Fiberglass Guard Rail with Embedded High-Strength Rods
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Solution Overview
Problem
Conventional guardrails made of galvanized beams often fail to effectively redirect or slow vehicles, as they can break under excessive force, leading to inadequate safety for motorists who have left the roadway.
Innovation Solution
A guardrail system comprising a fiberglass or fiber-reinforced plastic longitudinal body with embedded rods and posts, where the rods have a higher tensile strength than the body, and the system includes channels and splicers for secure attachment, enhancing the absorption of vehicle impact and redirection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional galvanized beam guardrails are used, then the structure is simple and easy to manufacture, but the guardrail breaks under excessive force and fails to effectively redirect or slow vehicles
Solution Approach 1:
The patent employs composite materials by embedding high-strength rods (with higher tensile strength than the longitudinal body) within a fiberglass or fiber-reinforced plastic longitudinal body. This composite structure combines the advantages of different materials: the fiberglass body provides flexibility and energy absorption, while the embedded rods provide enhanced tensile strength and structural integrity, preventing breakage under excessive vehicle impact forces.
2Strength
If the longitudinal member has higher tensile strength than the longitudinal body, then the structural integrity under impact is improved, but the manufacturing precision and assembly complexity increase
Solution Approach 1:
The high-strength rods are pre-positioned and embedded within the longitudinal body during the manufacturing process before the final assembly. This preliminary action ensures that the rods are precisely positioned and securely integrated into the fiberglass matrix, eliminating the need for complex post-assembly alignment procedures and reducing the overall manufacturing precision requirements for the final assembly stage.
3Reliability
If channels and splicers are used for secure attachment, then the reliability of guardrail system is improved, but the device complexity and number of components increase
Solution Approach 1:
The guardrail system is divided into modular sections connected by splicers that fit into channels. This segmentation allows for standardized, pre-fabricated components that can be reliably assembled on-site. The channels and splicers create repeatable connection points that ensure consistent attachment reliability across the entire guardrail system, while the modular nature actually simplifies installation and maintenance compared to continuous custom-fitted structures.
Data Source
AI summary
A guardrail system for use along a roadway. The system can include a longitudinal body having one or more longitudinal void spaces formed therein, at least one substantially vertical post connected at one or both ends of the body, and a longitudinal member disposed within any one of the longitudinal void spaces of the body having a crosswise ultimate tensile strength that is at least 20% greater than the crosswise ultimate tensile strength of the longitudinal body.