Relevant bibliographies by topics / Concrete bridges – Testing; Concrete – Fatigue

Academic literature on the topic 'Concrete bridges – Testing; Concrete – Fatigue'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Concrete bridges – Testing; Concrete – Fatigue"

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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 conventional frequency tests, it was found that tests performed at a high frequency (90 ± 5 Hz) were more conservative than those performed at a moderate frequency (10 Hz); this effect was magnified in those concretes with recycled aggregates coming from crushed concrete (RC-S). In addition, it was found that the resonance frequency of the specimen–test machine set was a parameter capable of identifying whether the specimen was close to failure.
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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 investigate the shear fatigue strength. This paper describes the recent tests on ten Tshaped prestressed beams with web reinforcement. The specimens were able to resist more load cycles than predicted by the approaches implemented in the Eurocodes for bridges. Based on the test results, design models for shear under cyclic loading should be reviewed and improved, especially regarding the assessment of existing structures.
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Ov, David, and Rolf Breitenbücher. "Influence of steel fibers on the fatigue behavior of high-performance concretes under cyclic loading." Acta Polytechnica CTU Proceedings 33 (March 3, 2022): 437–43. http://dx.doi.org/10.14311/app.2022.33.0437.

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Due to the advancement of high-performance concretes, the development of filigree constructions has been improved in the last decades. However, as the demand to create more filigree designs increases, the vulnerability to fatigue loads of such structures has also become a decisive factor. Various construction projects, such as wide-span bridges or wind turbines, are exposed to fatigue loads. Especially wind turbines are permanently subjected to wind and wave loads of several hundred million load cycles during their service life. At present, the fatigue behavior of high-performance concretes under cyclic loading is still unknown. In a worst-case scenario, the significantly lower ductility can lead to a sudden failure of the entire structure. In this case, the addition of steel fibers could be advantageous, as they significantly improve the ductility of concretes. However, it is still undetermined how the material fatigue is influenced by steel fibers. Hence, systematic investigations on the fatigue behavior of various high-strength concretes with steel fibers were conducted. Since the crack-bridging effect of fibers is relevant for tensile stresses, predominantly cyclic bending tests were performed on concrete beams with different steel fiber variations. To accomplish the investigations, a test setup has been developed which allows the simultaneous testing of a total of six specimens. Based on the predetermined static concrete strengths, the specimens were subjected to cyclic loads with a defined lower stress level and various upper stress levels. During these cyclic tests, the cycles-to-failure as well as the degradation within the microstructure were detected.
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Garner, Amy, Moneeb Genedy, R. Tarefder, and Mahmoud Reda Taha. "Monitoring Fatigue Damage in PC Using Carbon Nanotubes." Advanced Materials Research 1129 (November 2015): 94–101. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.94.

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Polymer concrete (PC) overlays are typically used in infrastructure applications, specifically bridges and parking structures, to provide durable protection to the structural system. However, PC suffers from cracking and crack propagation during its service life mostly due to fatigue. Fatigue cracking of PC results in limiting the service life of PC considerably. Monitoring of fatigue damage in PC can help extend PC service life.In this paper, we demonstrate the possible use of carbon nanotubes to monitor damage initiation and propagation in PC under fatigue loading. PC prisms were produced using epoxy polymer concrete with varying contents of multi-walled carbon nanotubes (MWCNTs). The percolation level of MWCNTs necessary to produce conductive PC was first determined. Fatigue testing using an AASHTO modified test set-up was conducted. Electrical conductivity of PC overlay was continuously measured during fatigue testing. Damage initiation and propagation in PC incorporating MWCNTs overlays can be detected and monitored.
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He, Zhi-Qi, Changxue Ou, Fei Tian, and Zhao Liu. "Experimental Behavior of Steel-Concrete Composite Girders with UHPC-Grout Strip Shear Connection." Buildings 11, no. 5 (April 24, 2021): 182. http://dx.doi.org/10.3390/buildings11050182.

