Foam Wall Structure with Embedded Mesh for Seismic Ductility
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Solution Overview
Problem
Existing foam wall structures, while providing high racking shear strength, lack ductility, which is crucial for withstanding seismic activity without collapsing, as they do not continue to absorb energy after shear failure.
Innovation Solution
A foam wall structure design comprising a frame with a mesh mechanically fastened to its front surface, a foam panel abutting and overlapping the mesh, and a foam layer penetrating the mesh to adhere to the panel, allowing for consistent thickness and enhanced energy absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a foam wall structure uses high racking shear strength design, then shear strength is improved, but ductility deteriorates
Solution Approach 1:
The patent combines foam panels with metal mesh to create a composite wall structure. The foam provides shear strength while the metal mesh embedded within the foam maintains ductility, allowing the wall to bend and absorb energy during seismic events without collapsing.
Solution Approach 2:
The patent modifies the foam density and composition parameters to achieve optimal balance between shear strength and ductility. By controlling the foam's physical properties and the mesh integration, the structure achieves both high strength and energy absorption capabilities.
2Manufacturing precision
If foam wall structures are manufactured with consistent thickness, then manufacturing precision is improved, but adaptability to seismic activity deteriorates
Solution Approach 1:
The composite design allows consistent foam panel thickness for manufacturing precision while the embedded metal mesh provides the ductility needed for seismic adaptability. The mesh acts as a reinforcement skeleton that maintains structural integrity under varying stress conditions.
Solution Approach 2:
The patent applies different properties to different parts of the wall structure. The foam provides consistent insulation and structural baseline, while the locally distributed metal mesh provides ductility and seismic response capability throughout the structure.
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
The solution significantly increases the wall's ultimate shear strength and maintains ductility, enabling it to absorb energy and maintain structural integrity during seismic events, while maintaining consistent thickness with adjacent walls.
Implementation Method 1
the foam layer penetrates the mesh and adheres to the foam panel
Data Source
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AI summary
Foam wall structures and methods for making them are described. The wall structures include a frame, a mesh mechanically fastened to a front surface of the frame, a foam panel at least partially abutting and overlying the mesh, and a foam layer disposed in a cavity defined by the frame, the mesh, and the foam panel. Buildings that include such wall structures are also described.