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Artykuły w czasopismach na temat „Bridges, Concrete Testing”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 31 stycznia 2023

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1

Phares, B. M., T. J. Wipf, and F. W. Klaiber. "Laboratory Testing of Low-Volume Road Bridge Alternative." Transportation Research Record: Journal of the Transportation Research Board 1624, no. 1 (January 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

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2

Zhang, Jin Quan, Hong Wei Ren, and Bo Yu. "Failure Testing of a Full-Scale Reinforced Concrete T-Girder Bridge." Advanced Materials Research 243-249 (May 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 be

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3

Knickerbocker, David J., Prodyot K. Basu, Mark A. Holloran, and Edward P. Wasserman. "Recent Experience with High-Performance Concrete Jointless Bridges in Tennessee." Transportation Research Record: Journal of the Transportation Research Board 1845, no. 1 (January 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

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4

Aguilar, Carlos V., David V. Jáuregui, Craig M. Newtson, Brad D. Weldon, and 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, no. 1 (January 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.

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Benmokrane, Brahim, Ehab El-Salakawy, Amr El-Ragaby, and Sherif El-Gamal. "Performance evaluation of innovative concrete bridge deck slabs reinforced with fibre-reinforced-polymer bars." Canadian Journal of Civil Engineering 34, no. 3 (March 1, 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

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6

Buckle, I. G., A. R. Dickson, and M. H. Phillips. "Ultimate strength of three reinforced concrete highway bridges." Canadian Journal of Civil Engineering 12, no. 1 (March 1, 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 ultim

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7

Yan, Wei Ming, Yong Li, and Yan Jiang Chen. "Seismic Testing of a Long-Span Concrete Filled Steel Tubular Arch Bridge." Key Engineering Materials 456 (December 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

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8

Jin, B., D. Liu, and CK Zhu. "Experimental study on bridge vibration test." Journal of Physics: Conference Series 2158, no. 1 (January 1, 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,

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9

Ghindea, Cristian Lucian, Ionut Radu Racanel, and Radu Cruciat. "Dynamic Testing of a Reinforced Concrete Road Bridge." Key Engineering Materials 601 (March 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

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10

Zoubir, Hajar, Mustapha Rguig, and 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 presen

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11

Al-Mahaidi, Riadh, Geoff Taplin, and Armando Giufre. "Load Distribution and Shear Strength Evaluation of an Old Concrete T-Beam Bridge." Transportation Research Record: Journal of the Transportation Research Board 1696, no. 1 (January 2000): 52–62. http://dx.doi.org/10.3141/1696-08.

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There are about 330 T-beam bridges in the Australian state of Victoria that were built before 1950. Australia-wide there are nearly 1,000 of these early T-beam bridges. The shear capacity of these bridges, when assessed in accordance with current codes of practice, is in some cases not adequate for the current design loading. In 1996, VicRoads, the Victorian state road authority, initiated a project to enable a more accurate assessment of the shear capacity of these bridges to be made so that decisions on load rating or replacement could be made. An analysis of an existing reinforced concrete

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12

Russo, Francesco M., Terry J. Wipf, and F. Wayne Klaiber. "Diagnostic Load Tests of a Prestressed Concrete Bridge Damaged by Overheight Vehicle Impact." Transportation Research Record: Journal of the Transportation Research Board 1696, no. 1 (January 2000): 103–10. http://dx.doi.org/10.3141/1696-50.

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A series of diagnostic load tests performed on two prestressed concrete bridges located in western Iowa are discussed. The bridges are dual prestressed concrete I-beam structures. In June 1996, an overheight vehicle struck the westbound structure and caused significant loss of section and cracking. As a result of the severity of the damage and because of concerns about the remaining capacity and long-term durability of the damaged beams, the Iowa Department of Transportation decided to remove the two most severely damaged beams. The diagnostic load-testing portion of the research program consi

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13

Alkhrdaji, Tarek, Antonio Nanni, and Randy Mayo. "Upgrading Missouri Transportation Infrastructure: Solid Reinforced-Concrete Decks Strengthened with Fiber-Reinforced Polymer Systems." Transportation Research Record: Journal of the Transportation Research Board 1740, no. 1 (January 2000): 157–63. http://dx.doi.org/10.3141/1740-20.

