Thermal Insulating Component for Cantilever Slab Connections
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Solution Overview
Problem
Thermal bridges form when steel pressure elements, essential for static load transfer, conduct thermal energy disproportionately, leading to heat losses and potential condensation issues in building connections.
Innovation Solution
Integration of shear reinforcement with pressure elements made of hardening material, such as a mixture of mineral aggregate and cement- or polymer-based binder, which conducts heat less than steel, along with a design that includes a cylindrical overhang for shear force absorption and optimized cross-sectional areas for reduced heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If steel pressure elements are used for load transfer, then static load transfer capability is improved, but thermal insulation performance deteriorates due to heat conduction
Solution Approach 1:
The patent extracts the thermal conduction function from the pressure element by removing steel and replacing it with hardening material that has lower thermal conductivity. This separates the structural load-bearing function from the thermal insulation function, allowing the pressure element to maintain strength while reducing heat transfer to the building structure.
Solution Approach 2:
The patent changes the material parameter of the pressure element from high thermal conductivity (steel) to low thermal conductivity (hardening material with mineral aggregate and cement or polymer binder). This parameter change reduces the thermal bridge effect while maintaining the compressive strength necessary for load transfer through optimized material composition and curing processes.
2Strength
If shear reinforcement is integrated into the component, then shear force transfer is improved, but thermal insulation performance deteriorates due to additional thermal bridge
Solution Approach 1:
The patent extracts the shear reinforcement from the component to be connected, eliminating it as a thermal bridge. Instead, shear forces are introduced directly into the pressure element through the overhang design, where the shear reinforcement is firmly integrated only into the pressure element made of hardening material, not into the external component, thus maintaining thermal insulation while preserving shear transfer capability.
Solution Approach 2:
The pressure element acts as an intermediary that receives shear forces from the component via the overhang and transfers them to the building structure. The shear reinforcement serves as a mediator within the pressure element, connecting the overhang to the structure without creating a direct thermal bridge from the external component to the structure.
3Strength
If pressure element cross section is increased for better load bearing, then load transfer capability is improved, but thermal bridge effect worsens due to larger heat transfer area
Solution Approach 1:
The patent uses composite hardening material consisting of mineral aggregate and cement or polymer binder, which provides high compressive strength-to-volume ratio. This composite material allows the pressure element to achieve necessary load-bearing capacity with optimized cross-sectional dimensions, minimizing the thermal bridge area while maintaining structural integrity through the composite's inherent strength properties.
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
Significantly reduces heat losses in the connection area, enhances the thermal insulation effect, and eliminates the shear reinforcement as a thermal bridge, while maintaining static load transfer capabilities.
Implementation Method 1
The hardening material conducts heat to a much lesser extent than pressure elements made of steel, so that with a component according to the invention, heat losses in the connection area to the structure are significantly lower.
Implementation Method 2
This can be achieved in a simple manner by casting, with the composite effect between the shear force reinforcement and the pressure element occurring without additional effort as the hardening material hardens.
Data Source
Figure 1~3
Figure 4~6
Figure 7~8
AI summary
The invention relates to a thermally insulating component (1) for the force-transmitting connection of a component (3) to a building structure (2), in particular a cantilever slab to a building ceiling or building wall. The component (2) has an insulating body (4) for arrangement between the component (3) and the building structure (2), the first outer surface (6) of which is designed to abut the component (3) and the second outer surface (7) of which is designed to abut the building structure (2). The first outer surface (6) and second outer surface (7) are subdivided into a tension zone and a compression zone. Within the insulating body (4), a compression element (8, 8', 8"), which is arranged in the region of the compression zone, and a shear reinforcement (11), which extends diagonally from the tension zone of the second outer surface (7) towards the compression zone of the first outer surface (6), extend from the first outer surface (6) to the second outer surface (7).According to the invention, for improved load transfer and thermal insulation, it is proposed that the pressure element (8, 8', 8") consists of a hardenable material into which the shear reinforcement (11) is bonded with its end section (20).