Gotowe bibliografie tematyczne / Bridges, Concrete Testing

Gotowa bibliografia na temat „Bridges, Concrete Testing”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 31 stycznia 2023

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Artykuły w czasopismach na temat "Bridges, Concrete Testing"

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Phares, B. M., T. J. Wipf i F. W. Klaiber. "Laboratory Testing of Low-Volume Road Bridge Alternative". Transportation Research Record: Journal of the Transportation Research Board 1624, nr 1 (styczeń 1998): 148–59. http://dx.doi.org/10.3141/1624-18.

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In Iowa there are over 20,000 bridges on the secondary road system. The majority of these bridges are under the jurisdiction of county engineers with limited budgets; therefore many county engineers design and construct their own short-span bridges with their own labor force. The objective of this research is to perform laboratory testing on a bridge alternative that counties can design and construct. This concept involves the fabrication of precast units composed of two steel beams connected by a thin concrete deck. The concrete deck thickness is limited so that the units can be fabricated at one location and then transported to the bridge site. The number of units required is obviously a function of the width of bridge desired. After the precast units have been connected, an additional concrete deck is placed. The concrete surface of the units is scarified so that the two layers of concrete are bonded together, thus providing the required deck thickness. Since this bridge replacement system is primarily intended for use on low-volume roads, the precast units could be constructed with new or used steel beams. The laboratory testing program consisted of a series of small-scale tests on different types of precast deck connections, “handling strength” tests of the precast units, a series of tests on the model bridge with only the precast portion of the deck in place, and a series of tests on the fully constructed model bridge. For the bridge model tested [ L = 9750 mm (32 ft), W = 6400 mm (21 ft)], five precast connectors gave the desired lateral load distribution; the addition of the cast-in-place deck significantly improved the load distribution characteristics of the bridge system. The units developed and tested result in a simple-span bridge for low-volume roads that is relatively easy to construct.
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Zhang, Jin Quan, Hong Wei Ren i Bo Yu. "Failure Testing of a Full-Scale Reinforced Concrete T-Girder Bridge". Advanced Materials Research 243-249 (maj 2011): 1767–73. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1767.

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As a common type of bridge, the reinforced concrete simply supported T-girder bridges have some usual disease problems such as web vertical cracks, incline cracks near the supports and diaphragm damage, and so on injured by transportation loads. In Shanxi province most of T-girder bridges appear to be under strength for current vehicle loads because most of which are designed by conventional methods and the old codes so it is important to evaluate how the existing damage influence the ultimate bearing capacity of the bridge. The destructive test is a directive mean of verifying the ultimate bearing capacity of bridges. This paper provides details of a destructive load test of a T-girder bridge called Zuojiabao Bridge. It describes the analysis performed prior to testing, aimed at predicting the response of the structure at both serviceability and ultimate states, and discusses the results obtained.The development rule of strain, deflection and crack and the ultimate bearing capacity of the bridge were obtained through the destructive test process. The results showthat although the old T-girder bridge has enough bearing capacity to satisfy the new vehicle standard, it is strongly recommended to strengthen or retrofit the bridge. And the finite element analysis can be effectively applied to the failure analysis of the reinforced concrete T-girder bridge subjected to destructive load.
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Knickerbocker, David J., Prodyot K. Basu, Mark A. Holloran i Edward P. Wasserman. "Recent Experience with High-Performance Concrete Jointless Bridges in Tennessee". Transportation Research Record: Journal of the Transportation Research Board 1845, nr 1 (styczeń 2003): 104–14. http://dx.doi.org/10.3141/1845-12.

