Composite Tensile Reinforcement for Thermal Insulation Anchoring
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Solution Overview
Problem
Existing thermal insulation components with plastic tensile reinforcement elements face anchoring challenges due to material differences and thermal expansion issues between plastic and concrete, leading to installation problems and material fatigue, and lack the flexibility to accommodate temperature-related movements.
Innovation Solution
The use of multi-part composite tensile reinforcement elements with a central rod section made of fiber-reinforced plastic for thermal insulation and a separate anchoring rod section made of reinforcing steel, featuring a radial support element or radial support area to ensure secure anchoring and flexibility, allowing for alignment and indirect fixation to transmit tensile forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If tensile reinforcement elements are made from plastic material (glass fiber reinforced plastic), then cost is reduced and thermal conductivity is lowered, but anchoring in adjacent components becomes difficult requiring transverse plates or loops
Solution Approach 1:
The tensile reinforcement element is divided into two distinct sections: a central rod section made of fiber-reinforced plastic material for thermal insulation, and anchoring rod sections made of different material (steel or concrete-compatible material) for effective anchoring. This segmentation allows each section to be optimized for its specific function without compromise.
Solution Approach 2:
Different material properties are applied to different parts of the tensile reinforcement element. The central section uses fiber-reinforced plastic for low thermal conductivity, while the anchoring sections use materials with properties suitable for bonding with concrete or structural elements. This local differentiation resolves the contradiction between thermal insulation and anchoring effectiveness.
2Reliability
If loop shape is used for tensile reinforcement elements, then positive connection with adjacent structural element is achieved, but installation problems occur due to collisions with connecting reinforcement
Solution Approach 1:
Instead of using a loop shape that requires navigation around connecting reinforcement, the reinforcement element is segmented into a straight central section and separate anchoring sections. This eliminates the collision problem with connecting reinforcement while maintaining anchorage capability through the specialized anchoring rod sections.
3Reliability
If ribbed profile is provided on plastic tensile reinforcement elements, then anchoring in adjacent component is improved, but different thermal expansion coefficients cause stresses and strains leading to failure
Solution Approach 1:
The anchoring rod sections are made from materials with thermal expansion coefficients compatible with the adjacent concrete or structural elements, while the central section uses fiber-reinforced plastic for thermal insulation. This local material differentiation eliminates thermal expansion compatibility issues at the anchoring interfaces while maintaining thermal insulation properties in the central section.
Solution Approach 2:
The tensile reinforcement element is constructed as a composite structure with different materials in different sections: fiber-reinforced plastic for the central insulation section, and materials with appropriate thermal expansion properties for the anchoring sections. This composite approach allows optimization of each section for its specific functional requirements.
4Loss of energy
If stainless steel is used for tensile reinforcement elements, then corrosion resistance and low thermal conductivity are achieved, but cost increases significantly
Solution Approach 1:
Instead of using expensive stainless steel throughout the entire reinforcement element, only the central section requires low thermal conductivity and is made of fiber-reinforced plastic. The anchoring sections use less expensive materials appropriate for their function, significantly reducing overall cost while maintaining thermal insulation performance.
Solution Approach 2:
The reinforcement element uses a composite construction combining fiber-reinforced plastic for thermal insulation with more cost-effective materials for anchoring. This composite approach achieves the thermal insulation benefits of plastic materials while avoiding the high cost of stainless steel in sections where it is not strictly necessary.
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 solution allows for the selection of materials based on individual advantages, providing improved anchoring, reduced material fatigue, and enhanced flexibility to accommodate temperature-related movements without the need for end anchorages like transverse plates, thus overcoming previous limitations in thermal insulation components.
Implementation Method 1
the insulating body is responsible for thermally insulating the two components from each other
Implementation Method 2
the anchoring rod section and the central rod section being arranged substantially in alignment with each other and fixed to each other at least indirectly
Data Source
Figure 1
Figure 2~2a
Figure 3~3a
AI summary
A building element for thermal insulation between two building components, in particular between a building (A) and a projecting outer part (B), consisting of an insulating body (2) to be arranged between the two building components and of reinforcement elements in the form of at least tensile reinforcement elements (3), which in the installed state of the building element (10) run substantially horizontally and transversely to the substantially horizontal longitudinal extent of the insulating body through it and each project horizontally towards the insulating body and can be connected to one of the two building components, which are preferably made of concrete.In this case, the tensile reinforcement elements (3) are designed as multi-part composite elements in that they have at least in the area of the insulating body (2) a central bar section (3a) made of fiber-reinforced plastic material and in an area outside the insulating body (2) a separate anchoring bar section (3b) with geometric and/or material properties that differ at least partially from the central bar section (3a), wherein the anchoring bar section (3b) and the central bar section are arranged essentially in alignment with each other and are fixed to each other at least indirectly, and wherein the anchoring bar section (3b) cooperates with an internal anchoring element for fixing to the central bar section (3a), which engages in a radial inner area of the central bar section.The central rod section (3a) has on its radial outer side an annular radial support element and/or a radial support area (3ab) with fibers (3f) extending at least partially in the circumferential direction of the central rod section (3a), wherein the inner anchoring area (3v) and the radial support area (3ab) overlap at least partially radially.