Traffic Barrier Post Flange Integration
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Solution Overview
Problem
Existing crash barriers face issues with the mounting bracket tearing from the front flange during vehicle impacts, leading to reduced effectiveness in restraining vehicles, and previous solutions, such as using threaded rods, do not significantly enhance the restraint capacity.
Innovation Solution
The crash barrier features a profile steel post with a rear flange supporting threaded rods, which reduce deformation upon impact, and spacers with screw-attachable legs that pivot the barrier upwards to accommodate larger vehicles, while a clamp-style fastening bracket with flat steel absorbs impact forces, maintaining the tension member's effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the mounting bracket is attached only to the front flange of the post, then the installation is simple, but the bracket tears from the flange during vehicle impact, rendering the tension member ineffective
Solution Approach 1:
The mounting bracket is merged with the rear flange of the post by integrating the bracket body with the flange structure. The rear flange itself forms part of the mounting bracket, creating a unified structural element that cannot separate during impact, thus solving the retention problem while maintaining installation simplicity
Solution Approach 2:
The rear flange is pre-formed as an integral part of the post during manufacturing, eliminating the need for separate mounting bracket components. This preliminary integration ensures that the mounting structure is inherently secure before installation, preventing bracket tearing during vehicle impact
2Strength
If threaded rods are used to support the back of the post, then post deformation is reduced, but the device complexity increases
Solution Approach 1:
The threaded rods are extracted from being separate fastening components and are instead formed as an integral part of the rear flange structure. The rods are cast or formed directly into the flange, eliminating the need for separate rod components and fasteners, thus reducing device complexity while maintaining the post support function and deformation resistance
3Ease of manufacture
If standard spacers are used with legs screwed to the post, then retrofitting is simplified, but the spacer leg may tear out during impact
Solution Approach 1:
The spacer leg is merged with the rear flange structure, creating a unified component where the leg is an integral extension of the flange. This integration ensures that the leg cannot tear out during impact as it is structurally continuous with the reinforced flange, while maintaining the simple retrofitting approach using standard spacer components
Data Source
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AI summary
The invention relates to a guard rail (1) comprising a guard rail beam (4) fastened to posts (6) made of steel profile by means of spacers (5). A tension member (29), composed of threaded rods (30) connected to each other and attached to the posts (6) by means of fastening brackets (33), extends along the guard rail (1). The posts (6) comprise an outer flange (15) and the spacer (5) comprises a limb (18) that is fastened to the outer flange (15). The fastening bracket (33) comprises a middle segment (34) for receiving the threaded rod (30) and an end segment (35, 36) threaded to the post (6) on each side of the middle segment (34). One end segment (35) of the fastening bracket (33) is threaded by means of a screw (25) passing through the limb (18) on the spacer (5).