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Experimental and analytical studies of two high-performance concrete (HPC) jointless bridges with integral abutments built in Tennessee as part of the FHWA’s nationwide initiative to implement HPC in bridge structures are presented. Performance of the two bridges is observed through all stages of construction and service to date, via material testing, bridge instrumentation for both short- and long-term performance monitoring, and live-load testing. The up-to-date observed performance of the bridges reveals the success of such bridge construction. Local contractors were found to be capable of producing concrete to meet increased requirements in strength and durability parameters. In addition, new insights were derived about HPC behavior in such applications, identifying the areas requiring updating of current practice. Load test data revealed that load distribution among the girders is in marked difference from codes of practice. Thermal response of the bridges indicated longitudinal flexibility offered by the jointless construction.
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Aguilar, Carlos V., David V. Jáuregui, Craig M. Newtson, Brad D. Weldon i Tamara M. Cortez. "Load Rating a Prestressed Concrete Double T-Beam Bridge without Plans by Field Testing". Transportation Research Record: Journal of the Transportation Research Board 2522, nr 1 (styczeń 2015): 90–99. http://dx.doi.org/10.3141/2522-09.

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Bridges with no design plans are an issue in New Mexico because of the many that exist throughout the state. Conventional load rating techniques cannot be used because these bridges have limited or no design documentation. This lack of information has created uncertainties regarding the load-carrying capacity of these structures. Only a few states have formal procedures on how these particular bridges should be load rated. A project was conducted for the New Mexico Department of Transportation to develop a procedure for load rating bridges without plans, including prestressed concrete bridges. In accordance with the AASHTO Manual for Bridge Evaluation, a prestressed concrete double T-beam bridge was evaluated with advanced analyses and experimental methods (including load testing and nondestructive material evaluation techniques). A four-step load rating procedure was implemented that included estimating the prestressing steel by Magnel diagrams, verifying the estimate with a rebar scanner, testing the bridge at both diagnostic and proof loads based on strain measurements, and using the proof test results to rate the bridge. Rating factors and posting loads were determined for AASHTO and New Mexico legal loads. Because of the poor condition of the shear keys (some of which were broken), it is shown that the load distribution between beams was adversely affected and the bridge should be load posted.
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Benmokrane, Brahim, Ehab El-Salakawy, Amr El-Ragaby i Sherif El-Gamal. "Performance evaluation of innovative concrete bridge deck slabs reinforced with fibre-reinforced-polymer bars". Canadian Journal of Civil Engineering 34, nr 3 (1.03.2007): 298–310. http://dx.doi.org/10.1139/l06-173.

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This paper presents the construction details, field testing, and analytical results of six innovative concrete bridges reinforced with fibre-reinforced-polymer (FRP) bars recently constructed in North America, namely Wotton, Magog, Cookshire-Eaton, Val-Alain, and Melbourne bridges in Quebec, Canada, and Morristown bridge in Vermont, USA. All six bridges are girder type, with main girders made of either steel or prestressed concrete. The main girders are supported over spans ranging from 26.2 to 50.0 m. The deck is a 200–230 mm thick concrete slab continuous over spans of 2.30–3.15 m. Different types of glass- and carbon-FRP reinforcing bars and conventional steel were used as reinforcement for the concrete deck slab. The six bridges are located on different highway categories, which means different traffic volume and environmental conditions. The bridges are well instrumented at critical locations for internal temperature and strain data collection using fibre optic sensors. These sensors are used to monitor the deck behaviour from the time of construction to several years after the completion of construction. The bridges were tested for service performance using calibrated truckloads. In parallel, a finite element analysis (FEA) was conducted and verified against the results of the field load tests. The FEA was then used to run parametric studies to investigate the effect of several important parameters such as FRP reinforcement type and ratio on the service and ultimate behaviour of these bridge decks. The analytical and field results under real service conditions, in terms of deflections, cracking, and strains in reinforcement and concrete, were comparable to those of concrete bridge deck slabs reinforced with steel.Key words: bridges deck slabs, fibre-reinforced-polymer (FRP) bars, field testing, finite element analysis.
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Buckle, I. G., A. R. Dickson i M. H. Phillips. "Ultimate strength of three reinforced concrete highway bridges". Canadian Journal of Civil Engineering 12, nr 1 (1.03.1985): 63–72. http://dx.doi.org/10.1139/l85-007.

