Field-Testable FRP Anchors for In-Situ Strength Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for verifying the quality and efficacy of fiber-reinforced polymer (FRP) anchors in the field lack visual or mechanical verification of embedment depth and integrity, making it difficult to ensure compliance with design criteria and laboratory standards.
Innovation Solution
The development of field-testable FRP anchors with a precured end portion and splayed rovings sandwiched between plates, allowing for mechanical connection to testing equipment, enabling in-situ strength measurement and verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If FRP anchors are installed using conventional methods without testing provisions, then installation is simpler and faster, but quality verification and compliance assessment become impossible in the field
Solution Approach 1:
The anchor is segmented into distinct functional portions: an embedded precured end portion for structural integration, a middle section with splayed rovings for load transfer, and an external portion with attachment features for testing. This segmentation allows the testing function to be added without compromising the structural integrity or installation simplicity of the main anchor body.
Solution Approach 2:
The patent introduces intermediary testing components such as external attachment plates, threaded rods, or loop fixtures that mediate between the anchor and testing equipment. These intermediaries enable field testing without requiring modification to the anchor's core structural design, thus maintaining simplicity while enabling quality verification.
2Measurement precision
If FRP anchors lack external attachment features, then manufacturing and installation are simpler, but field testing of embedment strength and integrity cannot be performed
Solution Approach 1:
The precured end portion is manufactured with embedded attachment features (such as integrated loops, threaded inserts, or plate configurations) before the anchor is installed. This preliminary incorporation of testing provisions allows for straightforward field testing without requiring additional manufacturing steps or complex fabrication processes after the anchor is cured.
Solution Approach 2:
The external attachment features are designed to serve multiple functions: they provide anchorage for the rovings during curing, serve as attachment points for loading during field testing, and maintain structural integrity during service. This multi-functionality reduces the need for separate testing-specific components, simplifying manufacturing while enabling precise strength measurement.
3Strength
If FRP anchors rely solely on surface adhesion, then installation is simpler with fewer components, but bond strength and structural integrity are insufficient under high strain conditions
Solution Approach 1:
The anchor employs a nested configuration where the precured end portion is embedded within the structural substrate, the rovings are splayed and nested within the substrate matrix, and external attachment features are nested or integrated with the roving bundle. This nested arrangement maximizes bond strength through multiple interfaces while maintaining a compact overall structure that does not significantly increase device complexity.
Solution Approach 2:
The anchor utilizes composite material construction combining FRP rovings with adhesive matrices, creating a hybrid system that leverages the high tensile strength of fibers and the bonding capability of adhesives. This composite approach significantly enhances bond strength and structural integrity compared to single-material solutions, while the integration of these materials follows established manufacturing processes that limit complexity increases.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides a means to assess the quality and compliance of FRP anchors in the field, ensuring they meet design criteria and standards, enhancing structural integrity and load resistance.
Implementation Method 1
The adhesives can range from epoxies, vinyl esters, phenolic materials, cementitious materials etc.
Implementation Method 2
FRP based anchors and connectors are used to enhance bond/attachment for and to create continuity of surface mounted repair and strengthening systems. Anchors and connectors comprise fiber rovings, which in turn are composed of fiber filaments, and adhesives.
Data Source
AI summary
A fiber reinforced polymer (FRP) anchor configured for field testing includes a precured end portion at a first end of the FRP anchor, a plurality of rovings extending from the precured end portion to free ends at a second end of the FRP anchor wherein the rovings being splayed in a first plane, and a pair of plates disposed at opposite sides of the rovings relative to the first plane. The plates are cured to the splayed rovings.