Rotating Connecting Fitting for C-Section Steel Frame Reinforcement
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Solution Overview
Problem
Conventional connecting fittings for C-section steels in building frames face challenges in attaching between the flanges due to the narrower spacing between lips, resulting in a weaker reinforcement effect as the fitting either cannot pass between the lips or creates a gap, compromising the structural integrity.
Innovation Solution
A connecting fitting with an insertion section that can be rotated to abut the inner surfaces of the C-section steel flanges, allowing it to be inserted between the lips and providing a joining section that reinforces the frame by distributing load effectively, thereby enhancing the structural support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the section-steel jointing fitting is made smaller to pass between the lips of C-section steel, then the fitting can be inserted between the lips, but a gap is created between the flanges and the fitting, reducing the reinforcement effect
Solution Approach 1:
The connecting fitting is divided into two functional sections: an insertion section with width smaller than the lip spacing to enable passage between lips, and an abutting section with width equal to or larger than the flange spacing to provide full contact with flanges for reinforcement. This segmentation allows the fitting to satisfy both insertability and reinforcement requirements through rotational transformation from insertion attitude to attachment attitude.
2Strength
If the section-steel jointing fitting is made to contact both flanges for reinforcement, then the reinforcement effect is achieved, but the fitting cannot pass between the narrower lips of C-section steel
Solution Approach 1:
The connecting fitting is designed as a dynamic structure that can rotate from an insertion attitude to an attachment attitude. In the insertion attitude, the insertion section has reduced width for passing between lips. After insertion, the fitting rotates so that the abutting section comes into contact with the flanges, transforming from a compact insertion configuration to a fully engaged reinforcement configuration.
3Adaptability or versatility
If a conventional connecting fitting is used for C-section steel, then the fitting can be attached to H-section steel, but the narrower spacing between lips of C-section steel prevents proper attachment
Solution Approach 1:
The connecting fitting is designed with dual functionality: the abutting section is sized to contact flanges of both H-section steel and C-section steel, providing universal compatibility. The insertion section is specifically designed with reduced width to pass between the narrower lips of C-section steel. This multi-functional design allows a single fitting type to serve both H-section and C-section steel applications.
Data Source
AI summary
The connecting fitting comprises a band-like section 14 and a back plate 11 that can be inserted between the flanges 7b, 7c by passing between lips 7d, 7e, in an insertion attitude, and a joining section 15 that can join a beam 5E in a state where the band-like section 14 and the back plate 11 are inserted between the flanges 7b, 7c. The band-like section 14 has a pair of abutting sections 14b, 14c that can abut respective inner surfaces of both flanges 7b, 7c of a C-section steel 7, in an attachment attitude resulting from rotation from the insertion attitude by a predetermined angle.