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More than 40 percent of the bridges in the United States need repair, strengthening, or replacement. Because of limited funds, many states are forced to post load restrictions on their bridges as a temporary measure. Recently, fiber-reinforced polymers (FRPs) have emerged as a practical solution for repair or strengthening of highway bridges. Since there are no nationally accepted specifications for design and construction with bonded FRP reinforcement, the Missouri Department of Transportation (MoDOT) has funded a research program aimed at validating the design and analysis procedure through

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14

Zhang, Li Hai, Maizuar Maizuar, Priyan Mendis, Colin Duffield, and Russell Thompson. "Monitoring the Dynamic Behaviour of Concrete Bridges Using Non-Contact Sensors (IBIS-S)." Applied Mechanics and Materials 846 (July 2016): 225–30. http://dx.doi.org/10.4028/www.scientific.net/amm.846.225.

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The maintenance and operation of bridges represent a significant investment in both the public and private domains. In practice, the structural damage of a bridge that accumulates over its life-span is a result of continuous degradation caused mainly by traffic conditions and sudden extreme events (e.g. flooding, fires and severe traffic accidents). However, under heavy truck loading, the deterioration rate of a bridge can be accelerated. As the use of heavier articulated trucks becomes increasingly popular in contemporary freight transportation systems, the development of modern Non-Destructi

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15

Miller, R., B. Shahrooz, T. M. Baseheart, E. Long, J. Jones, R. Knarr, and R. Sprague. "Testing of High-Performance Concrete Single-Span Box Girder." Transportation Research Record: Journal of the Transportation Research Board 1624, no. 1 (January 1998): 118–24. http://dx.doi.org/10.3141/1624-14.

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As part of a multistate research program on use of high-performance concrete (HPC) in highway bridges, a bridge originally designed as a three-span adjacent box girder bridge was converted to a single-span bridge by using 70-MPa HPC and 15-mm strands. As part of the research, a test beam was constructed and tested. Instruments placed in the beam before casting were used to measure transfer length, which was found to be approximately 1.22 m, larger than the 50-bar diameters usually used in the American Association of State Highway and Transportation Officials (AASHTO) Standard Specifications bu

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16

Das, P. C., J. S. Owen, B. J. Eccles, M. A. Woodings, and B. S. Choo. "Role of Dynamic Testing in Assessment of Bridges." Transportation Research Record: Journal of the Transportation Research Board 1594, no. 1 (January 1997): 115–24. http://dx.doi.org/10.3141/1594-12.

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Six reinforced concrete beams were loaded incrementally up to failure. After each increment the load was removed and measurements of the modal properties of the beams were made by impulse testing. The variation of the natural frequencies, frequency ratios, mode shapes, and the level of damage were investigated. It was found that on completion of the tests the natural frequencies of the beams had been reduced by an average of 25 percent in each mode. However, changes in mode shape were very small, and appreciable differences were only observed when the damage was highly localized. Modeling of t

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17

Hillebrand, Matthias, and Josef Hegger. "Fatigue Testing of Shear Reinforcement in Prestressed Concrete T-Beams of Bridges." Applied Sciences 10, no. 16 (August 11, 2020): 5560. http://dx.doi.org/10.3390/app10165560.

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In the recent years, bridges, as an important part of the national and international infrastructure, had to comply with stricter requirements due to increased heavy load traffic. Many of these bridge structures built in the 1960s and 1970s often contain less web reinforcement than the modern required minimum web reinforcement. In this context, the shear resistance under cyclic loading is of special interest. For this reason, experimental tests were conducted on prestressed concrete beams with and without shear reinforcement at the Institute of Structural Concrete of RWTH Aachen University to i

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18

Zhao, Fu Li, Yi Qiang Xiang, and Qiang Qiang Wu. "Research on Monitoring and Control for Suspender Cable Tension of Half-Through Concrete Filled Steel Tube Arch Bridge." Advanced Materials Research 859 (December 2013): 131–34. http://dx.doi.org/10.4028/www.scientific.net/amr.859.131.

