Large-scale OT-slab tests: Laboratory measurements and evaluation

C.O. Christensen, P. S. Halding, P. Goltermann, J. W. Schmidt

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


Full-scale testing of existing bridges is one of the main tasks in an ongoing Danish research project. One of the initial tasks of this project involved full-scale load tests of multiple OT-slab bridges, which showed a large unexpected capacity reserve compared to the theoretical predictions. A part of this reserve may be dedicated to a higher shear load transfer between OT-beam elements than anticipated. Laboratory testing of scaled OT-slab bridge elements was initiated to examine the load transfer in OT-slabs and investigate the precision and robustness of the applied monitoring approaches used for in-situ load testing. Each OT-slab element consisted of seven adjacent OT-beams with a width of 246 mm, height of 300 mm, and length of 8400 mm. Including an additional concrete top layer, the slab elements had a dimension of 1722 mm in width, 8400 mm in length, and 370 mm in height. The slab elements were supported along three edges and loaded by a point load in the middle of the unsupported edge. The monitoring setup included internal measurements (strain gauges), external contact measurements (distance lasers, LVDT’s), and non-contact measurements (Digital Image Correlation). Qualitative findings regarding transverse load transfer are presented for the first OT-slab test, along with a performance evaluation of the laboratory and monitoring setup for the given application.
Original languageEnglish
Title of host publicationBridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability
EditorsJoan Ramon Casas , Dan M. Frangopol , Jose Turmo
PublisherCRC Press
Publication date2022
ISBN (Print)978-1-032-35623-5
Publication statusPublished - 2022
Event11th International Conference on Bridge Maintenance, Safety and Management (IABMAS 2022) - Barcelona, Spain
Duration: 11 Jul 202215 Jul 2022


Conference11th International Conference on Bridge Maintenance, Safety and Management (IABMAS 2022)


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