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The destructive testing of three reinforced concrete highway bridges, recently made redundant by road realignment, is summarized. The procedure used to test the bridges to ultimate conditions is described and load capacities of about 20 times class 1 axle loads are reported for all structures. Analyses based on conventional ultimate strength theory can account for only two-thirds of these ultimate loads and then only if second order effects are included. A nonlinear finite element computer program has been developed and used to analyze one of these structures. Excellent prediction of the ultimate load is made by the program. It is therefore suggested that compressive membrane action, which is automatically modelled in the finite element solution, plays a significant role in the enhancement of load capacity.The paper concludes that a more sophisticated approach to the assessment of bridge load capacity is necessary if realistic estimates of actual strength are to be made. Limited experience with a nonlinear finite element program suggests one such approach. If used with care, some relief to the bridge replacement program can be expected. Key words: highway bridges, ultimate load capacity, finite element analysis, reinforced concrete, field testing, compressive membrane action.
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Yan, Wei Ming, Yong Li i Yan Jiang Chen. "Seismic Testing of a Long-Span Concrete Filled Steel Tubular Arch Bridge". Key Engineering Materials 456 (grudzień 2010): 89–102. http://dx.doi.org/10.4028/www.scientific.net/kem.456.89.

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Long-span bridges are always a multi-support structural system, and seismic ground motion can vary significantly over distances comparable to the length of such kind of bridges, so it’s difficult to carry out shaking table tests because of the restriction of the dimension and amount of shaking tables. This paper discusses the multiple sub-table cordwood system is used to conduct a study on the seismic testing of a three-span irregular Concrete filled steel tubular (CFST) arch bridge with the objective of investigating the dynamic performance of the bridge under spatial earthquake motions. The development and testing of the bridge model and selected experimental results are discussed then. The seismic response and response characteristics of acceleration, displacement, internal force, and strain of the structure under earthquake excitations are gained, which can provide test data and basis to evaluate the seismic performance of this CFST arch bridge or other similar structural system design.
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Jin, B., D. Liu i CK Zhu. "Experimental study on bridge vibration test". Journal of Physics: Conference Series 2158, nr 1 (1.01.2022): 012016. http://dx.doi.org/10.1088/1742-6596/2158/1/012016.

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Abstract Taking Chaihe bridge in Tieling City and Songhuajiang railway bridge on Binbei line as examples, the vibration test is carried out by using the environmental excitation method. By testing and comparing the first three typical vibration modes of the two bridges, and the experimental research shows that: A. compared with Concrete-Filled Steel Tubular Bridge, truss bridge has higher stiffness. B. The span and height of truss bridge can be higher and farther than that of Concrete-Filled Steel Tubular Bridge; C. Truss bridge is more convenient in testing, maintenance and health monitoring, and has good performance and stability.
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Ghindea, Cristian Lucian, Ionut Radu Racanel i Radu Cruciat. "Dynamic Testing of a Reinforced Concrete Road Bridge". Key Engineering Materials 601 (marzec 2014): 207–10. http://dx.doi.org/10.4028/www.scientific.net/kem.601.207.

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Considering on one hand the calculation model of the bridge, simplifying assumptions and design criteria and on the other hand the inherent differences between the project and final structure, the real structure behaviour under traffic loads can be different from that one considered in the design stage. Therefore the need of experimental tests before commissioning of bridges arises and this task is generally conditioned by complexity of the structure, the technologies used in construction and the requirements of the relevant stakeholders. The paper presents the test conditions for a reinforced concrete road bridge in Romania and the results obtained following the experimental tests. The experimentally determined dynamic characteristics of the bridge and the peek vertical accelerations are compared with those obtained by performing numerical analyses of the bridge. Due to the fact that the bridge is provided with walkways, it is appropriate to presume that the vibrations induced by road traffic will affect the pedestrians walking on the bridge. Same experimental data presented above can provide a view into how traffic induced vibrations can affect pedestrians on the bridge. For this reason, in the paper are presented the results in terms of human perception and the comparison between the resulting values and some generally accepted values
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Zoubir, Hajar, Mustapha Rguig i Mohammed Elaroussi. "Crack recognition automation in concrete bridges using Deep Convolutional Neural Networks". MATEC Web of Conferences 349 (2021): 03014. http://dx.doi.org/10.1051/matecconf/202134903014.

