Hoop Reinforcement Assembly for Stable Rebar and Formwork Positioning

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Solution Overview

Problem

Existing concrete stirrup apparatuses and formwork assemblies lack efficient mechanisms for positioning reinforcing bars and formwork, leading to potential dislodgement and inadequate shear strength in concrete structures.

Innovation Solution

A concrete stirrup apparatus with hoop reinforcement featuring inwardly and outwardly extending receptacles and spacers, made of fiber-reinforced polymer, is used to position reinforcing bars and formwork, enhancing shear strength and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional concrete stirrup apparatuses are used without efficient positioning mechanisms, then the structure is simpler and easier to manufacture, but the reinforcing bars and formwork are prone to dislodgement and misalignment

Engineering Contradiction:

Improvepositioning stabilityVSAvoidapparatus structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple functions into a single integrated stirrup apparatus: the hoop reinforcement provides structural support while simultaneously holding reinforcing bars, and the outwardly extending members simultaneously position both the reinforcing bars and the formwork. This merging of functions achieves reliable positioning without requiring separate complex positioning mechanisms for each component.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The stirrup apparatus is designed with multi-functionality: the hoop reinforcement serves as both the structural stirrup and the positioning framework, while the outwardly extending members serve as both spacers for reinforcing bars and positioning elements for formwork. This universal design allows one apparatus to perform multiple positioning tasks, improving reliability without proportionally increasing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Strength

If fiber-reinforced polymer is used for hoop reinforcement instead of steel, then the shear strength is equivalent and corrosion resistance is improved, but the material cost and processing requirements increase

Engineering Contradiction:

Improveshear strengthVSAvoidmaterial processing

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent employs fiber-reinforced polymer (FRP) as a composite material to replace traditional steel hoop reinforcement. The FRP consists of polymer matrix reinforced with fibers, providing equivalent or superior shear strength while adding corrosion resistance. The composite structure allows the material to achieve high strength-to-weight ratio and durability without requiring the same processing complexity as steel, as the FRP can be manufactured in ready-to-install configurations.

Inventive Principle:

Principle #40Composite materials

3Ease of operation

If multiple separate components are used for positioning reinforcing bars and formwork, then each component can be optimized for its specific function, but the assembly time and installation complexity increase

Engineering Contradiction:

Improveassembly efficiencyVSAvoidnumber of components

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent merges the positioning functions for both reinforcing bars and formwork into a single integrated stirrup apparatus. The outwardly extending members simultaneously serve as spacers for reinforcing bars and positioning elements for formwork, eliminating the need for separate positioning components. This reduces the number of parts to assemble and simplifies the installation process while maintaining optimized positioning for both elements.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The stirrup apparatus is designed with universal positioning capabilities where the same structural elements serve multiple purposes: the hoop reinforcement structures provide both structural integrity and the framework for positioning, while the outwardly extending members provide both bar spacing and formwork alignment. This multi-functionality reduces assembly steps and installation complexity compared to using dedicated separate components for each positioning task.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260009227A1Concrete stirrup apparatus, formwork assembly comprising the same and method of forming a concrete reinforced structure

Publication Date: 2026.01.08 FAB-FORM IND LTD

AI summary

There is provided a formwork assembly. The formwork assembly includes a plurality of longitudinally-extending and laterally spaced-apart steel reinforcing bars. The formwork assembly includes a hoop reinforcement shaped to extend about the reinforcing bars. The hoop reinforcement is configured to provide shear strength to concrete poured into the formwork so positioned. The formwork assembly includes a plurality of receptacles circumferentially spaced-apart about, coupled to and radially inwardly-extending from the hoop reinforcement so as to promote a desired positioning or spacing of the reinforcing bars. The formwork assembly includes a plurality of spacers circumferentially spaced-apart about, coupled to and radially outwardly-extending from the hoop reinforcement. The formwork assembly includes a formwork shaped to extend about and be positioned in place via the plurality of spacers. There is further provided a concrete stirrup apparatus comprising said hoop reinforcement, receptacles and spacers.