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The measurement accuracy of the cable tensions in the hanger rods of concrete filled steel tube arch bridges is important for the correct evaluation of bridges condition. Based on Jinpan Bridge-a half through concrete filled steel tube arch bridge with 80 m span in Tiantai, it was put forward the vibration frequency method for testing and evaluate suspender tensions with the help of analysis vibration characters of the suspender. The precision of cable force calculation formula was verified after comparing the practical tension with the designed tension obtained from tension jack method. Then,

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19

Li, Yan, Xiaolong Ma, and Wei Zhang. "Dynamic performance of a concrete-filled steel tube high-pier curved continuous truss girder bridge due to moving vehicles." Advances in Structural Engineering 22, no. 6 (November 23, 2018): 1297–311. http://dx.doi.org/10.1177/1369433218811539.

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The dynamic performance of a new type of concrete-filled steel tube high-pier curved continuous truss girder bridges under moving vehicles is studied combining field testing and numerical simulation method by an actual bridge example. The dynamic response data were obtained before opening to traffic for the bridge under moving testing vehicles. A three-dimensional vehicle and bridge coupled vibration analysis model for curved bridges is proposed and validated. The dynamic behavior characteristics and vehicular ride comfort for this new type bridge are studied considering variable road surface

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20

Tajalli, S. M. A., and S. R. Rigden. "Partially and non-destructive testing of 40 concrete bridges." Proceedings of the Institution of Civil Engineers - Structures and Buildings 140, no. 1 (February 2000): 25–38. http://dx.doi.org/10.1680/stbu.2000.140.1.25.

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21

Wipf, Terry J., F. Wayne Klaiber, J. Scott Ingersoll, and Douglas L. Wood. "Field and Laboratory Testing of Precast Concrete Channel Bridges." Transportation Research Record: Journal of the Transportation Research Board 1976, no. 1 (January 2006): 88–94. http://dx.doi.org/10.1177/0361198106197600110.

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Wahab, M. M. Abdel, and G. De Roeck. "Dynamic Testing of Prestressed Concrete Bridges and Numerical Verification." Journal of Bridge Engineering 3, no. 4 (November 1998): 159–69. http://dx.doi.org/10.1061/(asce)1084-0702(1998)3:4(159).

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23

Leng, Yanling, Jinquan Zhang, Ruinian Jiang, and Yangjian Xiao. "Structural Redundancy Assessment of Adjacent Precast Concrete Box-Beam Bridges in Service." Advances in Materials Science and Engineering 2020 (February 15, 2020): 1–10. http://dx.doi.org/10.1155/2020/5801841.

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Present approaches for assessing bridge redundancy are mainly based on nonlinear finite element (FE) analysis. Unfortunately, the real behavior of bridges in the nonlinear range is difficult to evaluate and a sound basis for the nonlinear FE analysis is not available. In addition, a nonlinear FE analysis is not feasible for practitioners to use. To tackle this problem, a new simplified approach based on linear FE analysis and field load testing is introduced in this paper to address the particular structural feature and topology of adjacent precast concrete box-beam bridges for the assessment

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24

Cho, Doo Yong, Sun Kyu Park, and Woo Seok Kim. "Live Load Distribution in Prestressed Concrete Girder Bridges with Curved Slab." Applied Mechanics and Materials 284-287 (January 2013): 1441–45. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.1441.

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This paper presents the live load distribution in straight prestressed concrete (PSC) girder bridges with curved deck slab utilizing finite element analyses. Numerical modeling methodology was established and calibrated based on field testing results. A parametric study of 73 cases with varying 6 critical parameters was used to determine a trend over each parameter. Through live load girder distribution factor (GDF) comparisons between the AASHTO LRFD, AASHTO Standard factors and finite element analyses results, both AASHTO live load distribution predicted conservatively in most bridges consid

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25

Andersson, Louise, Johan Silfwerbrand, Anders Selander, and Jan Trägårdh. "Effect of High-Pressure Washing on Chloride Ingress in Concrete – Development of an Accelerated Test Method." Nordic Concrete Research 67, no. 2 (December 1, 2022): 35–50. http://dx.doi.org/10.2478/ncr-2022-0013.

