Coupling Structure Shear Capacity via Reinforced Joint
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Short-span reinforced concrete coupling beams are prone to shear failure and wrap-slip failure, making current diagonal reinforcement configurations difficult to implement and inefficient, with existing design schemes having complex designs and unclear failure modes.
Innovation Solution
A coupling structure comprising a main coupling unit with plastic hinge regions, a reinforced unit, and a concrete layer, where the reinforced unit is embedded around the middle region of the main coupling unit, featuring main and working bars with stirrups, and tie bars, enhancing shear force capacity and seismic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If diagonal reinforcement bars are added to coupling beams to increase shear force capacity, then the shear force capacity is improved, but the construction difficulty and device complexity increase significantly
Solution Approach 1:
The patent extracts the diagonal reinforcement bars from the coupling beam and relocates them to the coupling joint region. This separation allows the coupling beam to use simpler horizontal stirrups while the diagonal bars concentrate their shear-resisting function at the joint, reducing overall construction complexity while maintaining shear capacity.
Solution Approach 2:
The patent applies local quality by concentrating the diagonal reinforcement specifically in the coupling joint region rather than distributing it throughout the entire coupling beam. This localized approach provides enhanced shear capacity where it is most needed (at the joint) while avoiding the complexity of diagonal bars throughout the full beam length.
2Strength
If steel plates are inserted into reinforced concrete coupling beams to increase shear force capacity, then the shear force capacity is improved, but the moment capacity increases excessively and shear force requirements increase
Solution Approach 1:
The patent uses local quality by placing diagonal reinforcement bars specifically in the coupling joint region rather than throughout the entire beam. This localized reinforcement provides shear capacity enhancement where needed without creating excessive moment capacity in the beam spans, thereby avoiding increased shear force requirements.
Solution Approach 2:
The patent segments the reinforcement function by separating the shear-resisting diagonal bars from the flexural reinforcement in the beam. The diagonal bars are concentrated in the joint region to provide shear capacity without significantly increasing the moment capacity of the beam spans, thus avoiding the need for additional shear reinforcement.
3Strength
If traditional diagonal reinforcement configuration is used in short-span coupling beams, then shear force capacity is improved, but construction efficiency decreases due to implementation difficulty
Solution Approach 1:
The patent extracts the complex diagonal reinforcement from the coupling beam and relocates it to the coupling joint. This allows the coupling beam itself to use simpler horizontal stirrups that are easier to construct, while the diagonal bars are concentrated in the joint region where they can be more efficiently installed and anchored.
Solution Approach 2:
The patent inverts the traditional approach by not placing diagonal bars in the coupling beam but instead concentrating them in the coupling joint region. This inversion simplifies the beam construction while maintaining the shear-resisting function through the joint reinforcement, thereby improving construction efficiency.
Data Source
AI summary
A coupling structure is arranged between a first boundary member and a second boundary member. The coupling structure mainly includes a main coupling unit, a reinforcement unit, and a concrete layer, and the reinforcement unit is arranged on the main coupling unit and surrounds an intermediate area of the main coupling unit, and the main coupling unit and the reinforcement unit are both embedded in the concrete layer. The coupling structure can solve the current design difficulties of short columns and short beams and has excellent seismic performance and higher construction efficiency.