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Using Unmanned Aerial Systems (UASs) for bridge visual inspection automation necessitates the implementation of Deep Convolutional Neural Networks (DCNNs) to process efficiently the large amount of data collected by the UASs sensors. However, these networks require massive training datasets for the defects recognition and detection tasks. In an effort to expand existing concrete defects datasets, particularly concrete cracks in bridges, this paper proposes a public benchmark annotated image dataset containing over 6900 images of cracked and non cracked concrete bridges and culverts. The presented dataset includes some challenging surface conditions and covers concrete cracks with different sizes and patterns. The authors analyzed the proposed dataset using three state of the art DCNNs in Transfer Learning mode. The three models were used to classify the cracked and non cracked images and the best testing accuracy obtained reached 95.89%. The experimental results showcase the potential use of this dataset to train deep networks for concrete crack recognition in bridges. The dataset is publicly available at https://github.com/MCBDD-ZRE/Concrete-Bridge-Crack-Dataset- for academic purposes.
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Rozprawy doktorskie na temat "Bridges, Concrete Testing"

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Hedlund, Nadja. "Non-Destructive Testing Of Concrete Bridges". Thesis, Luleå tekniska universitet, Byggkonstruktion och brand, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-81923.

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Non-destructive testing is of great value in cases where a structure's future is investigated to find out what the best measure is. It is not always the best solution to demolish and build new. Many structures can be repaired and function several more years. In this thesis the main goal is to investigate some different non-destructive techniques and learn more about difficulties and strengths. The test subjects will be a cast T-beam in a laboratory environment as well as a case study of a railway bridge in Abisko.   The different testing equipment being used in this thesis is a covermeter, a rebound hammer and ultrasonic pulse velocity. For both the T-beam and the bridge the results are overall very good. The covermeter is proven to be both easy to use and very reliable and the ultrasonic pulse velocity was more to learn about and more difficult but is giving very good results as well.   Conclusions after the thesis project is that it requires a lot of experience of the user and time to make non-destructive testing useful and competitive in the society. Getting all the pieces together it is a powerful tool that hopefully is a sustainable asset in the future, regarding both economic and environmental issues.
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Kgoboko, Kobamelo. "Collapse behaviour of non-ductile partially prestressed concrete bridge girders". Title page, contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09EN/09enk445.pdf.

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Slapkus, Adam. "Evaluation of Georgia's high performance concerete bridge". Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/19479.

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Smolenski, Peter James. "Field instrumentation and live load testing to evaluate behaviors of three reinforced concrete bridge decks". Thesis, Montana State University, 2004. http://etd.lib.montana.edu/etd/2004/smolenski/SmolenskiP0805.pdf.

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Dupuis, Kenneth J. "Nondestructive testing of concrete box girder bridges using thermal imaging". Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Spring2008/K_Dupuis_040908.pdf.

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Sasher, William C. "Testing, assessment and FRP strengthening of concrete T-beam bridges in Pennsylvania". Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5876.

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Thesis (M.S.)--West Virginia University, 2008.
Title from document title page. Document formatted into pages; contains viii, 177 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 130-136).
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Ferdjani, Omar. "Behaviour of a one cell prestressed concrete box girder bridge : analytical study". Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66163.

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Igwemezie, Jude O. "Dynamic response and impact effects in precast, prestressed concrete bridge ties". Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74056.

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Rubin, Ariel. "Strenghtening of reinforced concrete bridge decks with carbon fiber composites". Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/19320.

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Khaled, Amar. "Behaviour of a two-cell prestressed concrete box girder bridge : analytical study". Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=64019.

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Książki na temat "Bridges, Concrete Testing"

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Woodward, R. J. Non destructive testing methods for concrete bridges. Crowthorne, Berks: Transport and Road Research Laboratory, Structures Group, Bridges Division, 1989.

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Woodward, R. J. Non destructive testing methods for concrete bridges. Crowthorne: Bridges Division, Structures Group, Transport and Road Research Laboratory, 1989.

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LaFraugh, Robert W. Concrete overlays for bridges. [Olympia, WA] (Highway Administration Bldg., Olympia 98504): Washington State Dept. of Transportation in cooperation with U.S. Dept. of Transportation, Federal Highway Administration, 1986.