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Abstract Bridges constitute an important part of the infrastructure. For bridges to have the longest possible service life with minimum repairs, the maintenance is of great importance. One type of bridge maintenance that is rarely researched is the continuous preventive maintenance. The continuous preventive maintenance consists of removal of vegetation, cleaning of bridge joints and drainage systems as well as high-pressure washing of the structure. The effect of washing is discussed but not properly researched. A study on the effectiveness of high-pressure washing on concrete is therefore be

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Sainz-Aja, Jose, Carlos Thomas, Juan A. Polanco, and Isidro Carrascal. "High-Frequency Fatigue Testing of Recycled Aggregate Concrete." Applied Sciences 10, no. 1 (December 18, 2019): 10. http://dx.doi.org/10.3390/app10010010.

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Concrete fatigue behaviour has not been extensively studied, in part because of the difficulty and cost. Some concrete elements subjected to this type of load include the railway superstructure of sleepers or slab track, bridges for both road and rail traffic and the foundations of wind turbine towers or offshore structures. In order to address fatigue problems, a methodology was proposed that reduces the lengthy testing time and high cost by increasing the test frequency up to the resonance frequency of the set formed by the specimen and the test machine. After comparing this test method with

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27

Patil, Mayur V., and Dr S. R. Parekar. "Nonlinear Analysis of External Post-Tensioning anchorage of Concrete Segment." International Journal for Research in Applied Science and Engineering Technology 11, no. 1 (January 31, 2023): 1010–20. http://dx.doi.org/10.22214/ijraset.2023.48754.

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Abstract: Precast concrete segmental bridges (PCSBs) have been the most common design technology used in the last decades. In these studies Non-linear structural performances of externally prestressed, precast concrete segmental bridges (PCSB). PCSBs with externally prestressed tendons have become very popular in construction because of economical and safety reasons, fast and practical construction, and outstanding serviceability. External tendons technique is widely used because it allows to inspect the cables and to replace them or to reinforce the tendons in case of damage while such kinds

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Bakht, Baidar, and Akhilesh C. Agarwal. "Deck slabs of skew girder bridges." Canadian Journal of Civil Engineering 22, no. 3 (June 1, 1995): 514–23. http://dx.doi.org/10.1139/l95-060.

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Canadian codes allow the design of concrete deck slabs of slab-on-girder bridges by taking account of the internal arching action that develops in these slabs under concentrated wheel loads in particular. Provided that certain prescribed conditions are met, a deck slab is deemed to have met the design criteria if it is provided with a top and a bottom layer of steel reinforcement with each layer consisting of an orthogonal mesh of steel bars in which the area of cross section of the bars in each direction is at least 0.3% of the effective area of cross section of the deck slab. For deck slabs

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Sun, Hang, Da Peng Chen, and Ying Ping Wu. "Evaluation and Study on the Bearing Capacity of Deck Type Concrete Arch Bridge." Key Engineering Materials 648 (June 2015): 72–79. http://dx.doi.org/10.4028/www.scientific.net/kem.648.72.

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As more and more arch bridges built with the construction method of cantilever erection, the strength and entirety of the bridge shall worry the designers. This paper studies an arch bridge with a 65-meter span, gives the static loading test plan and the dynamic test plan, analyzes the testing data of the displacement and strain, explains the methods of static and dynamic load test in detail, and gives a conclusion about the bearing capacity and dynamic properties of bridge. This can be referred by the similar bridge.

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Omar, Tarek, and Moncef Nehdi. "Condition Assessment of Reinforced Concrete Bridges: Current Practice and Research Challenges." Infrastructures 3, no. 3 (September 14, 2018): 36. http://dx.doi.org/10.3390/infrastructures3030036.

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One quarter of bridges in Canada and the United States need repair. The present study provides a critical overview of the state-of-the-art existing condition assessment techniques for reinforced concrete bridges, with an emphasis on current practice in North America. The techniques were classified into five categories, including visual inspection, load testing, non-destructive evaluation, structural health monitoring, and finite element modelling. The potential applications of these technologies are discussed and compared, highlighting their primary advantages and limitations. The review revea

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31

Doran, D. "Discussion: Partially and non-destructive testing of 40 concrete bridges." Proceedings of the Institution of Civil Engineers - Structures and Buildings 152, no. 1 (February 2002): 90. http://dx.doi.org/10.1680/stbu.2002.152.1.90.

