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Degradation Analyses of Systemic Large-Panel Buildings Using Comparative Testing during Demolition
Maciej Wardach1, Janusz R Krentowski1, Piotr Knyziak2
1Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, Wiejska 45E, 15-351 Bialystok, Poland.
Materials (Basel, Switzerland)
|June 10, 2022
Summary
Assessing large-panel buildings is challenging due to NDT uncertainty. This study compared NDT and destructive tests on a demolished building, validating methods for evaluating prefabricated structures.
Area of Science:
- Civil Engineering
- Structural Health Monitoring
- Materials Science
Background:
- Assessing the technical condition of large-panel buildings is difficult due to ongoing use and thermomodernization, leading to high uncertainty in non-destructive testing (NDT) results.
- Destructive testing offers high confidence but is rarely feasible, while local sampling provides only a partial assessment of prefabricated structures.
- Joints in precast elements are particularly vulnerable and difficult to access, posing a significant challenge in evaluating structural integrity.
Purpose of the Study:
- To evaluate the effectiveness of various visual, non-destructive, and destructive testing methods for assessing the technical condition of large-panel buildings.
- To compare the results from different testing methods, enabling the scaling of NDT techniques and identification of typical defect patterns.
- To determine the usefulness of specific research methods for the technical evaluation of prefabricated buildings.
Main Methods:
- Visual inspection of the building exterior and interior.
- Non-destructive testing (NDT) methods, including [specific NDT methods if available in the abstract].
- Destructive testing involving large-scale sampling during building demolition.
Main Results:
- Comparison of visual, NDT, and destructive test results revealed significant discrepancies and highlighted the limitations of NDT methods.
- Large-scale demolition sampling allowed for the identification of hidden defects, particularly in the joints connecting precast elements.
- The study established correlations between NDT findings and actual defect conditions, aiding in the calibration and validation of NDT techniques for prefabricated structures.
Conclusions:
- The technical condition assessment of large-panel buildings requires a combination of methods due to inherent uncertainties in NDT.
- Destructive testing, though rarely possible, provides crucial data for validating NDT methods and understanding degradation patterns in prefabricated structures.
- The findings offer valuable insights for improving the reliability of structural health monitoring in similar large-panel buildings.
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