Joint Connection Reducing Beam Deformation via Reverse Bending Moment
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Solution Overview
Problem
Existing building structures face challenges in minimizing deformation at column base joints and beam ends, particularly in large span applications, where traditional methods either require large cross-sectional beams or complex structures to reduce deformation, leading to increased weight and complexity.
Innovation Solution
A joint connection system utilizing a combination of rods with varying intervals and coupling members to generate a bending moment in a reverse direction, allowing for minimal geometric movement and deformation, thereby reducing the overall deformation of the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a beam of large cross section is used to reduce bending deformation in large span applications, then bending deformation is reduced, but the beam weight and size increase significantly
Solution Approach 1:
The beam is divided into multiple segments (beam end portions) that are connected through supporting means. Each segment can be optimized independently, and the connection system distributes the bending forces, allowing the use of smaller cross-sectional elements while maintaining overall structural stability and reducing total weight.
Solution Approach 2:
The invention introduces a new dimensional approach by adding supporting means that extend from the beam end to a lateral structure (column or foundation). This creates a three-dimensional load distribution system that reduces bending deformation without requiring increased beam cross-section, effectively solving the problem in a different spatial dimension.
2Weight of moving object
If a trussed structure or lattice structure is used to convert bending force to axial force, then beam weight is reduced, but structural complexity increases
Solution Approach 1:
The supporting means acts as an intermediary element between the beam end and the lateral structure. It transfers and distributes forces in a simplified manner compared to complex trussed or lattice structures, reducing bending moments through a straightforward mechanical connection that involves fewer components and simpler geometry.
3Volume of moving object
If prestress is applied to reduce beam cross-section, then beam size is reduced, but the complexity of the connection system increases
Solution Approach 1:
The invention extracts the function of reducing bending deformation from the beam itself and relocates it to the connection system between the beam end and the lateral structure. This allows the beam to maintain a smaller, more economical cross-section while the supporting means handles the bending moment resistance, separating the structural functions for optimal design.
4Stability of the object's composition
If a rigid joint connection is used at column base to minimize deformation, then deformation is reduced, but the complexity of the joint increases
Solution Approach 1:
The supporting means provides a dynamic connection system that can accommodate small geometric movements within elastic ranges while still effectively reducing deformation. The system allows for controlled flexibility through the arrangement of rods and coupling members, achieving deformation reduction without requiring a fully rigid and complex joint configuration.
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
This solution effectively minimizes deformation at column base joints and beam ends by balancing bending moments, allowing for smaller cross-sectional elements and reduced weight while maintaining structural integrity, even in large span applications.
Implementation Method 1
deformation due to a very small geometric movement within a resilient range is generated in the supporting means by a reaction force generated at a joint portion with the other structure due to an external force exerting on a beam or a column
Implementation Method 2
deformation due to a very small geometric movement within a resilient range is generated in the supporting means
Data Source
AI summary
A joint connection (20) in which a beam end and a column base of a structure (10), or a peripheral member rigidly joined thereto, are joined to another structure (13) capable of receiving a bending moment through supporting means 22. A deformation due to a very small geometric movement within a resilient range is generated in the supporting means (22) by a reaction force generated at a joint portion with the other structure 13 due to an external force exerted on a beam or a column. This structure is capable of generating a bending moment Mr in a reverse direction to a bending moment Mc generated in the column base or the beam end.