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This paper develops a new type of shear connection for steel-concrete composite bridges using Ultra-High Performance Concrete (UHPC) as the connection grout. The UHPC-grout strip shear connection is fabricated by preforming a roughened slot in the concrete deck slab, welding an embossed steel rib longitudinally to the upper flange of the steel girder, and casting the strip void between the slot and the steel rib with UHPC grout. The structural performance of the new connection was validated by two sets of experimental tests, including push-out testing of shear connectors and static and fatigue testing of composite beams. The results of push-out testing indicate that the UHPC-grout strip shear connection exhibits a significant improvement of ductility, ultimate capacity, and fatigue performance. The interface shear strength of the UHPC-grout strip connection is beyond 15 MPa, which is about three times that of the strip connection using traditional cementitious grouts. The ultimate capacity of the connection is dominated by the interface failure between the embossed steel and the UHPC grout. The results of composite-beam testing indicate that full composite action is developed between the precast decks and the steel beams, and the composite action remained intact after testing for two million load cycles. Finally, the trail design of a prototype bridge shows that this new connection has the potential to meet the requirements for horizontal shear.
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Xu, Jun, Huahuai Sun, Weizhen Chen, and Xuan Guo. "Experiment-Based Fatigue Behaviors and Damage Detection Study of Headed Shear Studs in Steel–Concrete Composite Beams." Applied Sciences 11, no. 18 (September 7, 2021): 8297. http://dx.doi.org/10.3390/app11188297.

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Many in-service bridges with steel–concrete composite beams are currently aging and experiencing performance deterioration. Under long-term cyclic loads from traffic on bridges, headed shear studs in steel–concrete composite beams are vulnerable to fatigue damage. The comprehensive understanding of fatigue behaviors and the feasible detection of fatigue damage of headed shear studs is, thus, crucial for the accurate numerical simulation of the fatigue crack propagation process. The paper, thus, experimentally investigates the fatigue behaviors of headed shear studs through push-out tests of three specimens. The fatigue failure modes and cyclic strain evolution of specimens are analyzed. The fatigue lives of headed shear studs are compared with the S–N curves of the AASHTO, Eurocode 4 and BS5400 codes. The fatigue crack details of shear studs in push-out tests are then detected using the ultrasonic non-destructive testing. The results show that the root fracture is the main fatigue failure mode of shear studs under fatigue loading. The fatigue life estimations based on the three current codes (i.e., AASHTO, Eurocode 4 and BS5400) can be safely guaranteed only with different safety redundancies. The strain at the shear stud with fatigue damage shows a consistent increasing trend followed by decreasing behavior after reaching the peak value with the loading cycles. Moreover, the feasibility of the ultrasonic non-destructive testing with the combination of a strain measurement for fatigue crack details detection of headed shear studs in composite beams is proved.
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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 investigating a set of 50-year-old prestressed concrete bridge girders that were recovered from a decommissioned bridge. The activities included initial non-destructive tests, and then full-scale load tests followed by a destructive test on the material samples. This paper reports the experimental results of the full-scale tests conducted on the first group of four I-beams assumed to be in good condition from visual inspection at the time of testing. Loading tests were performed using a specifically designed steel reaction frame and a test setup equipment, as detailed in the present work. Due to the structural response of this first group of girders, a uniform behavior was found at both service and ultimate conditions. The failure mechanism was characterized by the crushing of the cast-in-situ top slab corresponding to a limited deflection, highlighting a non-ductile behavior. The outcomes of the experimental research are expected to provide new data for the life-cycle safety assessment of existing bridges through an extended database of validated experimental tests and models.
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McRory, Jared W., Fray F. Pozo-Lora, Zachary Benson, Raed Tawadrous, and Marc Maguire. "Behavior of Hybrid Reinforced Concrete Bridge Decks under Static and Fatigue Loading." Polymers 14, no. 23 (November 26, 2022): 5153. http://dx.doi.org/10.3390/polym14235153.

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This paper presents a new bridge deck reinforcement alternative using hybrid reinforced concrete (Hybrid) consisting of Glass Fiber Reinforced Polymer (GFRP) rebar and alkali-resistant fiberglass composite macrofibers added to the concrete mixture. Fiberglass composite macrofibers are a miniaturized GFRP reinforcing bar that is a composite of resin and glass fibers. An experimental testing program and analytical modeling were conducted to evaluate the structural performance at the service and ultimate limit states. Thirteen full-scale bridge deck specimens were constructed and tested under static and fatigue loading. The fatigue loading was applied up to two million cycles at a frequency of 4 Hz. Post-fatigue, the specimens were tested to failure to compare pre-and post-fatigue behavior. Simplified and moment-curvature analytical models were used to predict the specimens’ flexural strength at the ultimate level, and both were found to be accurate for predicting pre- and post-fatigue strength. Deflection and crack width were monitored throughout the fatigue loading, and these values were compared to the recommended AASHTO LRFD serviceability limits. Testing and analytical results showed that the Hybrid deck is a viable alternative to steel-reinforced and GFRP-reinforced bridge decks for flexural behavior. The service and ultimate level behavior of each bridge deck type was adequate as compared to the AASHTO LRFD service limits. The exceptional post-peak energy absorption demonstrated by the Hybrid adds ductility to previously elastic GFRP reinforced sections.
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Kitane, Yasuo, Amjad J. Aref, and George C. Lee. "Static and Fatigue Testing of Hybrid Fiber-Reinforced Polymer-Concrete Bridge Superstructure." Journal of Composites for Construction 8, no. 2 (April 2004): 182–90. http://dx.doi.org/10.1061/(asce)1090-0268(2004)8:2(182).