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Gucunski, Nenad. Nondestructive testing to identify concrete bridge deck deterioration. Washington, D.C: Transportation Research Board, 2013.

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Brown, J. H. The performance of concrete in practice: A field study of highway bridges. Crowthorne: Transportand Road Research Laboratory, 1987.

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Guthrie, W. Spencer. Performance of concrete bridge deck surface treatments: Final report. Salt Lake City, Utah: Utah Department of Transportation, Research Division, 2005.

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Guthrie, W. Spencer. Performance of concrete bridge deck surface treatments: Final report. Salt Lake City, Utah: Utah Department of Transportation, Research Division, 2005.

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Osegueda, Roberto Alejandro. Positive moment tests for precast concrete panel-decked composite bridges. College Station, Tex: Texas Transportation Institute, Texas A&M University, 1987.

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Stanton, J. F. Load distribution and connection design for precast stemmed multibeam bridge superstructures. Washington, D.C: Transportation Research Board, National Research Council, 1986.

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Stone, W. C. Inelastic behavior of full-scale bridge columns subjected to cyclic loading. Gaithersburg, MD: U.S. Dept. of Commerce, National Institute of Standards and Technology, 1989.

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Części książek na temat "Bridges, Concrete Testing"

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Schacht, Gregor, Guido Bolle i Steffen Marx. "Load Testing of Concrete Building Constructions". W Load Testing of Bridges, 109–41. Leiden : CRC Press/Balkema, [2019] | Series: Structures and infrastructures series, ISSN 1747-7735 ; volumes 12-13: CRC Press, 2019. http://dx.doi.org/10.1201/9780429265969-4.

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Hernandez, Eli S., i John J. Myers. "Example Field Test to Load Rate a Prestressed Concrete Bridge". W Load Testing of Bridges, 181–200. Leiden : CRC Press/Balkema, [2019] | Series: Structures and infrastructures series, ISSN 1747–7735 ; volumes 12–13: CRC Press, 2019. http://dx.doi.org/10.1201/9780429265426-9.

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Jauregui, David V., Brad D. Weldon i Carlos V. Aguilar. "Load Rating of Prestressed Concrete Bridges without Design Plans by Nondestructive Field Testing". W Load Testing of Bridges, 27–65. Leiden : CRC Press/Balkema, [2019] | Series: Structures and infrastructures series, ISSN 1747-7735 ; volumes 12-13: CRC Press, 2019. http://dx.doi.org/10.1201/9780429265969-2.

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Val, Dimitri V., i Mark G. Stewart. "Determination of Remaining Service Life of Reinforced Concrete Bridge Structures in Corrosive Environments after Load Testing". W Load Testing of Bridges, 297–331. Leiden : CRC Press/Balkema, [2019] | Series: Structures and infrastructures series, ISSN 1747-7735 ; volumes 12-13: CRC Press, 2019. http://dx.doi.org/10.1201/9780429265969-10.

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Haritos, Nicholas. "Experimental modal testing of reinforced concrete bridges". W European Seismic Design Practice, 93–100. London: Routledge, 2022. http://dx.doi.org/10.1201/9780203756492-15.

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Lantsoght, E. O. L. "Assessment of existing concrete bridges by load testing". W Bridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability, 46–55. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003322641-4.

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Crawford, K. C. "Non-Destructive Testing of FRP-Structural Systems Applied to Concrete Bridges". W Nondestructive Testing of Materials and Structures, 835–40. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0723-8_119.

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Schumacher, T., C. Higgins i S. C. Lovejoy. "Acoustic Emission Monitoring of Conventionally Reinforced Concrete Highway Bridges Under Service Conditions". W Nondestructive Testing of Materials and Structures, 847–53. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0723-8_121.

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de Vries, R., E. O. L. Lantsoght, R. D. J. M. Steenbergen i S. A. A. M. Fennis. "Reliability assessment of existing reinforced concrete bridges and viaducts through proof load testing". W Bridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability, 467–75. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003322641-54.

