Thermal Break for Concrete Slabs with Angled Shear Bars
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Solution Overview
Problem
Concrete slabs that overhang building structures are inefficient in thermal insulation, allowing heat to escape or enter, due to lack of effective thermal breaks, with existing solutions increasing complexity through additional components like articulation elements and compression struts.
Innovation Solution
A thermally insulating structural foam barrier with angled reinforcing shear rod holes and rods, secured with washers, that separates interior and exterior concrete slabs, eliminating the need for compression struts and articulating elements, and providing structural integrity with embedded reinforcing bars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If additional components such as articulation elements or face plates are used to pass transverse force bars through the insulating barrier, then structural integrity is improved, but device complexity increases
Solution Approach 1:
The patent removes unnecessary intermediate components (articulation elements, face plates) from the system, keeping only the essential insulating barrier and reinforcing bars. The reinforcing bars directly penetrate the insulating barrier without requiring additional articulation elements or face plates, thereby maintaining structural integrity while significantly reducing installation complexity.
Solution Approach 2:
Instead of passing bars through complex articulation elements and face plates as in conventional solutions, the patent inverts the approach by having the reinforcing bars directly penetrate the insulating barrier. This simplification maintains structural functionality while eliminating unnecessary complexity in the connection system.
2Loss of energy
If a thermal insulating barrier is introduced between interior and exterior concrete slabs, then thermal insulation is improved, but structural complexity increases
Solution Approach 1:
The patent merges the thermal insulation function and structural reinforcement function into a single integrated system. The insulating barrier with embedded reinforcing bar holes simultaneously provides thermal isolation and structural connectivity, eliminating the need for separate articulation elements or face plates that would add structural complexity.
Solution Approach 2:
The insulating barrier is designed to perform multiple functions: thermal insulation (R-value ≥ 2), structural reinforcement support, and direct connection medium for reinforcing bars. This multi-functionality reduces the need for additional specialized components, thereby reducing overall structural complexity while maintaining effective heat transfer prevention.
3Strength
If transverse force bars pass through the insulating barrier, then structural connectivity is improved, but thermal insulation performance deteriorates
Solution Approach 1:
The patent applies local quality by providing thermal insulation throughout the insulating barrier while allowing localized openings for reinforcing bars. The barrier maintains its insulating properties in all areas except where bars penetrate, and the bars themselves are minimized in diameter and number to reduce thermal bridging effects while maintaining necessary structural connectivity.
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
The solution provides a simple, effective thermal break system that reduces heat transfer between interior and exterior concrete slabs, maintaining structural integrity while minimizing installation complexity and material usage.
Implementation Method 1
a thermally insulating structural foam barrier with angled reinforcing shear rod holes and rods, secured with washers, that separates interior and exterior concrete slabs
Data Source
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AI summary
A thermal break system for cast-in-place concrete slabs is provided that includes a load-bearing structural foam barrier designed to separate an interior portion of concrete slab from an exterior portion of concrete slab. The thermal break system includes a plurality of reinforcing tension bars holes passing through the insulating barrier. In addition, reinforcing shear bars are inserted through the insulating foam at a non-horizontal angle and bent such that the shear bars are horizontal on either side of the insulating barrier.