.
