Textile reinforcement (SFB 528 / Service Project Y1)
Project title
Textile reinforcement for structural strengthening and repair
Sub-project: Ditgital photogrammetric techniques for measuring deformation, cracks and structural changes during load tests of textile reinforced test objects
Funding
German Research Foundation (DFG), SFB 528
Aims
- The subproject Y1 develops and applies methods of digital photogrammetry and computer tomography for the automatic measurement of two- and three-dimensional displacement fields, deformations and surface defects such as cracks of test objects and structures during short and long time load tests.
- Determination of optimal methods and parameters, optimization and further development of algorithms to improve the measurment precision and interpretation, cataloging characteristic parameters (material, methods, ..)
- Simultaneous use of geometric and radiometric high-resolution cameras, infrared thermography and computer tomography
- Scientifically support of subprojects: A2, A3, A5, B1, C1, C3, C5 and D2
Results
- Methods of digital photogrammetry depict a suitable tool for the automatic measurement of two- and three-dimensional displacement fields, deformations and surface defects such as cracks of textile reinforced test objects and structures during short and long time load tests.
- The determination of characteristically material and process parameters plays an important roll in connection with selection, use and development of optimal measuring methods.
- On basis of this knowledge, concepts for a modular photogrammetric measuring system were developed and realized.
Applications
- Verification and variance comparison
- Calibration of fiber-bragg-grid-sensors (mirror photogrammetry) (SP A2)
- Determination of deformations and cracks during tension tests of textile reinforced concrete (SP B1)
- Determination of deformations, strain and cracks during shear tests of textile reinforced concrete (SP C1)
- Determination of deformations, strain and crakcs during load test of textile reinforced wood (TP C3)
- Determination of deformations during shear tests of concrete (TP D2)
- Material analysis of textile reinforced concrete and wood with computer tomography
Related Publications
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Contact
- Prof. Dr. habil. Hans-Gerd Maas (project management)
- Dipl.-Ing. Uwe Hampel (project work)