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Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels
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Full scale tests of various buried flexible structures under failure load
1Road, Bridge and Railway Department, Faculty of Civil Engineering, Architecture and Environmental Engineering, University of Zielona Góra, Prof. Z Szafrana St. No. 1, Building A-8, 65-417, Zielona Gora, Poland. awysokowski@infra-kom.eu.
Scientific Reports
|January 26, 2022
Summary
Buried flexible structures, including PE plastic pipes and steel culverts, safely withstood extreme loads and reduced backfill, demonstrating resilience beyond standard recommendations in full-scale laboratory tests.
Area of Science:
- Civil Engineering
- Materials Science
- Structural Engineering
Background:
- Flexible culverts are critical infrastructure components.
- Understanding their performance under extreme conditions is essential for safety and design.
- Current standards may not fully cover scenarios with reduced cover or overload.
Purpose of the Study:
- To perform displacement and stress analysis on four buried flexible structures under failure load.
- To validate the performance of structures made with different technologies.
- To create a database for verifying numerical methods like Finite Element Method (FEM).
Main Methods:
- Full-scale laboratory testing of four buried flexible culvert models (PE plastic pipe, corrugated steel pipe, Box Culvert, Multi Plate non-circular structure).
- Application of reduced backfill (0.3 m) and increased load (1960-2000 kN).
- Measurement of displacement (PE pipe) and stress (steel structures) at critical points.
Main Results:
- All structures performed safely despite reduced cover and loads nearly 4 times higher than standards.
- Maximum displacement in PE pipe crown reached 12.57 mm.
- Maximum stresses in steel structures ranged from 85.28 MPa (corrugated steel pipe) to 447.9 MPa (Multi Plate).
- The Multi Plate structure experienced stress exceeding limits but maintained stability.
Conclusions:
- Buried flexible structures demonstrate significant safety margins under conditions exceeding standard recommendations.
- Laboratory tests confirm the structural integrity of PE plastic and various steel culverts.
- The study provides valuable data for the verification of numerical analysis methods in culvert design.
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