Insulating Body Projection for Shear Force Bar Anchoring
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Solution Overview
Problem
Conventional thermal insulation components with an 8 cm thick insulating body are insufficient for passive houses, leading to compromised static properties or impaired insulation when trying to accommodate thicker insulation requirements, as the optimal angle of shear force bars is compromised with increased thickness.
Innovation Solution
An insulating body with a projection on the load-bearing side that creates recesses for the upper course of shear force rods, allowing the insulating body to be thickened to over 15 cm while maintaining the optimal 45° orientation of shear force bars and ensuring static support by surrounding them with concrete, thereby enhancing both thermal and static performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the insulating body thickness is increased to meet passive house requirements (20 cm), then thermal insulation performance is improved, but the static properties deteriorate because shear force bars cannot maintain optimal 45° orientation
Solution Approach 1:
The patent introduces a projection extending from the insulating body in the direction of the load-bearing component, creating a three-dimensional structural addition. This projection provides a new spatial dimension for concrete anchoring, allowing shear force bars to maintain their optimal 45° inclination while the overall insulation thickness increases to 20 cm. The projection effectively adds vertical dimension to the anchoring system without compromising the horizontal insulation thickness.
Solution Approach 2:
The projection is equipped with recesses specifically at locations where shear force bars exit the insulating body. These recesses create localized concrete anchoring zones only where needed for structural support, rather than uniformly throughout the entire insulating body. This localized approach maintains optimal shear force bar orientation in critical areas while preserving thermal insulation performance in non-critical areas.
2Loss of energy
If the insulating body thickness is increased beyond 8 cm, then thermal insulation performance is improved, but the connection reliability between components deteriorates due to insufficient concrete support for shear force bars
Solution Approach 1:
The projection with its recesses is pre-formed as part of the insulating body structure before installation. This preliminary preparation ensures that when concrete is poured, it automatically fills the recesses and provides immediate anchoring support for the shear force bars. The anchoring structure is prepared in advance, eliminating the need for post-installation modifications and ensuring reliable connection from the outset.
Solution Approach 2:
The projection acts as an intermediary element between the insulating body and the load-bearing component. It provides a transition zone where concrete can be anchored to both the load-bearing component and the insulating body, creating a reliable mechanical connection. The projection mediates the force transfer between components while maintaining the thermal insulation integrity of the main insulating body.
3Strength
If shear force bars are installed at optimal 45° angle, then static properties are improved, but insulating body thickness must be limited to around 8 cm
Solution Approach 1:
The projection extends in the vertical direction toward the load-bearing component, creating an additional dimensional space for concrete anchoring. This vertical extension allows shear force bars to maintain their 45° inclination angle while the overall insulation thickness increases. The projection effectively decouples the relationship between bar inclination angle and insulation thickness by providing a three-dimensional anchoring volume.
Data Source
Figure 1~2
AI summary
The component has an insulating body that is to be arranged between two parts, and a transverse force rods provided as armoring units. The body has a protrusion (3) on a side that faces a supporting part, and the protrusion has recesses (7) for the exit region of the upper progression of the rods. The protrusion extends in the direction of the supporting parts till the region of the horizontally protruding transverse force rod sections to completely laterally overlap the bent rod sections. The recesses are filled by concrete such that the concrete surrounds the bent rod sections.