U-Shaped Composite Steel Beam Bracket Connection
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Solution Overview
Problem
Conventional steel composite beam manufacturing is complicated, leading to increased manufacturing and construction costs, and structural inefficiencies due to complex shapes and different sectional dimensions between girders and beams, which hinder efficient connection methods.
Innovation Solution
A steel frame structure using U-shaped composite beams with brackets and beam connectors that allow for simple assembly by bending single steel plates, ensuring consistent depth and easy connection between columns, girders, and beams, reducing manufacturing costs and facilitating stable construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two L-shaped steel plates are integrated by welding to form a U-shaped permanent mold, then the composite beam structure is formed, but the manufacturing process becomes complicated requiring bending, cutting and welding
Solution Approach 1:
The steel plate is divided into multiple sections (first steel plate section forming the U-shape, second steel plate section forming the cover) that are separately formed and then connected, avoiding the need to bend and weld a single complex piece into a U-shape
2Strength
If the top flange is formed over the whole length of the web, then the beam structure is complete, but the quantity of steel materials increases causing high production costs
Solution Approach 1:
The top flange is selectively positioned only where needed (at the end portion in the negative moment region) rather than extending over the whole length of the web, reducing steel material quantity while maintaining beam strength through strategic placement
3Reliability
If through-holes are formed on the web to improve composition effects, then the concrete-steel integration is enhanced, but the shape of the web section becomes complicated increasing cutting processes and production costs
Solution Approach 1:
The web connection is achieved through segmented approaches using mounting plates and angle bars at specific locations rather than requiring through-holes across the entire web, simplifying the web section shape while still achieving concrete-steel integration
4Strength
If different sectional dimensions are used for girders and beams, then the structural design is optimized, but the connecting way becomes different from existing steel structure methods increasing construction complexity
Solution Approach 1:
The bracket connection structure serves multiple functions: it connects the girder to the column, provides a standardized interface for beam connections, and maintains consistent depth dimensions that allow existing steel structure connecting methods to be used, achieving universality across different connection types
Data Source
AI summary
A steel frame structure includes brackets connected to columns to allow the columns to be connected to a girder. Each bracket includes a U-shaped plate having a bottom plate, side plates extended upwardly perpendicularly from both ends of the bottom plate, and base plates extended outwardly from the side plates, a vertical plate welded perpendicularly to the center of the bottom plate of the U-shaped plate in such a manner as to be parallel to the side plates, and a horizontal plate welded to the top end of the vertical plate in such a manner as to be parallel to the bottom plate of the U-shaped plate. The girder has a generally U-shaped section.