State-of-the-art on load testing of concrete bridges

Lantsoght, Eva O. L.; Veen, C. van der; Boer, Ane de; Hordijk, D.A.

doi:10.1016/j.engstruct.2017.07.050

Cited by 75 publications

(44 citation statements)

References 101 publications

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“…Proof load testing determines the magnitude and configuration of loads that cause structural components to approach their elastic limit (Cai et al, 2012), and typically the loads are applied statically using blocks, sandbags, etc. (Lantsoght et al, 2017). In some cases, the proof load test targets critical components rather than testing the full bridge.…”

Section: Field Testingmentioning

confidence: 99%

Field Testing of a Prestressed Concrete Bridge With High Performance and Locally Developed Ultra-High Performance Concrete Girders

Alahmari

Kennedy²,

Cuaron

et al. 2019

Front. Built Environ.

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Recent research has developed mixture proportions for ultra-high performance concrete (UHPC) using materials primary local to New Mexico, United States of America (USA). In 2017, a two-span bridge was constructed in Anthony, New Mexico, USA consisting of prestressed girders using the locally developed non-proprietary UHPC, for span one, and high performance concrete (HPC), for the second span. Field tests were conducted on the bridge ∼9 months apart to investigate the performance and behavior of the UHPC and provide baseline data for future studies and condition evaluation of the bridge. The load tests consisted of various load configurations utilizing up to four trucks weighing 267 kN on average. The load paths were designed to maximize strains along the length of the bridge and investigate transverse load distributions between girders. The measured results provide a comparison of the behavior and performance of the UHPC and the HPC girders and were also compared to the American Association of State Highway and Transportation Officials (AASHTO) predicted behaviors. This study is one of the first that compares HPC and non-proprietary UHPC bridge performance subjected to the same environmental conditions and vehicular loading. The findings of the study will aid in the development of recommendations incorporating UHPC into design provisions as well as provide meaningful information of the short and long-term performance between the two materials including durability and load distribution.

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Section: Field Testingmentioning

confidence: 99%

Field Testing of a Prestressed Concrete Bridge With High Performance and Locally Developed Ultra-High Performance Concrete Girders

Alahmari

Kennedy²,

Cuaron

et al. 2019

Front. Built Environ.

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“…As for bridges, some trucks of known weight, arranged in one or more rows, are positioned on the deck in predetermined positions. Levels or total stations are used to measure beam deflections; additional dynamic tests are performed, depending on the importance of the structure [1].…”

Section: Introductionmentioning

confidence: 99%

TLS for Dynamic Measurement of the Elastic Line of Bridges

Artese

Zinno

2020

Applied Sciences

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The evaluation of the structural health of a bridge and the monitoring of its bearing capacity are performed by measuring different parameters. The most important ones are the displacements due to fixed or mobile loads, whose monitoring can be performed using several methods, both conventional and innovative. Terrestrial Laser Scanner (TLS) is effectively used to obtain the displacements of the decks for static loads, while for dynamic measurements, several punctual sensors are in general used. The proposed system uses a TLS, set as a line scanner and positioned under the bridge deck. The TLS acquires a vertical section of the intrados, or a line along a section to be monitored. The instantaneous deviations between the lines detected in dynamic conditions and the reference one acquired with the unloaded bridge, allow to extract the displacements and, consequently, the elastic curve. The synchronization of TLS acquisitions and load location, obtained from a Global Navigation Satellite System GNSS receiver or from a video, is an important feature of the method. Three tests were carried out on as many bridges. The first was performed during the maneuvers of a heavy truck traveling on a bridge characterized by a simply supported metal structure deck. The second concerned a prestressed concrete bridge with cantilever beams. The third concerned the pylon of a cantilever spar cable-stayed bridge during a load test. The results show high precision and confirm the usefulness of this method both for performing dynamic tests and for monitoring bridges.

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“…Reinforced concretes have been applied worldwide in structural engineering since the beginning of the nineteenth century [1][2][3][4][5]. However, structure damage has increasingly occurred under aggressive service environments, which might be caused by ambient temperature, freeze-thaw cycles, precipitation, carbon dioxide, chloride, and sulfate [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Concrete Failure Time Based on Statistical Properties of Compressive Strength

et al. 2020

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Since the heterogeneity of the cement-based material contributes to a random spatial distribution of compressive strength, a reliability analysis based on the compressive strength of concrete is fundamental to carry out structural safety assessment. By analyzing 10,317 datapoints on compressive strength of concrete, a time-varying reliability evaluation based on the third-moment (TM) method was proposed to predict the service life of concrete. Unlike the second-moment (SM) method, skewness is taken into account in the TM; thus, the calculated result of concrete failure time based on the TM is more accurate. In this paper, the errors of the calculated results using time-varying reliability evaluation are within 3%, as shown by Monte Carlo (MC) simulation. In addition, the proposed model (aiming to calculate the equivalent design compressive strength) verifies the concrete failure time calculated by time-varying reliability. According to the results, concrete failure times calculated by these two models are in good agreement. Overall, based on the simple and effective methodology adopted in this paper, it is feasible to develop time-varying reliability based on other factors that might also lead to concrete failure, such as carbonation-induced corrosion, cracking, or deflection of the concrete.

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State-of-the-art on load testing of concrete bridges

Cited by 75 publications

References 101 publications

Field Testing of a Prestressed Concrete Bridge With High Performance and Locally Developed Ultra-High Performance Concrete Girders

Field Testing of a Prestressed Concrete Bridge With High Performance and Locally Developed Ultra-High Performance Concrete Girders

TLS for Dynamic Measurement of the Elastic Line of Bridges

Prediction of Concrete Failure Time Based on Statistical Properties of Compressive Strength

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