Grid Deck Shear-Resisting Plates Connection Strength
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Solution Overview
Problem
The connection strength between pre-cast grid decks is often insufficient due to limited gap width, which can be exacerbated by narrow I-beams, leading to inadequate reinforcement and increased construction costs when attempting to enhance this with additional connecting bars or wider gaps.
Innovation Solution
Incorporating shear-resisting plates pre-cast into the grid decks, which protrude from the sides, allowing for a wider gap between decks and increased contact area with grout, thereby enhancing the connection strength without being limited by the beam width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the gap width between grid decks is increased to improve connection strength, then the connection strength is improved, but the device complexity and construction difficulty increase
Solution Approach 1:
The connecting bar is divided into multiple segments (first connecting bar portion, second connecting bar portion) that extend into the recesses of adjacent grid decks. This segmentation allows the connection to be distributed across multiple locations, increasing connection strength without requiring a single large gap or complex assembly process.
Solution Approach 2:
The recesses are pre-formed in the grid decks during pre-casting, and the connecting bars are designed to extend into these recesses before grouting. This preliminary preparation of the connection geometry eliminates the need for complex on-site modifications or adjustments, simplifying construction while maintaining strong connections.
2Strength
If additional connecting bars and lap-joint bars are provided to increase connection strength, then the connection strength is improved, but the manufacturing cost and construction complexity increase
Solution Approach 1:
The connecting bars extend vertically into the recesses of the grid decks, utilizing the depth dimension rather than relying solely on horizontal gap width. This dimensional transition allows sufficient connection strength to be achieved with standard bar quantities, eliminating the need for additional bars or increased material consumption.
3Strength
If the width of the gap between I-beam is increased to improve connection strength, then the connection strength is improved, but the structural design flexibility and construction adaptability decrease
Solution Approach 1:
The recesses are created locally in the grid decks at the connection positions, concentrating the connection enhancement where needed. This localized approach allows the overall grid deck design and I-beam spacing to remain flexible and adaptable, while providing enhanced connection strength specifically at the joint locations without constraining the broader structural design.
Data Source
AI summary
The present invention relates to a grid deck with shear-resisting plates and the assembly of the grid decks. The shear-resisting plates are pre-cast in the grid deck and protrude from the side surfaces thereof. When the grid decks with shear-resisting plates are assembled, they are laid on the beams with the shear-resisting plates contacting the beams and without the grid decks contacting the beams.