Column Beam Connection Outer Diaphragms
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Solution Overview
Problem
Conventional column-beam connection methods using inner diaphragms require excessive welding, increasing complexity and cost, while outer diaphragms complicate the structure and pose transportation challenges due to their large size.
Innovation Solution
A connection structure utilizing outer diaphragms connected to the column at different heights, with end plates and bolts parallel to the beam's longitudinal direction, allowing for easy assembly outside the column and efficient stress transfer without special metal fittings or inner diaphragms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If inner diaphragms are used to connect beams to columns, then stress transfer efficiency is improved, but welding complexity and workability deteriorate due to excessive welding required inside the column
Solution Approach 1:
The patent inverts the conventional approach by moving the diaphragms from inside the column to the outside surface. Instead of welding diaphragms internally as in conventional methods, the invention welds diaphragms to the external surface of the column, allowing beam connection plates to be welded to these external diaphragms. This inversion eliminates the need for complex internal welding operations while maintaining stress transfer efficiency.
2Adaptability or versatility
If column-beam connecting metal fittings with special structures are used, then connection functionality is improved, but material mass and cost increase
Solution Approach 1:
The patent segments the connection system into separate functional components: external diaphragms welded to the column, beam connection plates welded to the diaphragms, and bolts for final assembly. This segmentation replaces the need for complex integrally-formed special metal fittings, using instead simple plate and bolt components that are easier and more economical to manufacture and assemble.
3Ease of operation
If large-sized outer diaphragms are used for external connection, then workability outside the column is improved, but transportation difficulty increases due to large size
Solution Approach 1:
The patent divides the outer diaphragm into multiple separate diaphragms, each sized to fit practical transportation requirements. These segmented diaphragms are welded to different portions of the column's external surface, providing adequate connection functionality while maintaining manageable dimensions for transportation and installation.
4Strength
If through diaphragms or inner diaphragms are used, then stress transfer is improved, but manufacturing complexity increases due to advance factory connection requirements
Solution Approach 1:
The patent inverts the conventional manufacturing sequence by placing diaphragms on the external surface of the column rather than inside. This allows the diaphragms to be welded to the column externally, and the beam connection plates to be subsequently welded to these diaphragms, simplifying the manufacturing process and eliminating the need for complex advance factory assembly operations.
Data Source
AI summary
A pair of outer diaphragms (3a), (3b) is connected to a column (5). The outer diaphragms (3a) and (3b) include female screws (15) formed in a direction so as to be put between an end plate (13a) and the column (5). The end plate (13a) is connected by welding to the end faces of an upper flange part (11a), a lower flange part (11b), and the web of a beam (9a). On upper and lower projecting parts of the end plate (13a), bolt holes 17 are formed at the positions that correspond to the female screws (15) of the outer diaphragms (3a) and (3b). The bolts (7), which are in a direction parallel to the longitudinal direction of the beam (9a), connect the end plate (13a) to the outer diaphragms (3a) and (3b).