FOSsure

Table of contents

1. 1. 1. Project data
      2. Abstract

Project data

Title TP of TU Dresden in the joint research project FOSsure: Fiber optic sensors for reliable condition assessment of concrete bridges | SP of TU Dresden in the joint research project FOSsure: Fiber optic sensors for reliable condition assessment of concrete bridges Sponsor | Funding Federal Ministry for Digital and Transport Affairs (BMDV) / mFUND Period | Period 02/2025 - 01/2028 Joint project and sub-project leader | Joint project and sub-project leader Prof. Dr.-Ing. Steffen Marx Subproject manager | Subproject manager Prof. Dr.-Ing. Steffen Marx Team | Team Maria Walker, Bertram Richter, Kleo Lila Project partners Hentschke Bau GmbH, Bautzen | FOLAB GmbH, Weimar | Federal Institute for Materials Research and Testing, Berlin | AIT Austrian Institute of Technology GmbH, Vienna Associated partners | Associated partners Autobahn GmbH des Bundes, Berlin | Bundesanstalt für Straßenwesen (BASt), Bergisch Gladbach | Landeshauptstadt Dresden | Autobahnen- und Schnellstraßen-Finanzierungs-Aktiengesellschaft, Vienna | Niedersächsische Landesbehörde für Straßenbau und -verkehr, Hanover

Abstract

Long-term fiber optic measurements on solid bridges provide real data for the identification of impacts (traffic, temperature), structural reactions and damage. Evaluation methods and information extraction procedures for large amounts of DFOS data are developed and integrated into computational verifications and evaluation processes. Findings are incorporated into monitoring concepts for new and existing buildings.

The aim of the TUD sub-project is to develop standardized DFOS monitoring concepts for three typical damage mechanisms in solid construction: coupling joint problems, shear force problems and stress corrosion cracking. A holistic monitoring concept includes

• the selection of the measuring system including the sensor type and the installation method,
• sensor routing (arrangement of the sensors on the structure depending on the probability of detection (PoD)),
• the definition of measurement campaigns (measurement times, frequencies),
• the development of procedures for the automated evaluation and assessment of DFOS monitoring data and
• the integration of the measurement data into the verification process so that a mathematical assessment of the condition of the structure is possible.

In addition, influences from measurement uncertainty are being researched with regard to their sensitivity to the verification process and methods are being developed for the efficient updating of monitoring reports, taking into account changing measurement systems.