L-Shaped Shear Reinforcement Element for Concrete Punching Shear
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shear reinforcement methods for reinforced concrete and prestressed concrete components require long, inclined brackets that are difficult to install, leading to high material consumption and inefficiencies, particularly when using reinforcement meshes, as they necessitate large free spaces and manual handling, which is labor-intensive and often impractical.
Innovation Solution
A shear reinforcement element featuring short, position-secured brackets with a flat component design that includes a feed area with a large angular range for easy bracket installation, allowing for vertical or near-vertical alignment, reducing the need for extensive free spaces and minimizing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If long, inclined brackets are used for shear reinforcement, then the brackets can be manually installed by pulling, but the material consumption increases and installation becomes more complex
Solution Approach 1:
Instead of pulling the bracket into the recess (prior art), the invention inverts the installation mechanism by pressing the bracket from the recess outward. The pressing direction is opposite to the traditional pulling direction, which eliminates the need for long inclined brackets and reduces material consumption while simplifying the installation process
Solution Approach 2:
The invention changes the installation parameter from tensile force (pulling) to compressive force (pressing). This parameter change allows the bracket to be installed vertically or near-vertically without requiring the large horizontal free spaces needed for manual pulling, thereby reducing material consumption and simplifying installation
2Ease of operation
If long, inclined brackets are used for shear reinforcement, then manual handling is possible, but the installation process becomes labor-intensive and complex
Solution Approach 1:
The invention inverts the traditional installation approach by using a pressing mechanism instead of pulling. This reversal simplifies the installation process by eliminating the need for complex manual handling operations and reduces the overall complexity of the installation process
Solution Approach 2:
The invention extracts the complex manual handling requirements by designing a pressing mechanism that simplifies bracket installation. The pressing direction is perpendicular to the bracket axis, which eliminates the need for complex angular positioning and manual manipulation required in traditional pulling methods
3Loss of substance
If vertical or near-vertical brackets are used, then material consumption is reduced, but the feed area requires large angular range for easy installation
Solution Approach 1:
The invention changes the installation dimension from horizontal pulling to vertical pressing. By orienting the pressing force perpendicular to the bracket axis, the system utilizes a different dimensional approach that enables vertical bracket placement while maintaining ease of installation through the large angular range of the feed area
4Productivity
If reinforcement meshes are used, then installation efficiency improves, but traditional bracket designs cannot accommodate them due to lack of free space
Solution Approach 1:
The invention inverts the traditional bracket installation approach, enabling compatibility with reinforcement meshes. By using a pressing mechanism instead of pulling, the design eliminates the need for large horizontal free spaces, thereby adapting to the constrained environment of reinforcement meshes while maintaining installation efficiency
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
The invention relates to L-shaped sheet metal parts 21 with an angled longitudinal recess 23 and to a reinforced/prestressed concrete component with at least one upper and at least one lower longitudinal reinforcement layer and shear reinforcement extending over the uppermost and lowermost longitudinal reinforcement layers, which is formed from the L-shaped sheet metal parts 21 according to the invention with stirrups 30 fastened in the longitudinal recess 23. The reinforced/prestressed concrete component according to the invention is suitable for increasing the punching shear strength in the area of ceiling columns of flat slabs.