Y-Shaped Connector for Multi-Row Polygonal Arch Stability
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Solution Overview
Problem
Current designs for double row or larger polygonal arches face challenges in structures with spans over 40 feet, requiring public load safety, easy dismantling, use of locally available materials like bamboo, and assembly without heavy equipment or scaffolding, especially for non-professionals.
Innovation Solution
A Y-shaped structural connector that joins three straight beams in a triangular union, forming a node for the arch structure, allowing for the creation of double row or multi-row polygonal arches using identical connectors, made of sheet metal or steel, enabling assembly without scaffolding and using various beam materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If end-to-end alignment of beams is used in polygonal arches, then load transfer efficiency is improved, but structural stability deteriorates
Solution Approach 1:
The patent transitions from a single-row end-to-end beam alignment to a double-row staggered configuration. The second row of beams is offset by half a beam length relative to the first row, creating a two-dimensional staggered pattern. This dimensional change allows beams in one row to brace the joints of beams in the other row, simultaneously achieving stable joint connection and efficient load transfer along the longitudinal axis.
2Stability of the object's composition
If bracing is added to make single row beams rigid, then structural stability is improved, but cost increases and strength-to-weight ratio deteriorates
Solution Approach 1:
The patent merges the functions of load-bearing and structural bracing into a single integrated double-row configuration. The beams in the second row serve dual purposes: they carry load and simultaneously brace the joints of beams in the first row. This eliminates the need for separate bracing elements, reducing device complexity while maintaining structural rigidity.
3Strength
If traditional connectors are used for arch assembly, then assembly strength is improved, but assembly complexity and equipment requirements increase
Solution Approach 1:
The patent segments the arch structure into modular units where each node connects exactly three beams (two from one row, one from the other row). This segmentation creates standardized connection points that simplify assembly. The Y-shaped connector design further segments the joining function into discrete, pre-fabricated components that can be easily assembled without heavy equipment.
Solution Approach 2:
The Y-shaped connector acts as an intermediary element that mediates the connection between three beams. Instead of directly joining beams together which would require complex field welding or bolting, the Y-shaped connector provides a pre-engineered joining mechanism that simplifies the assembly process while maintaining joint strength.
Data Source
AI summary
The invention is a structural connector used as a component to construct an arch consisting of a plurality of closely adjacent, polygonal rows of stringer beams. The multiple row polygonal arch is a low-cost, general purpose support structure for bridges, shelters and arbors applicable to many cost-, time- or environmentally-sensitive situations. The invention is a Y-shaped connector, typically made of sheet metal, with three brackets, two upper brackets and a lower bracket, which collectively enable a union of three beams forming one node of the multiple row polygonal arch. Using these Y-shaped connectors to join the beams at each node creates the arch structure, and additionally provides the features of cantilevering, modularity, generic component shape, reusability and safety. The invention is applicable to a variety of structures such as: pedestrian and vehicular bridges, shelters, arbors, as well as jewelry, furniture and toys.