Fakultät Bauingenieurwesen
https://opara.zih.tu-dresden.de/xmlui/handle/123456789/55
2024-03-29T06:18:28ZRaw data of the cyclic tests on the cylindrical specimens
https://opara.zih.tu-dresden.de/xmlui/handle/123456789/6035
Raw data of the cyclic tests on the cylindrical specimens
Birkner, Dennis
This dataset contains the raw data of the cyclic tests on concrete cylinders to determine the number of cycles to failure and the stiffness develpment of the different batches. Two concrete mixes were investigated (C30 and C80). The batch is referenced by a roman number (I to VI). The specimens were loaded with a sinusoidal load, oscillating between a relative minimum and a maximum load level. The minimum load level is 5% of the average compressive strength of the respective comcrete batch and the maximum load level either 65% or 75%, which can be found in the file name. Some specimens were subjected to a two stage loading, which is indicated by '7565' for high-low loading or '6575' for low-high loading respectively. The specimens were loaded until failure. If a maximum number of cycles of 2 million was reached, they were stopped as well and counted as run-outs.
Following channels are used in each file: Zeit (Standardmessrate) [time (standard measuring rate)] in s, Zeit (langsame Messrate) [time (slow measuring rate)] in s, Kraft [force] in kN, Maschinenweg [machine displacement] in mm, Laser bei Umfang [displacement measured by laser sensor at circumference] 0° in mm, Laser bei Umfang [displacement measured by laser sensor at circumference] 120° in mm, Laser bei Umfang [displacement measured by laser sensor at circumference] 240° in mm, Lufttemperatur [air temperature, related to the slow measuring rate] in °C, Temperatur Mitte [temperature at middle height of the specimen] in °C, Lastwechsel [number of cycles], Laser gemittelt [average of the three laser sensors] in mm
2023-01-01T00:00:00ZRaw data of the creep tests on cylindrical specimens
https://opara.zih.tu-dresden.de/xmlui/handle/123456789/6027
Raw data of the creep tests on cylindrical specimens
Birkner, Dennis; Marx, Steffen
This dataset contains the raw data of the creep tests on the concrete cylinder specimens. Four batches (batch 1 and 2 of concrete C80 and batch 3 and 4 on concrete C30) were tested. Three specimens were placed on top of each other in each test and loaded with the same load. The specimens are referenced with letters O (top), M (middle) and U (bottom). Following measuring channels are used in each file:
- Zeit (time) in s
- Umgebungstemperatur (ambient temperature) in °C
- Luftfeuchtigkeit (relative humidity) in %
- Kraft (force) in kN
- Verformung bei Umfang (displacement at circumference) 0° in mm
- Verformung bei Umfang (displacement at circumference) 120° in mm
- Verformung bei Umfang (displacement at circumference) 240° in mm
- Mittelweg der drei Verformungen (average value of the three displacements) in mm
2023-01-01T00:00:00ZRaw data of the cylinder tests for determining compressive strength and modulus of elasticity
https://opara.zih.tu-dresden.de/xmlui/handle/123456789/6000
Raw data of the cylinder tests for determining compressive strength and modulus of elasticity
Birkner, Dennis
This dataset contains the raw data of the tests on concrete cylinders to determine the compressive strength and the modulus of elasticity of the different batches. Two concrete mixes were investigated (C30 and C80). The batch is referenced by a roman number (I to VI). Three cylinder specimens were tested from each batch. The first was loaded with continously increasing force until failure. The ultimate load was used to determine the load levels of the tests for the modulus of elasticity according to DIN EN 12390-13, method B, for the tests on the other two specimens. After carrying out these two tests, both specimens were also loaded with increasing force until failure. Following channels are used in each file:
Zeit (Standardmessrate) [time (standard measuring rate)] in s, Zeit (langsame Messrate) [time (slow measuring rate)] in s, Kraft [force] in kN, Maschinenweg [machine displacement] in mm, Laser bei Umfang [displacement measured by laser sensor at circumference] 0° in mm, Laser bei Umfang [displacement measured by laser sensor at circumference] 120° in mm, Laser bei Umfang [displacement measured by laser sensor at circumference] 240° in mm, Lufttemperatur [relative humidity, related to the slow measuring rate] in °C, DD1_1 und DD1_2 (LVDT, placed at middle specimen height at 0° and 180°, measuring length 150 mm) in mm
2023-01-01T00:00:00ZOntologies, SHACL-Rules and SPARQL-Queries of PhD-Thesis "An ontology-based approach for automatized evaluation of structural damage in a digital data environment"
https://opara.zih.tu-dresden.de/xmlui/handle/123456789/5794
Ontologies, SHACL-Rules and SPARQL-Queries of PhD-Thesis "An ontology-based approach for automatized evaluation of structural damage in a digital data environment"
Hamdan, Al-Hakam
New technologies in the field of building and damage detection lead to an automation of inspection processes and thus an increase in efficiency. However, an adequate digitalisation of the recorded building data into a BIM model is currently not possible without problems. One main reason for this is the lack of specifications for a digital model that can represent recorded damages. Thereby, a primary problem are uncertainties and fuzzy data in the information modelling, which usually does not occur when applying BIM for new buildings. Fuzzy information, such as the classification of detected damages or the assumption of further hidden damages, is currently evaluated manually by experts, which often requires a complex evaluation of contextual information in a multitude of distributed building documents. An automated evaluation of detected damages based on the building context is applied or implemented in practice. In this thesis a concept for the representation of structural damages in a digital, generically structured damage model is presented. The developed concept offers solutions for problems of current damage modelling, e.g. the management of heterogeneous documentation data, versioning of damage objects or processing of the damage geometry. The modular scheme of the damage model consists of a generic core component, which allows a general description of damages, independent of specifying factors, such as the type of construction or building material concerned. For the definition of domain-specific information, the core component can be supplemented by corresponding extension schemes. As a preferred serialisation option, the damage model is implemented in a knowledge-based ontology. This allows an automated evaluation of the modelled damage and context information using digitised knowledge. For the evaluation of fuzzy damage information, a knowledge-based evaluation procedure is presented. The developed damage evaluation system allows a classification of detected damages as well as the conclusion of implicit evaluation information relevant for further maintenance planning. In addition, the method allows the assumption of undetected damages that can potentially occur inside the structure or in places that are difficult to reach. In the ontological assessment, not only damage characteristics are considered, but also information regarding the building context, such as the affected component or material type as well as existing environmental conditions. To illustrate the developed specifications and methods, the whole concept is applied to two test scenarios.
2023-01-01T00:00:00Z