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Fathalla, Eissa, Yasushi Tanaka, and Koichi Maekawa. "Fatigue Life of RC Bridge Decks Affected by Non-Uniformly Dispersed Stagnant Water." Applied Sciences 9, no. 3 (February 12, 2019): 607. http://dx.doi.org/10.3390/app9030607.

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Stagnant water on reinforced concrete (RC) decks reduces their life significantly compared to the case of dry states. Fully submerged states have been investigated as the most severe case, which is however rarely experienced in reality. Currently, it is possible to simulate concrete–water interactions for lifetime prediction of RC decks. In this study, fatigue lifetime is systematically computed for various locations of stagnant water at the upper layer of RC decks. It is found that the patterns of wet and dry areas have a great influence on the remaining fatigue life even though the same magnitude of cracking develops. Then, a hazard map for the wetting locations with regard to the remaining fatigue life is presented based on the systematically arranged simulation. Finally, a nonlinear correlation is introduced for fatigue life prediction based upon site inspected wetting locations, which can be detected by non-destructive testing technology.
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Dissertations / Theses on the topic "Concrete bridges – Testing; Concrete – Fatigue"

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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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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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Dung, Pham-Thanh. "Strengthening of concrete bridges using reinforced sprayed concrete under state and fatigue loading." Thesis, Queen Mary, University of London, 1997. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1575.

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The Department of Transport's bridge assessment programme has revealed that a significant number of bridges are not strong enough to carry the much heavier commercial axle loads that will soon be applied to UK bridges. To address this problem, this research investigates a technique of strengthening concrete bridges by bonding and encapsulating an extra layer of reinforcement using sprayed concrete to the soffit of the bridge to increase the flexural capacity. An experimental investigation on approximately one eighth scale reinforced concrete slabs strengthened by different amounts of reinforcement placed at varying depths below the soffit and encapsulated by professionally applied dry-mix sprayed concrete, have shown that increased flexural capacity of up to eight times the original capacity is possible with no sign of breakdown of the bond at the soffit interface. Separate interface shear tests both direct and indirect were carried out and showed high shear capacities were obtained in all specimens. The susceptibility to weathering causing a breakdown of the interface bond was investigated by freeze-thaw tests. Fatigue load tests have also shown that the strengthened slabs have a similar life span to that of normal reinforced concrete. An analytical study was carried out, complemented by the fatigue load test results, to assess the life span of two highway bridges when subjected to fluctuating traffic loading, taking into account the proposed increasing use of heavier axle loads. All the slabs tested to failure under both static and fatigue loading failed in flexure and extremely good bond between the sprayed concrete layer and its substrate concrete was maintained right up to failure, even without shear connectors. The potential use of this technique in practice was therefore well demonstrated.
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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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Seracino, R. "Partial-interaction behaviour of composite steel-concrete bridge beams subjected to fatigue loading /." Title page, contents and abstract only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phs481.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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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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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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Shams, Mohamed Khalil. "Time-dependent behavior of high-performance concrete." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/20682.

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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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Books on the topic "Concrete bridges – Testing; Concrete – Fatigue"

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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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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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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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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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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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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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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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Ghorbanpoor, Alireza. Evaluation of post-tensioned concrete bridge structures by the impact-echo technique. McLean, Va: U.S. Dept. of Transportation, Federal Highway Administration, 1993.