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Nour, Omar, Osama Salem i Ahmed Mostafa. "Experimental Testing of GFRP-Reinforced Concrete Beams with Mid-Span Lap Splices Utilizing Straight- and Hooked-End Bars". W 8th International Conference on Advanced Composite Materials in Bridges and Structures, 103–10. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09409-5_12.

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Streszczenia konferencji na temat "Bridges, Concrete Testing"

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"Load Testing of Highly Skewed Concrete Bridges". W SP-323: Evaluation of Concrete Bridge Behavior through Load Testing - International Perspectives. American Concrete Institute, 2018. http://dx.doi.org/10.14359/51702432.

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"High Magnitude Loading of Concrete Bridges". W SP-323: Evaluation of Concrete Bridge Behavior through Load Testing - International Perspectives. American Concrete Institute, 2018. http://dx.doi.org/10.14359/51702439.

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"Post-Tensioned Repair and Field Testing of a Prestressed Concrete Box Beam Bridge". W SP-120: External Prestressing in Bridges. American Concrete Institute, 1990. http://dx.doi.org/10.14359/3437.

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""Diagnostic Load Testing of Concrete Bridges, Principles and Example "". W SP-323: Evaluation of Concrete Bridge Behavior through Load Testing - International Perspectives. American Concrete Institute, 2018. http://dx.doi.org/10.14359/51702437.

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"Inelastic Shear Distribution in Prestressed Concrete Girder Bridges". W SP-342: Advanced Analysis and Testing Methods for Concrete Bridge Evaluation and Design. American Concrete Institute, 2020. http://dx.doi.org/10.14359/51725934.

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Bajaj, Mayank, i Biswajit Bhattacharjee. "Residual service life estimation of bridges". W IABSE Congress, Christchurch 2021: Resilient technologies for sustainable infrastructure. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/christchurch.2021.0984.

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<p>While concrete structures perform well in many situations, lack of durability has emerged as a significant issue for asset owners. A review of past bridge failures was done to identify the most probable causes of bridge failures. This study has tended to focus on current models used for estimating the time to deterioration of concrete bridges instigated by Chloride ingress and Fatigue. Subsequently, mathematical modelling of the best-suited deterioration model is done to arrive at the residual life of two existing bridges. This work has highlighted high variability in the parameters used to describe the durability related properties of in-situ aged concrete. A realistic residual life assessment can be achieved by correct evaluation of these parameters by periodic testing of bridge samples</p>
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"Rating of Prestressed Concrete Adjacent Beam Bridges without Plans". W SP-323: Evaluation of Concrete Bridge Behavior through Load Testing - International Perspectives. American Concrete Institute, 2018. http://dx.doi.org/10.14359/51702435.

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Küttenbaum, Stefan, Stefan Maack, Alexander Taffe i Thomas Braml. "Non-destructive testing in civil engineering:". W IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/guimaraes.2019.1132.

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<p>The reassessment of bridges is becoming increasingly important. The basic requirement for analyses of structural safety is reliable knowledge about individual structures. This paper introduces the new approach to evaluate the quality of measured data gained from non-destructive testing (NDT) to provide reliable, objective, and relevant information about existing bridges. The purpose is to relate this validated knowledge to probabilistic analyses. Bridging the gap between NDT and numerical reassessments indicates reduced numerical uncertainties and residual service time extensions. This paper deals with an application of this approach using measurement data collected by ultrasonic technique at a prestressed concrete bridge.</p>
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"Estimation of Steel Rebar Strength in Existing Concrete Bridges". W SP-342: Advanced Analysis and Testing Methods for Concrete Bridge Evaluation and Design. American Concrete Institute, 2020. http://dx.doi.org/10.14359/51725939.

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Lantsoght, Eva, Cor van der Veen, Dick Hordijk i Ane de Boer. "Recommendations for proof load testing of reinforced concrete slab bridges". W IABSE Symposium, Vancouver 2017: Engineering the Future. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2017. http://dx.doi.org/10.2749/vancouver.2017.0346.

