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Danish concrete bridge in-situ load testing: considerations and test results.

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Title: Danish concrete bridge in-situ load testing: considerations and test results.
Authors: Schmidt, Jacob W.1 (AUTHOR) jws@build.aau.dk, O. Christensen, Christian1 (AUTHOR), D. S. Damsgaard, Kenneth1,2 (AUTHOR), Bang, Rasmus3 (AUTHOR), von Scholten, Christian2 (AUTHOR), Goltermann, Per4 (AUTHOR), Engelund, Svend2 (AUTHOR)
Source: Structure & Infrastructure Engineering: Maintenance, Management, Life-Cycle Design & Performance. May/Jun2026, Vol. 22 Issue 5/6, p841-861. 21p.
Subjects: Concrete bridges, Bridge testing, Classification, Shearing force, Interdisciplinary research
Abstract: A Danish concrete bridge proof loading project (V1) was initiated in 2016, followed by a project extension (V2) in 2023. The primary objective of V1 was to establish a classification-based proof loading procedure utilising the Danish classification system. In the V1 project, a multidisciplinary approach was developed for the evaluations involving multi-scale testing, theoretical response evaluations, and probabilistic assessments. Several bridges were successfully reclassified to a higher capacity through pilot projects using the developed procedure. Based on the findings, a Danish national guideline was published in December 2024. The V2 project builds on this foundation, expanding its scope to include multi-span and non-shear-reinforced concrete slab bridges. This paper presents key findings and milestones from the V1 project, encompassing the background, design, and execution of the first V2 in-situ tests on a Danish highway bridge, with representative results on non-shear reinforced wings and slabs. Shear failure in the concrete slab occurred at an axle load of approximately 250 tonnes. Shear failure initiation in the tested wing was reached at a wheel load of approximately 50 tonnes. The margin from crack identification to failure is currently under investigation, and extensive information is being generated to support a multidisciplinary approach, thus aiming to provide a basis for shear-related stop criteria. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:A Danish concrete bridge proof loading project (V1) was initiated in 2016, followed by a project extension (V2) in 2023. The primary objective of V1 was to establish a classification-based proof loading procedure utilising the Danish classification system. In the V1 project, a multidisciplinary approach was developed for the evaluations involving multi-scale testing, theoretical response evaluations, and probabilistic assessments. Several bridges were successfully reclassified to a higher capacity through pilot projects using the developed procedure. Based on the findings, a Danish national guideline was published in December 2024. The V2 project builds on this foundation, expanding its scope to include multi-span and non-shear-reinforced concrete slab bridges. This paper presents key findings and milestones from the V1 project, encompassing the background, design, and execution of the first V2 in-situ tests on a Danish highway bridge, with representative results on non-shear reinforced wings and slabs. Shear failure in the concrete slab occurred at an axle load of approximately 250 tonnes. Shear failure initiation in the tested wing was reached at a wheel load of approximately 50 tonnes. The margin from crack identification to failure is currently under investigation, and extensive information is being generated to support a multidisciplinary approach, thus aiming to provide a basis for shear-related stop criteria. [ABSTRACT FROM AUTHOR]
ISSN:15732479
DOI:10.1080/15732479.2026.2647031