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Tajalli, S. M. A., S. R. Rigden, and D. Doran. "Discussion: Partially and non-destructive testing of 40 concrete bridges." Proceedings of the Institution of Civil Engineers - Structures and Buildings 152, no. 3 (August 2002): 295. http://dx.doi.org/10.1680/stbu.2002.152.3.295.

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Lantsoght, Eva O. L., Cor van der Veen, Ane de Boer, and Dick A. Hordijk. "State-of-the-art on load testing of concrete bridges." Engineering Structures 150 (November 2017): 231–41. http://dx.doi.org/10.1016/j.engstruct.2017.07.050.

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Innocenzi, Raoul Davide, Vanni Nicoletti, Davide Arezzo, Sandro Carbonari, Fabrizio Gara, and Luigino Dezi. "A Good Practice for the Proof Testing of Cable-Stayed Bridges." Applied Sciences 12, no. 7 (March 31, 2022): 3547. http://dx.doi.org/10.3390/app12073547.

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This paper presents the results and interpretations of static and dynamic tests that were executed on a newly built cable-stayed steel-concrete composite bridge during the final proof testing. A brief description of the structure, the testing methodology, and the used instrumentation are presented. Then, the test results are widely discussed and interpreted in order to evaluate the bridge performance during the proof test and also to understand the usefulness of each performed test in a proof test framework. All the collected experimental data are also compared to the numerical ones that were

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N.S. Ngo, T. Pape, R.P. Kotze, and R.W. Pritchard. "Load Testing and In-service Monitoring of Transversely Stressed Deck Unit Bridges." Electronic Journal of Structural Engineering 14, no. 1 (January 1, 2015): 85–96. http://dx.doi.org/10.56748/ejse.141911.

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Transversely stressed precast concrete deck unit bridges are a common type of small and medium span bridge on the Queensland road network. This type of bridge is unique in design featuring transverse posttensioned stressing bars with a low level of prestressing, stiff upright kerb units and no shear keys. Recent structural assessments of these bridge types has yielded varied and at times inconsistent results, with theoretical structural deficiencies identified at odds with the lack of evidence of structural distress, demonstrating acceptable performance. A test program was developed to address

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Savino, Pierclaudio, Francesco Tondolo, Donato Sabia, Antonino Quattrone, Fabio Biondini, Gianpaolo Rosati, Mattia Anghileri, and Bernardino Chiaia. "Large-Scale Experimental Static Testing on 50-Year-Old Prestressed Concrete Bridge Girders." Applied Sciences 13, no. 2 (January 7, 2023): 834. http://dx.doi.org/10.3390/app13020834.

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The heritage of existing road infrastructures and in particular of bridges consists of structures that are approaching or exceeding their designed service life. Detrimental causes such as aging, fatigue and deterioration processes other than variation in loading conditions introduce uncertainties that make structural assessment a challenging task. Experimental data on their performances are crucial for a proper calibration of numerical models able to predict their behavior and life-cycle structural performance. In this scenario, an experimental research program was established with the aim of

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37

Hu, Chun Hua, Qiao Zhu, Xiao Zhou Ma, and Fang Yu. "Preliminary Investigation of Influence of Special Testing on Bridge Structure Durability." Advanced Materials Research 1065-1069 (December 2014): 889–93. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.889.

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Based on bridges routine examination, special detection is in-depth and meticulous testing that according to the disease characteristics, using some expertise technology and testing equipment for steel corrosion, concrete carbonization, the thickness of the protective layer and component quality to some key parts or typical bridge opening. Bridge condition of technology can be controlled more fully and accurately through a special bridge inspection, combined with conventional test results on the status of a comprehensive assessment of structures. This may provide technical data for the next br

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CAI, C. S., M. ARAUJO, A. NAIR, and X. SHI. "STATIC AND DYNAMIC PERFORMANCE EVALUATION OF A PRE-STRESSED CONCRETE BRIDGE THROUGH FIELD TESTING AND MONITORING." International Journal of Structural Stability and Dynamics 09, no. 04 (December 2009): 711–28. http://dx.doi.org/10.1142/s0219455409003259.

