Random Wire Mesh Reinforcement for Multidirectional Concrete Crack Resistance
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Solution Overview
Problem
Existing concrete reinforcement methods, such as steel rebars and fiber-reinforced concrete, face challenges in effectively resisting tensile stresses and ensuring uniform fiber orientation and distribution, leading to inefficient crack resistance and fracture toughness.
Innovation Solution
The use of discrete wire meshes composed of orthogonal sets of parallel wires, randomly scattered throughout the concrete volume, providing improved crack resistance and fracture toughness through enhanced fiber distribution and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If straight fibers with hooked ends are used for concrete reinforcement, then bond between fibers and concrete is improved, but resistance to cracks crossing fibers near ends is insufficient and fiber orientation control is difficult
Solution Approach 1:
The patent divides the reinforcement function into multiple discrete wire mesh elements scattered throughout the concrete volume. Each mesh element consists of orthogonal wire sets that segment the crack propagation paths, providing reliable crack resistance without requiring complex fiber orientations or end hooks.
Solution Approach 2:
The patent transitions from one-dimensional straight fibers to two-dimensional wire mesh elements. This dimensional change allows the reinforcement to effectively intercept cracks in multiple directions simultaneously, improving crack resistance reliability while maintaining simple random distribution.
2Strength
If deformed fibers with uniform corrugations are used to improve bond, then special equipment and skilled labor are required for manufacture, increasing device complexity
Solution Approach 1:
The patent uses simple straight wires without complex deformations or corrugations. These basic wire elements can be manufactured using standard equipment without requiring specialized tools or skilled labor, reducing manufacturing complexity while maintaining effective reinforcement performance.
3Manufacturing precision
If random scattering of reinforcing members is used, then fiber distribution is improved, but control over fiber orientation becomes difficult
Solution Approach 1:
The patent changes the geometric parameter of the reinforcing element from one-dimensional fibers to two-dimensional wire meshes. This parameter change allows the elements to effectively span and resist cracks in multiple orientations simultaneously, achieving reliable crack resistance with random scattering without requiring precise orientation control.
Data Source
AI summary
A fiber reinforced concrete includes a plurality of reinforcing wire meshes scattered and suspended in random orientation throughout the volume of concrete. The reinforcing wire meshes include a first set of two or more parallel wires extending along their length in a common plane and a second set of three parallel wires orthogonal to the first set along their length in a common plane. The first set and second set constitute an entire reinforcing member. The wire meshes may be formed by casting or welding in which the wires lie in a common plane or separate planes, respectively. The reinforcing members may have a total of two or four contiguous rectangles arranged in a mesh pattern. Free ends of the reinforcing members may be included and extend beyond the mesh pattern for increased anchorage. A method of reinforcing concrete is disclosed and may include a central or diagonal bend in the reinforcing members.