Infrastructural Element Integrity Assessment via Bending Stiffness
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Solution Overview
Problem
Current methods for determining the structural integrity of infrastructural elements, such as bridges, require complex systems of sensors and data transmission networks, which are prone to malfunctioning and are expensive to install and maintain, necessitating a more cost-effective and simpler monitoring approach.
Innovation Solution
A method that calculates the bending stiffness of a main structural body over time using deformation measurements, allowing for the detection of changes in material or geometrical properties, which serve as a global indicator of damage, without the need for numerous sensors and complex data systems, by determining the load configuration and comparing initial and final bending stiffness values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex systems of sensors and data transmission networks are used to determine structural integrity, then measurement precision is improved, but device complexity increases and reliability decreases
Solution Approach 1:
The patent extracts only the essential measurement function needed for structural integrity assessment - specifically measuring deformations at critical locations (supports) rather than deploying comprehensive sensor networks. This selective extraction of the core measurement need eliminates unnecessary system complexity while maintaining assessment accuracy.
Solution Approach 2:
The patent makes the deformation measurement means serve multiple functions: they simultaneously measure deformations, enable calculation of bending stiffness, and provide data for structural integrity assessment. This multi-functionality eliminates the need for separate sensor systems for each measurement type, reducing overall device complexity.
2Measurement precision
If complex systems of sensors and data transmission networks are used to determine structural integrity, then measurement precision is improved, but reliability decreases due to malfunctioning
Solution Approach 1:
The patent removes the vulnerable data transmission network component entirely from the system, keeping only the essential deformation measurement means. This extraction eliminates potential failure points in communication systems while maintaining the core measurement capability needed for structural integrity assessment.
Solution Approach 2:
The system uses the infrastructural element's own mechanical response (deformations under load) as the measurement signal, eliminating the need for external power sources, data transmission infrastructure, or complex processing systems. The structure itself provides the measurement information needed.
3Measurement precision
If numerous sensors are deployed to measure local phenomena, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies measurements only at locally critical positions - specifically at the supports of the infrastructural element where bending moments are highest and structural integrity is most concerning. This localized measurement approach provides sufficient precision for integrity assessment without requiring numerous sensors across the entire structure.
Solution Approach 2:
Instead of measuring many local parameters and synthesizing global information, the patent measures global deformations at strategic locations (supports) and uses these to infer local structural conditions and overall integrity. This inversion reduces measurement points while maintaining assessment capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides a cost-effective and reliable means to assess structural integrity by using fewer sensors and simpler systems, enabling the detection of damage through changes in bending stiffness, applicable to various infrastructural elements like bridges, quay walls, and roadways.
Implementation Method 1
measuring deformations, such as displacements or rotations, during a predetermined time period with deformation measurement means arranged at or near a main structural body
Implementation Method 2
calculating the bending stiffness (EI) of the main structural body over the course of the predetermined time period, from the load configuration and deformations measured by the deformation measurement means
Data Source
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AI summary
The invention relates to a method for determining the structural integrity of an infrastructural element, comprising the steps of: -measuring deformations, such as displacements or rotations, during a predetermined time period with deformation measurement means arranged at or near a main structural body of the infrastructural element, in particular supports of the main structural body, characterized by -determining the load configuration of the main structural body over the course of the predetermined time period, such as the load configuration concerning the loading perpendicular to a longitudinal direction of the main structural body, -calculating the bending stiffness (EI) of the main structural body over the course of the predetermined time period, from the load configuration and deformations measured by the deformation measurement means, and -comparing the bending stiffness (EI) at the end of the predetermined time period to the bending stiffness (EI) at the start of the predetermined time period to establish a difference in bending stiffness (EI) over the course of the predetermined time period.