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This paper presents field tests performed on a slab-on-girder pre-stressed concrete bridge. The bridge was tested under static loading, crawling loading, and dynamic loading. A full three-dimensional finite element prediction under both static and dynamic loadings was carried out and the results were compared with the field measurements. While acoustic emission (AE) monitoring of bridge structures is not a new vista, the method has not been fully exploited in bridge monitoring. Though numerous quantitative methods have been proposed, they have not yet developed to be useful for actual field te

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Wang, Yu Qian, Shou Shan Cheng, Wan Heng Li, and Yi Li. "Investigation on the Index System for Durability of Concrete Bridges in Codes." Applied Mechanics and Materials 94-96 (September 2011): 1577–82. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.1577.

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This article surveys and studies the design, construction and verification codes related to durability of concrete bridges both home and abroad, contrastively analyzes their requirements on environmental effect, durability design, construction and testing indices, and finally brings up the durability index system suitable for Chinese concrete bridges which covers the four hierarchies of environment, material, components and structure, and also considers the three phases of design, construction and verification.

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Wang, Zhi Feng, Xian Yan Zhou, and Da Hai Zhang. "Structural Condition Evaluation of an In-Service Glued-Laminated Timber Bridge Based on the Dynamic and Static Testing." Applied Mechanics and Materials 847 (July 2016): 31–37. http://dx.doi.org/10.4028/www.scientific.net/amm.847.31.

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The structural use of wood has increased steadily in recent times, including a renewed interest in the use of timber as a bridge material. As the only environment-friendly and resource-saving building material, wood has been gradually uesd for short and medium span bridges in China. In 2014, The domestic largest single-span glued-laminated timber (glulam) deck arch bridge crossing a freeway was completed and put into operation in Zhangjiajie City, central China' Hunan province. In order to know the bearing capacity of superstructures and assess its working conditions, in-site static and dynami

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Flores, Elsy Y., Jordan Varbel, Craig M. Newtson, and Brad D. Weldon. "Ultra-High-Performance Concrete Shear Keys in Concrete Bridge Superstructures." MATEC Web of Conferences 271 (2019): 07006. http://dx.doi.org/10.1051/matecconf/201927107006.

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Many existing bridges have adjacent girders that utilize grouted shear keys to transfer loads laterally across the superstructure. Cracking and leaking often cause degradation of the shear key and the girder. This work investigates the potential for using non-proprietary ultra-high performance concrete (UHPC) as a grouting material for repair of deteriorated shear keys by testing bond strength between UHPC and substrate concrete surfaces that were either formed or scarified by chipping. Bond strengths were adequate for both surface textures even though texture depth was substantially less than

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Hao, Bao Hong, Ding Zeng, Quan Yong Deng, Xi Yang Song, and Tin Tin Zhou. "Concrete Reinforcement Corrosion Characteristics and Grading Evaluation under Natural Conditions." Advanced Materials Research 1030-1032 (September 2014): 744–49. http://dx.doi.org/10.4028/www.scientific.net/amr.1030-1032.744.

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Abstract: The paper, by using various electrochemical methods, conducts non-destructive quantitative testing towards currently-used bridges, analyzes reinforcement corrosion characteristics under natural environment, concludes the influencing rule of natural environment on reinforcement corrosion, and reveals differences accelerated simulation environment by contrasting with preliminary laboratory results. The real bridge measurement results show that: weight loss ratio of reinforcement under humid environment can reach a maximum of 33% and a minimum of 18%; while weight loss ratio of reinforc

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Cheng, Yong Chun, Hong Bin Guo, Xian Qiang Wang, and Yu Bo Jiao. "Durability Assessment of Reinforced Concrete Bridge Based on Fuzzy Neural Networks." Advanced Materials Research 838-841 (November 2013): 1069–72. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.1069.

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In the operation process of bridge structures, some bridges appear early failure without reaching design reference period due to the influences of external environment, vehicle load and other factors. Therefore, the problem of structure durability is very obvious. In this paper, a new durability assessment method is proposed based on fuzzy neural networks, which can take account of the defects and deficiencies of existing durability assessment methods. The simulation for learning and testing samples indicates that the proposed method possesses good learning ability and predictive analysis abil

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Varela-Ortiz, Wilmel, Carmen Y. Lugo Cintrón, Gerardo I. Velázquez, and Terry R. Stanton. "Load testing and GPR assessment for concrete bridges on military installations." Construction and Building Materials 38 (January 2013): 1255–69. http://dx.doi.org/10.1016/j.conbuildmat.2010.09.044.

