Prefabricated Beam-Column Joint with Transfer Members
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Solution Overview
Problem
Conventional prefabricated beam-column joints require complex welding processes for multiple steel bars, leading to slow construction progress and difficulties in ensuring welding quality due to long welding lengths and high difficulty.
Innovation Solution
A prefabricated reinforced concrete beam-column connecting structure that includes upper and lower prefabricated columns and a prefabricated beam, with transfer members and connecting slots for the beam main reinforcement, allowing for stable column connections and simplified beam-column joint assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional welding methods are used to connect multiple steel bars in prefabricated beam-column joints, then the joint strength can be ensured, but the construction progress becomes very slow and welding quality is difficult to ensure due to long welding length and high welding difficulty
Solution Approach 1:
The invention divides the column reinforcement bars into segments: some bars extend continuously through the joint (through-bars), while others are terminated at the column end and connected to beam bars using anchoring devices. This segmentation eliminates the need for welding multiple bars at the joint, significantly reducing construction time while maintaining joint strength through the combination of through-bars and anchoring connections.
Solution Approach 2:
The anchoring devices are pre-installed on the column reinforcement bars during prefabrication, and the beam reinforcement bars are pre-bent with anchoring ends. This preliminary preparation allows for quick mechanical connection at the joint without requiring complex welding operations during construction, thereby improving construction progress while ensuring reliable connections.
2Reliability
If multiple steel bars are welded at the beam-column joint, then the structural integrity can be achieved, but the on-site construction time is significantly extended due to the complexity and duration of welding operations
Solution Approach 1:
The invention replaces the welding mechanical system with a mechanical anchoring system. Instead of welding beam reinforcement bars to column reinforcement bars, the design uses anchoring devices that mechanically interlock the bars. This substitution eliminates time-consuming welding operations while maintaining structural integrity through proven mechanical anchoring mechanisms.
Solution Approach 2:
The invention extracts the welding operation from the beam-column joint construction process entirely. By using through-bars that extend through the joint and mechanical anchoring devices, the design removes the need for welding at the joint, thereby eliminating the time loss associated with welding operations while preserving structural integrity through alternative connection methods.
3Ease of manufacture
If traditional cast-in-place construction methods are used for beam-column joints, then the construction process is simple and familiar, but the construction period is extended and labor requirements increase
Solution Approach 1:
The invention segments the beam-column joint into prefabricated column components with pre-installed anchoring devices and prefabricated beam components with pre-bent reinforcement bars. This segmentation allows for parallel production of components in controlled factory environments, significantly reducing on-site construction time compared to traditional cast-in-place methods, while maintaining construction process simplicity through standardized assembly procedures.
Data Source
AI summary
A prefabricated reinforced concrete beam-column connecting structure and a construction method thereof are provided. The prefabricated reinforced concrete beam-column connecting structure includes an upper prefabricated column, a lower prefabricated column, a prefabricated beam, an upper column transfer member, a lower column transfer member, and a connecting slot of beam main reinforcement. The lower column transfer member is sleeved on an upper end portion of the lower prefabricated column. A first horizontal load transfer plate is arranged in the lower column transfer member. An upper end portion of a lower column main reinforcement is anchored at a top of the first horizontal load transfer plate. The upper column transfer member is sleeved on a lower end portion of the upper prefabricated column. A second horizontal load transfer plate is arranged in the upper column transfer member.