Post-Tensioned Timber Reinforcement Module
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Solution Overview
Problem
Existing methods for reinforcing wooden construction structures, such as beams, are cumbersome and often require significant space and materials with poor fire resistance, making it difficult to effectively increase the structural inertia and rigidity without increasing size, especially in confined spaces.
Innovation Solution
A method involving the use of reinforcement modules made of solid or glued laminated wood, fixed to the beam with connectors and post-tensioned strands, which are anchored using a system that includes support plates and clamping devices, allowing for direct assembly on-site without the need for shoring ladder towers, thereby providing counter-deflection and enhancing mechanical continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic reinforcement materials (cables or tie rods) are used to reinforce wooden beams, then the bearing capacity and structural strength are improved, but the fire resistance deteriorates and the operating space around the beam is reduced due to large bulk
Solution Approach 1:
The invention changes the material parameter from metallic reinforcement to wooden reinforcement modules, transforming the reinforcement material to have better fire resistance while maintaining structural strength through post-tensioning strands
Solution Approach 2:
The invention creates a composite structure combining wooden reinforcement modules with post-tensioning strands, where the wooden modules provide fire resistance and the strands provide tensile strength, achieving both fire safety and structural reinforcement
2Stability of the object's composition
If reinforcement modules are added to the beam to increase inertia and rigidity, then the structural stability is improved, but the operating space requirement increases due to the need for shoring ladder towers to apply counter-deflection
Solution Approach 1:
The invention extracts the counter-deflection function from the shoring ladder tower and transfers it to the post-tensioning system, eliminating the need for bulky external shoring equipment and reducing operating space requirements
Solution Approach 2:
The invention introduces post-tensioning strands as an intermediary mechanism that applies counter-deflection forces internally within the reinforcement module, replacing the need for external shoring towers and reducing space requirements
3Strength
If the size of reinforcement modules is increased to improve rigidity, then the structural strength is improved, but the device complexity and space occupation increase
Solution Approach 1:
The invention changes the mechanical parameter of the reinforcement module by introducing post-tensioning, allowing smaller modules to achieve the same rigidity as larger modules would provide without post-tensioning
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
This approach simplifies the reinforcement process, enabling effective structural reinforcement in tight spaces with improved fire resistance and increased tensile and flexural strength without the need for extensive space or bulky materials, allowing for reliable and cost-effective reinforcement of degraded wooden structures.
Implementation Method 1
at least one strand (6a, 6b) is inserted into at least one housing (5a, 5b) provided in the reinforcement module (2), said strand being post-tensioned by a post-tensioning system (10)
Implementation Method 2
said strand being fixed by an anchoring device (7, 9, 12)
Implementation Method 3
The anchoring device comprises a support plate fixed to each end of the reinforcement module and a clamping device comprising a conical jaw capable of clamping each end of the corresponding strand
Implementation Method 4
The prosthesis thus contributes to increasing the inertia of the reinforced beam
Data Source
Figure 1
Figure 1a
Figure 2
AI summary
Method of reinforcing a solid wood or glued laminated wood building element (1), in which - at least one face (1a) of said building element (1) is fixed by means of at least one connector (3), at least one reinforcement module (2) of solid wood or glued laminated wood, - at least one strand (6a, 6b) is inserted into at least one housing (5a, 5b) provided in the reinforcement module (2), - said strand (6a, 6b) is post-tensioned by a post-tensioning system (10), and - said strand (6a, 6b) is fixed by an anchoring device (7).