Displaceable Shear Reinforcement Device for Concrete Slabs
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Solution Overview
Problem
Existing shear reinforcement devices for flat slabs require precise installation based on reinforcing bar positions, limiting variability and flexibility, as they must be positioned along the bars and installed at all points, even where not technically necessary, which complicates on-site installation and manufacturing processes.
Innovation Solution
A shear reinforcement device with a displaceable shear reinforcement element that can be fixed at different heights on an elongate holding element, allowing for independent positioning relative to reinforcing bars, enabling flexible adaptation to concrete structures and allowing for installation after reinforcing bar assembly, with features like a shank holder for secure fixing and a latching element for tool-free assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shear reinforcement elements are attached to reinforcing bars directly, then the connection is secure and stable, but the installation position must be very precise and the elements can only be positioned along the reinforcing bars
Solution Approach 1:
The patent introduces a retaining element as an intermediary component between the shear reinforcement element and the reinforcing bar. The retaining element has a fixing position that attaches to the reinforcing bar and a receiving position that holds the shear reinforcement element. This mediator enables secure connection while providing positioning independence, as the retaining element can be placed at various locations relative to the reinforcing bars.
Solution Approach 2:
The system is divided into separate functional components: the retaining element (which interfaces with reinforcing bars) and the shear reinforcement element (which provides structural function). This segmentation allows each component to be optimized independently and enables flexible assembly configurations where the shear reinforcement element can be positioned at different heights on the retaining element.
2Reliability
If reinforcing bars are installed at all points where shear reinforcement is required, then the structural requirements are met, but unnecessary reinforcing bars are installed where not technically needed
Solution Approach 1:
The retaining element serves as a positioning intermediary that decouples the shear reinforcement element from direct dependency on reinforcing bar locations. This allows shear reinforcement to be installed at optimal structural positions using the retaining element as a reference, rather than being constrained to follow reinforcing bar layouts, reducing unnecessary material installation.
3Reliability
If shear reinforcement elements are connected via strips with recesses, then the elements can be arranged in the recesses firmly held, but the variability for various structural requirements is limited
Solution Approach 1:
The retaining element features a longitudinal axis along which the shear reinforcement element can be displaced to different heights before being fixed in the fixing position. This dynamic positioning capability during installation provides variability for different structural requirements, while the final fixed position ensures firm holding and stable positioning.
Data Source
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AI summary
The invention relates to a shear reinforcement device for slabs such as flat slabs or balcony slabs of a reinforced or prestressed concrete structure with at least one reinforcing bar (8, 9, 74) arranged in the concrete structure. The shear reinforcement device (1) comprises elongated shear reinforcement elements (2) having essentially the shape of a bolt. The shear reinforcement device (1) comprises fastening elements (7), wherein in a fastening position (43) at least one of the fastening elements (7) is attached to at least one of the shear reinforcement elements (2), and wherein in the fastening position (43) the fastening element (7) is provided for fixing the shear reinforcement element (2) relative to the reinforcing bar (8, 9, 74). In the fastening position (43), the shear reinforcement element (2) is attached to an elongated retaining element (6) by means of the fastening element (7).The elongated retaining element (6) is positioned in the fastening position (43) to rest against the reinforcing bar (8, 9, 74). The shear reinforcement element (2) is displaceable in the fastening position (43) approximately in the direction (75) of the longitudinal axis of the shear reinforcement element (2).