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Book chapters on the topic "Concrete bridges – Testing; Concrete – Fatigue"

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Schacht, Gregor, Guido Bolle, and Steffen Marx. "Load Testing of Concrete Building Constructions." In 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., and John J. Myers. "Example Field Test to Load Rate a Prestressed Concrete Bridge." In 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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Haritos, Nicholas. "Experimental modal testing of reinforced concrete bridges." In European Seismic Design Practice, 93–100. London: Routledge, 2022. http://dx.doi.org/10.1201/9780203756492-15.

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Jauregui, David V., Brad D. Weldon, and Carlos V. Aguilar. "Load Rating of Prestressed Concrete Bridges without Design Plans by Nondestructive Field Testing." In 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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Lantsoght, E. O. L. "Assessment of existing concrete bridges by load testing." In 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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Bathon, Leander, and Oliver Bletz-Mühldorfer. "Fatigue Performance of Single Span Wood-Concrete-Composite Bridges." In Materials and Joints in Timber Structures, 493–97. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7811-5_45.

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Val, Dimitri V., and Mark G. Stewart. "Determination of Remaining Service Life of Reinforced Concrete Bridge Structures in Corrosive Environments after Load Testing." In 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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Crawford, K. C. "Non-Destructive Testing of FRP-Structural Systems Applied to Concrete Bridges." In 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, and S. C. Lovejoy. "Acoustic Emission Monitoring of Conventionally Reinforced Concrete Highway Bridges Under Service Conditions." In 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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Juen, Lukas, and Josef Fink. "Experimental Investigation of the Fatigue Behaviour of Concrete Dowels for the Use in Composite Constructions." In The Eight International Conference "Bridges in Danube Basin", 197–207. Wiesbaden: Springer Fachmedien Wiesbaden, 2013. http://dx.doi.org/10.1007/978-3-658-03714-7_14.

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Conference papers on the topic "Concrete bridges – Testing; Concrete – Fatigue"

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Bajaj, Mayank, and Biswajit Bhattacharjee. "Residual service life estimation of bridges." In 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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Sun, Zhenyu, Huating Chen, and Zefeng Zhong. "A Bayesian Regularization Neural Network Model for Fatigue Life Prediction of Concrete." In IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2022. http://dx.doi.org/10.2749/nanjing.2022.1959.

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<p>The fatigue life of concrete is affected by many interwoven factors whose effect is nonlinear. Because of its unique self-learning ability and strong generalization capability, a neural network model is proposed to predict concrete behavior in tensile fatigue. Firstly, the average relative impact value was constructed to analyze the importance of parameters affecting fatigue life, such as the maximum stress level Smax, stress ratio R, failure probability P, and static strength <i>f</i>. Then, using the backpropagation neural network improved by Bayesian regularization, S-N curves were obtained for the combinations of R=0,1, 0,2, 0,5; <i>f</i>=5, 6, 7MPa; P=5%, 50%, 95%. Finally, the tensile fatigue results obtained from different testing conditions were compared for compatibility. Besides utilizing the valuable fatigue test data scattered in the literature, insights gained from this work could provide a reference for subsequent fatigue test program design and fatigue evaluation.</p>
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Thapa, Aashish, Mustafa Mashal, and Mahesh Acharya. "Large-Scale Flexural Testing of Concrete Beams Reinforced with Conventional Steel and Titanium Alloy Bars." In IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2022. http://dx.doi.org/10.2749/prague.2022.0272.

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<p>The research focuses on the use of Titanium Alloy Bars (TiABs) in concrete cap beams. TiABs offer good ductility, high strength, lightweight, superior corrosion resistance, lower overstrength, and better fatigue performance. TiABs have recently been used in several existing bridges in Oregon and Texas in the United States to increase shear and flexural capacities of concrete beams. While TiABs have been implemented in retrofitting of existing bridges in the United States, their application in new structures have not been tested and compared against conventional steel rebars. Idaho State University (ISU) has been investigating application of TiABs in new concrete structures through large-scale testing. Past research at ISU has shown that the use of titanium alloy (Ti-6Al-4V) in new bridges can reduce rebar congestion and residual drift after an earthquake by 50% while providing adequate ductility and strength compared to cast-in-place construction. The research in this paper proposes concept for an innovative cap beam reinforced with longitudinal TiABs. The cap beam integrates both structural performance and durability. Flexural and shear design procedures for the cap beam in accordance with the AASHTO LRFD Design are discussed. To investigate structural performance, a large-scale cap beam reinforced with longitudinal grade 5 titanium alloy (Ti-6Al-4V) is tested under three-point bending test protocol. The results are compared against a benchmark cast-in-place beam with normal rebars under the same testing arrangement and loading protocol.</p>
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Gebauer, Daniel, Steffen Marx, and Gregor Schacht. "Testing Existing Structures – Compressive Strength and Tensile Split- ting Strength of the Lahntal Bridge Limburg." In 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.2019.1619.