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Raporty organizacyjne na temat "Bridges, Concrete Testing"

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Wang, Yao, Mirela D. Tumbeva i Ashley P. Thrall. Evaluating Reserve Strength of Girder Bridges Due to Bridge Rail Load Shedding. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317308.

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This research experimentally and numerically evaluated the reserve strength of girder bridges due to bridge rail load shedding. The investigation included: (1) performing non-destructive field testing on two steel girder bridges and one prestressed concrete girder bridge, (2) developing validated finite element numerical models, and (3) performing parametric numerical investigations using the validated numerical modeling approach. Measured data indicated that intact, integral, reinforced concrete rails participate in carrying live load. Research results culminated in recommendations to evaluate the reserve strength of girder bridges due to the participation of the rail, as well as recommendations for bridge inspectors for evaluating steel girder bridges subjected to vehicular collision.
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Peterman, Robert, i J. Ramirez. Testing of Multi-Span Bridges with Full Span Precast Prestressed Concrete Panels (Phase 1). West Lafayette, IN: Purdue University, 1997. http://dx.doi.org/10.5703/1288284313327.

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Weiss, W. Jason, Chunyu Qiao, Burkan Isgor i Jan Olek. Implementing Rapid Durability Measure for Concrete Using Resistivity and Formation Factor. Purdue University, 2020. http://dx.doi.org/10.5703/1288284317120.

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The durability of in-place concrete is a high priority issue for concrete pavements and bridges. Several studies have been conducted by INDOT to use electrical resistivity as a measure of fluid transport properties. Resistivity is dependent on the chemistry of the cement and supplementary cementitious system used, as such it has been recommended that rather than specifying resistivity it may be more general to specify the formation factor. Samples were tested to establish the current levels of performance for concrete pavements in the state of Indiana. Temperature and moisture corrections are presented and acceptable accelerated aging procedure is presented. A standardized testing procedure was developed (AASHTO TP 119–Option A) resulting in part from this study that provides specific sample conditioning approaches to address pore solution composition, moisture conditioning, and testing procedures. An accelerated aging procedure is discussed to obtain later age properties (91 days) after only 28 days.
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Deb, Robin, Paramita Mondal i Ardavan Ardeshirilajimi. Bridge Decks: Mitigation of Cracking and Increased Durability—Materials Solution (Phase III). Illinois Center for Transportation, grudzień 2020. http://dx.doi.org/10.36501/0197-9191/20-023.

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Type K cement offers a lower slump than conventional concrete, even at a higher water-to-cement ratio. Therefore, a suitable chemical admixture should be added to the Type K concrete mix design at a feasible dosage to achieve and retain target slump. In this project, a compatibility study was performed for Type K concrete with commercially available water-reducing and air-entraining admixtures. Slump and air content losses were measured over a period of 60 minutes after mixing and a particular mid-range water-reducing admixture was found to retain slump effectively. Furthermore, no significant difference in admixture interaction between conventional and Type K concrete was observed. Another concern regarding the use of Type K concrete is that its higher water-to-cement ratio can potentially lead to higher permeability and durability issues. This study also explored the effectiveness of presoaked lightweight aggregates in providing extra water for Type K hydration without increasing the water-to-cement ratio. Permeability of concrete was measured to validate that the use of presoaked lightweight aggregates can lower water adsorption in Type K concrete, enhancing its durability. Extensive data analysis was performed to link the small-scale material test results with a structural test performed at Saint Louis University. A consistent relation was established in most cases, validating the effectiveness of both testing methods in understanding the performance of proposed shrinkage-mitigation strategies. Stress analysis was performed to rank the mitigation strategies. Type K incorporation is reported to be the most effective method for shrinkage-related crack mitigation among the mixes tested in this study. The second-best choice is the use of Type K in combination with either presoaked lightweight aggregates or shrinkage-reducing admixtures. All mitigation strategies tested in this work were proved to be significantly better than using no mitigation strategy.
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Taylor, Benjamin, Yu Qiao, Mark Bowman i Samuel Labi. The Economic Impact of Implementing Nondestructive Testing of Reinforced Concrete Bridge Decks in Indiana. Purdue University, czerwiec 2017. http://dx.doi.org/10.5703/1288284316343.

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