Modular Bridge Joint Design for Weight Reduction
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Solution Overview
Problem
Conventional bridges face challenges in reducing weight while maintaining load capacity and deck space, which increases transportation and construction costs and limits site accessibility due to their heavy components and lack of modularity.
Innovation Solution
A lightweight bridge joint design featuring a first beam with a channel and a second beam inserted through it, secured by welding along the interior surfaces, allowing for a resilient and modular structure using conventional materials like rectangular steel tubes, reducing the need for overlapping beams and additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional bridge designs use traditional beam connection methods with overlapping beams and additional components, then structural integrity is maintained, but weight increases and modularity is reduced
Solution Approach 1:
The bridge structure is divided into modular beam units with standardized channels that can be independently manufactured and assembled. Each beam contains integrated channels for connections, eliminating the need for separate connection components and reducing overall weight while maintaining structural integrity through modular assembly.
Solution Approach 2:
The connection functionality is merged directly into the beam structure by integrating channels within the beam bodies. This eliminates the need for separate overlapping beams and additional connection components, reducing weight while maintaining the structural strength required for load-bearing capacity.
2Strength
If bridge components are made heavier to increase load capacity, then load bearing capacity improves, but transportation costs and construction complexity increase
Solution Approach 1:
The bridge is segmented into standardized modular components that can be manufactured independently and transported efficiently. The integrated channel design allows for optimized material distribution that maintains load-bearing capacity while reducing unnecessary weight, making components easier to transport and assemble.
Solution Approach 2:
The beam cross-sectional geometry is optimized with integrated channels that strategically distribute material to maximize load-bearing capacity per unit weight. This parameter optimization allows components to maintain required strength while being lighter and easier to manufacture and transport.
3Adaptability or versatility
If traditional bridge designs are used with non-modular components, then structural continuity is achieved, but adaptability to different sites and pre-fabrication capabilities are reduced
Solution Approach 1:
The bridge structure is segmented into modular beam units with standardized channels that ensure continuous load paths while allowing for pre-fabrication and easy adaptation to different site conditions. The modular design maintains structural continuity through standardized connection interfaces.
Solution Approach 2:
The standardized channel design provides universal compatibility across all beam components, enabling the same modular units to be adapted to various bridge configurations and site requirements while maintaining structural continuity and integrity throughout the assembly.
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 design achieves significant weight reduction, enhanced structural integrity, and cost savings by enabling easier transport and assembly, allowing for larger or more capable bridges to be constructed within cost constraints, and can be applied to various load-bearing structures.
Implementation Method 1
The exterior surfaces of the second beam are connected to edges of the first channel
Data Source
AI summary
A joint for a support structure comprises a first beam having a first channel defined therein and a second beam inserted through the first channel of the first beam. The exterior surfaces of the second beam are connected to edges of the first channel.