End-Embedded Girder Joint Structure for Faster Composite Frame Assembly
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Solution Overview
Problem
Conventional reinforced concrete construction methods face challenges such as lengthy construction periods, non-uniform quality, high labor requirements, safety risks, and inefficient joining processes, particularly in large structures, due to on-site formwork installation and complex beam-column joint connections.
Innovation Solution
A composite frame with an end-embedded girder joint structure using pre-assembled steel frame assemblies, where a girder body is inserted into U-shaped bracket assemblies coupled to column assemblies and integrated with concrete pouring, simplifying the construction of a steel-concrete composite structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional RC construction method with on-site formwork installation is used, then flexibility in construction is maintained, but construction period is extended and labor requirements increase
Solution Approach 1:
The formworks are pre-attached to the pre-assembled column frame at the factory before delivery to the construction site. This preliminary action eliminates on-site formwork installation and disassembly work, significantly reducing construction time and labor requirements while maintaining construction flexibility.
2Strength
If rigid connection method with welding or bolting is used for beam-column joints, then structural strength is improved, but joining time is extended and quality control becomes difficult
Solution Approach 1:
The bracket assemblies are pre-assembled with steel section members and connecting bars at the factory, forming integrated U-shaped structures. This preliminary assembly eliminates on-site welding or bolting operations, significantly reducing joining time while maintaining joint strength through the pre-fabricated rigid connections.
Solution Approach 2:
The bracket assembly merges the formwork support function with the beam-column joint connection function into a single integrated component. The U-shaped bracket assembly simultaneously serves as the joint connector and the formwork support structure, eliminating separate joining operations and reducing construction time.
3Productivity
If pre-assembled bracket assemblies with U-shaped structure are used, then beam-column joint construction is simplified and speeded up, but structural complexity increases
Solution Approach 1:
The U-shaped bracket assembly serves multiple functions: it acts as the beam-column joint connector, provides formwork support, and serves as the mold for concrete pouring. This multi-functionality simplifies the overall construction process despite the increased complexity of the bracket assembly itself, as it eliminates the need for separate formworks and joining operations.
Data Source
AI summary
The present invention relates to a composite frame having an end-embedded girder joint structure, wherein a girder body is simply placed in a U-shaped preassembled bracket assembly coupled to the upper end of a preassembled column assembly and, then, concrete is poured into and integrated with the assembly such that the composite frame can reduce a construction period and improve quality at the time of forming a steel-composite ferroconcrete structure and enable simple and rapid building of a beam-column joint, thereby securing the constructability and stability thereof.