Punching Shear Reinforcement with Integrated Anchor and Truss Elements
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Solution Overview
Problem
Concrete structures are prone to punching shear, where the concrete cover near a support area is at risk of tearing off, leading to potential collapse, and existing reinforcement methods either require additional components or have decreasing strength with radial distance from the column.
Innovation Solution
A punching shear reinforcement system comprising elongated anchor elements aligned transversely to the ceiling surface, combined with rigid upright shear reinforcement elements, such as metal sheets, forming a truss-like structure that increases shear resistance and compressive strength, with anchor elements that can be connected or welded for enhanced reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional punching shear reinforcement methods are used, then shear resistance is improved, but the strength decreases with radial distance from the column and additional components are required
Solution Approach 1:
The invention combines multiple punching shear reinforcement elements into a single integrated component that includes both the anchor element and the shear reinforcement element as one piece, eliminating the need for separate components and simplifying the reinforcement system while maintaining shear resistance
Solution Approach 2:
The reinforcement element is divided into functionally distinct sections: an anchor portion for securing to the support and a shear reinforcement portion for providing punching shear resistance, allowing each section to be optimized for its specific function while being part of a unified component
2Area of stationary object
If anchor elements are arranged radially with decreasing strength, then coverage area is improved, but strength at outer regions is insufficient
Solution Approach 1:
The shear reinforcement element features variable geometry with different section properties at different locations, providing increased reinforcement at regions where punching shear stresses are highest while maintaining adequate coverage area, thereby addressing the strength deficiency at outer regions
3Strength
If multiple separate reinforcement elements are used, then reinforcement effectiveness is improved, but processing and installation difficulty increases
Solution Approach 1:
By integrating the anchor element and shear reinforcement element into a single monolithic component, the invention maintains the effectiveness of multiple reinforcement functions while dramatically simplifying manufacturing, handling, and installation processes compared to assembling multiple separate elements
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3D
AI summary
The arrangement has a set of anchor elements (14) concreted at a distance to each other in a local zone for supporting ceiling areas in a ceiling and oriented transverse or diagonally bent to a ceiling surface. The anchor elements are aligned along a shear reinforcement element (12), where the anchor element is designed as twin-headed anchor. The shear reinforcement element is designed as metal strips or strut elements that are inclinedly arranged at an angle in an extending direction of the anchor elements.