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Lantsoght, Eva, Cor van der Veen, Ane de Boer, and Dick A. Hordijk. "Proof load testing of reinforced concrete slab bridges in the Netherlands." Structural Concrete 18, no. 4 (March 21, 2017): 597–606. http://dx.doi.org/10.1002/suco.201600171.

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Haynes, Matthew A., Erdem Coleri, and Shashwath Sreedhar. "Impermeable Asphalt Concrete Layer to Protect and Seal Concrete Bridge Decks." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 6 (April 18, 2019): 355–67. http://dx.doi.org/10.1177/0361198119841041.

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Deterioration of the concrete bridge deck is one of the most significant problems affecting the service life of bridges in the United States (U.S.). The early failure of asphalt pavement overlays on concrete bridge decks with spray-on waterproofing membranes has been recognized as a significant issue by the Oregon Department of Transportation (ODOT). Potential reasons for the failure of the asphalt overlays were thought to be the poor adhesion between the waterproofing membrane and the asphalt-wearing course, and the material properties of the asphalt layer. Moisture penetration into the aspha

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Ventura, C. E., A. J. Felber, and S. F. Stiemer. "Determination of the dynamic characteristics of the Colquitz River Bridge by full-scale testing." Canadian Journal of Civil Engineering 23, no. 2 (April 1, 1996): 536–48. http://dx.doi.org/10.1139/l96-058.

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This paper presents the results of full-scale tests performed at the Colquitz River Bridge near Victoria, British Columbia (B.C.), Canada, during September 1992 to determine the dynamic characteristics of the structure. The five-span bridge was completed in 1954 and is part of the Trans-Canada Highway. It is 82.68 m long and 11.89 m wide, and has six continuous steel girders supporting a 175 mm thick concrete deck. This particular bridge was chosen for testing because of its typical nature of many B.C. bridges, its location in an area of high seismic risk, and its excellent site accessibility.

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Yang, Yi Xi. "Study on Tensile Strains in Concrete Bridge Girders." Applied Mechanics and Materials 336-338 (July 2013): 309–12. http://dx.doi.org/10.4028/www.scientific.net/amm.336-338.309.

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In this paper, we present the design and testing of a simple yet accurate transducer for measuring strain in reinforced concrete bridges. Lessons learned from two earlier versions of the transducer, the first of which was incorporated into the design constraints and criteria. The following sections present the transducer design process, review the calibration and lab testing of the transducer prototype, and summarize the transducer performance in the field.

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Novak, Josef, and Alena Kohoutkova. "Optimization of Pretensioned Steel Fiber Reinforced Concrete Beam." Advanced Materials Research 1106 (June 2015): 94–97. http://dx.doi.org/10.4028/www.scientific.net/amr.1106.94.

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Pretensioned concrete beams are used as a main load bearing member for composite bridges with a span to 30 m. The advantage of longitudinal prefabrication technology of beams for small span bridges is quick installation, savings of straight supporting scaffolding of centers and formwork. The amount of labour with formwork, reinforcement and concrete including work with scaffolding of centers on site is reduced at a minimum. During searching applications of steel fiber reinforced concrete (SFRC) suitable for this kind of structure a pretensioned concrete beam suitable for a bridge bay with a sp

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Haritos, Nicholas, Anil Hira, Priyan Mendis, Rob Heywood, and Armando Giufre. "Load Testing to Collapse Limit State of Barr Creek Bridge." Transportation Research Record: Journal of the Transportation Research Board 1696, no. 1 (January 2000): 92–102. http://dx.doi.org/10.3141/1696-49.

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VicRoads, the road authority for the state of Victoria, Australia, has been undertaking extensive research into the load capacity and performance of cast-in-place reinforced concrete flat slab bridges. One of the key objectives of this research is the development of analytical tools that can be used to better determine the performance of these bridges under loadings to the elastic limit and subsequently to failure. The 59-year-old Barr Creek Bridge, a flat slab bridge of four short continuous spans over column piers, was made available to VicRoads in aid of this research. The static testing pr

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