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<p>In 2016, the Lahntal Bridge near Limburg was replaced by a new structure. The existing bridge was deconstructed on a formwork carriage. Before the deconstruction, more than 250 concrete cores and other specimens were taken from the existing structure. The samples are located all over the cross section and the length of the bridge. These specimens are examined for their material prop- erties.</p><p>The investigations include the experimental determination of the compressive strength, the tensile splitting strength, the creep behaviour, the chloride ingress, fatigue tests and the anchoring behav- iour of the tendons. This paper deals with the compressive strength and the tensile splitting strength.</p><p>The results of these tests are statistically evaluated by determining the mean value, the standard deviation and the coefficient of variation. In addition, it is examined whether there are any correla- tions between various material properties. The results are also compared to the normative expec- tations of Eurocode 2.</p>
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Parkash, Suraj, and Ram Kumar. "Fatigue Damage Study of Prestressed Concrete Bridges." In IABSE Symposium, Weimar 2007: Improving Infrastructure Worldwide. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2007. http://dx.doi.org/10.2749/weimar.2007.0161.

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Kuhlmann, Ulrike, Simon Bove, Stephanie Breunig, and Karl Drebenstedt. "Fatigue of steel bridges." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.7212.

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Highway and railway bridges are exposed to cyclic stressing due to traffic loads and, therefore, have to be evaluated concerning fatigue. In most cases the fatigue evaluation is performed according to Eurocode 3 Part 1-9 on nominal stresses. To apply this nominal stress approach a detail catalogue is required classifying all relevant constructional details in terms of fatigue. Unfortunately, the existing detail catalogue of Eurocode 3 Part 1-9 reflects the state of the art of the 1990s and misses constructional details being important for today’s bridge design. As an example the derivation of a new detail, the so-called lamellae joint, is presented. Furthermore, for two new types of innovative steel bridges, where Eurocode 3 Part 1-9 does not yet specify rules able to evaluate the characteristics of these bridges, research results are shown. These are the thick-plate trough bridges and truss bridges made of thick-walled circular hollow sections (CHS). The paper starts with an overview on the recent Eurocode developments, addressing more specific the fatigue verification according to EN 1993-1-9 and the statistical analysis of fatigue test data. In the following, information is given on the outcome of some recent research projects striving to extend the application range of Eurocode 3 Part 1-9. The final conclusion, in spite of all differences, show a common tendency.
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Porsch, Markus, Cenk Üstündag, and Gerhard Hanswille. "Steel-concrete composite bridges subjected to fatigue loading." In IABSE Symposium, Weimar 2007: Improving Infrastructure Worldwide. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2007. http://dx.doi.org/10.2749/222137807796120184.

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"Load Testing of Highly Skewed Concrete Bridges." In 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." In 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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""Diagnostic Load Testing of Concrete Bridges, Principles and Example "." In 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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Reports on the topic "Concrete bridges – Testing; Concrete – Fatigue"

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Peterman, Robert, and 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, and 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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Wang, Yao, Mirela D. Tumbeva, and 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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PERFORMANCE OPTIMIZATION OF A STEEL-UHPC COMPOSITE ORTHOTROPIC BRIDGE WITH INTELLIGENT ALGORITHM. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.160.

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To address the problems of pavement damage and fatigue cracking of orthotropic steel deck (OSD) in bridges, an innovative composite bridge deck composed of OSD with open ribs and ultra-high performance concrete (UHPC) layer was proposed. Firstly, the stress responses of fatigue-prone details in the composite bridge deck were investigated by refined two-scale finite element analysis. The results show that the rib-to-deck joint can achieve an infinite fatigue life, while the floorbeam detail of rib-tofloorbeam joint indicates finite fatigue life. Then, response surface models of stress ranges of fatigue details and structure weight were derived via both the central composite design and response surface method. Finally, to improve the fatigue performance for achieving an infinite fatigue life under relatively low structure weight, the multi-objective optimization was executed by an Improved Non-dominated Sorting Genetic Algorithm (NSGA-II). The obtained Pareto front shows that there is a strong competition between the stress range of fatigue-prone detail and structure weight.
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