FRP-Concrete Bond Testing Frame with Adjustable Guide Tower
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Solution Overview
Problem
Existing FRP-concrete bond testing methods lack a universal, adaptable, and mobile testing system that can perform various tests without varying devices and methods, leading to inconsistent results and reduced accuracy due to secondary forces and reactions.
Innovation Solution
A loading frame system that includes a standing guide tower, base section, and loading beam, allowing for height adjustment and mobility, enabling performance of multiple FRP-concrete bond tests, including double-shear, single-shear, beam-bending, and direct tension pull-off tests, while reducing secondary forces and reactions by integrating with existing devices like hydraulic jacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different testing methods are used for each FRP-concrete bond test, then specific test requirements are met, but testing system complexity increases and results consistency deteriorates
Solution Approach 1:
The patent implements a universal testing system with a common loading frame that can perform multiple FRP-concrete bond tests (double-shear, single-shear, beam-bending, mixed-mode, and direct tension pull-off tests) using a single integrated structure. The loading beam incorporates multiple loading points and adjustable configurations, allowing one device to replace multiple specialized testing devices, thereby reducing overall system complexity while maintaining adaptability across different test types.
2Reliability
If fixed-position loading systems are used, then testing stability is improved, but testing location flexibility deteriorates
Solution Approach 1:
The loading beam is designed with sliding ends that can move along the standing guide tower, transforming the system from a completely fixed structure to a dynamically adjustable one. This allows the loading beam to be repositioned vertically along the guide tower while maintaining horizontal stability during testing, enabling both stable testing execution and flexible relocation to different test positions or locations.
3Device complexity
If secondary forces are not eliminated, then testing setup simplicity is maintained, but measurement precision deteriorates
Solution Approach 1:
The loading frame employs asymmetric bracing members positioned at specific angles and locations to counteract the symmetric secondary forces generated during loading. The bracing members are strategically oriented to provide counterbalancing forces that eliminate unwanted lateral movements and rotational moments, thereby improving measurement precision without requiring complex additional correction mechanisms.
4Adaptability or versatility
If height adjustment is added to the loading frame, then testing adaptability is improved, but structural complexity increases
Solution Approach 1:
The standing guide tower is divided into multiple segments with standardized connection interfaces, allowing the height of the loading frame to be adjusted by reconfiguring the stacked segments. This modular segmentation enables height adaptability for different test configurations while keeping each individual segment structurally simple and easy to manufacture, thereby limiting the increase in overall structural complexity.
Data Source
AI summary
A loading frame for fiber reinforced polymer (FRP)-concrete bond tests includes a standing guide tower, a base section, and a loading beam. The standing guide tower is perpendicularly mounted to the base section. A testing load is applied to the loading beam when performing a series of FRP-concrete bond tests. A sliding end of the loading beam is positioned into a channel within the standing guide tower allowing the loading beam to be positioned at a preferred height. The engagement between the loading beam and the standing guide tower reduces secondary forces. The loading frame is mobile and may also be used with existing testing devices and systems used to perform the series of FRP-concrete bond tests.