Browsing by Author "Walker, Maria"

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  • ItemOpen Access
    Experimental procedure for the tests on the openLAB from 2025-05-05 to 2025-05-07
    (Technische Universität Dresden, 2025-12-19) Richter, Bertram; Ulbrich, Lisa; Kielreiter, Anett; Jansen, Andreas; Röder, Robert; Walker, Maria; Jesse, Frank
    This dataset presents the experimental campaign and monitoring data from the openLAB research bridge, a large-scale laboratory structure located in Bautzen, Germany. The experimental campaign with damaging loading tests was carried out between 2025-05-05 and 2025-05-07 (inclusive). The dataset includes the protocol of the measurement campaign, monitoring data for air temperature and structural temperature, humidity, solar radiation as well as tilt measurements. Data are sourced from an electrical Gantner Instruments measurement system (Q.station 101T, with various Q.bloxx modules) and several testo 176 T4 data loggers. Datasheets for all sensors and data loggers are provided. The repository provides the data in Comma Separated Values (CSV) and Tab Separated Values (TSV) format. Each file includes a header specifying the names of the data columns. Additional details, such as units and sampling frequency, are provided in this README file. Each CSV file contains a Timestamp column that records the time of each sample as a datetime string in ISO 8601 format, without time zone information. All timestamps are in Coordinated Universal Time (UTC). Sensor data is represented as decimal numbers.
  • ItemOpen Access
    Monitoring Data of the openLAB Research Bridge – Load Test on PE 2.1
    (Technische Universität Dresden, 2025-07-14) Herbers, Max; Richter, Bertram; Walker, Maria; Marx, Steffen
    Between May 5 and 7, 2025, extensive experiments were carried out on the openLAB research bridge. The test program was structured as follows: • Day 1: Static and dynamic measurements in the reference state • Day 2: Loading of the bridge using hydraulic jacks up to the ultimate limit state (yielding of prestressing steel) • Day 3: Local damage of prestressing tendons (cutting wires at several locations) The present dataset contains force and displacement measurements from the load test conducted on Day 2. The load was applied locally to precast element (PE) 2.1 (Field 2, PE axis 1) using two hydraulic jacks and increased up to 400 kN. Displacements were measured at five different positions along PE axis 1. Details on the measurement setup can be found in the attached file readme.txt. Additional information on the project, the bridge and reference-phase measurements is available under the following references: https://doi.org/10.1016/j.dib.2025.111624 https://onlinelibrary.wiley.com/doi/10.1002/best.202300094 Herbers, M., Richter, B., Jan-Hauke, B., Al-Zuriqat, T., Smarsly, K., & Marx, S. (2024, November). openLAB – A large-scale demonstrator for advancing digital twin developments of bridges. In 2024 fib Symposium (pp. 2057–2067). (see attachment) Value of the data: • Validation and calibration of finite element models (FEM) • Comparison with geodetic measurement methods (e.g., total station, drone survey) • Basis for interpreting data from additional monitoring systems (e.g., distributed fiber optic sensing, acceleration measurements, acoustic emission monitoring, etc.) The provided Python script enables data import, post-processing, and visualization of the measurement data (see example figures).
  • ItemOpen Access
    Photographic documentation of crack development on the openLAB during the loading test on 2025-05-06
    (Technische Universität Dresden, 2025-11-17) Richter, Bertram; Walker, Maria; Müller, Marie Luise; Speck, Kerstin; Collin, Fabian
    Between 2025-05-05 and 2025-05-07, extensive experiments were carried out on the openLAB research bridge. The test program was structured as follows: - Day 1 (2025-05-05): Static and dynamic measurements in the reference state - Day 2 (2025-05-06): Loading of the bridge with hydraulic jacks up to the ultimate limit state - Day 3 (2025-05-07): Local damage to the prestressing tendons (cutting wires at several locations) This dataset contains pictures of cracks in the precast element (PE) 2.1 during the load test conducted on day 2. The load was applied locally to the prestressed element (PE) 2.1 (span 2, PE axis 1) using two hydraulic jacks and increased in steps up to a total of 400 kN. The pictures were taken using a Dino-Lite AM4113T digital microscope connected to a laptop running the DinoCapture 2.0 software. One set of pictures was taken for each load step, before applying the load and during the plateau of constant deflection (5 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm).