Structural Brace Core Cutout Pattern for Seismic Energy Absorption
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Solution Overview
Problem
Current building techniques often fail to withstand repeated and large-magnitude seismic forces, compromising the structural integrity of buildings during earthquakes.
Innovation Solution
The development of structural braces with a core member that undergoes plastic deformation and is resistant to buckling, featuring a cutout pattern and paddles to absorb energy, coupled with a housing and spacing material to enhance deformation and prevent buckling, allowing the brace to maintain structural integrity under seismic forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current building techniques are used, then construction simplicity is maintained, but the building cannot withstand repeated and large-magnitude seismic forces
Solution Approach 1:
The core member is segmented with cutout patterns (oval, circular, or rectangular shapes) along its length, creating multiple discrete regions that can deform independently. This segmentation allows the brace to absorb seismic energy through controlled deformation of individual segments while maintaining overall structural integrity, resolving the contradiction between seismic resistance and structural simplicity.
Solution Approach 2:
The patent changes the geometric parameters of the core member by introducing cutouts with specific dimensions, shapes, and spacing. These parameter changes enable the core member to undergo plastic deformation and resist buckling under seismic loads, transforming a simple structural element into one with enhanced seismic performance without requiring complex external systems.
2Loss of energy
If the core member undergoes plastic deformation to absorb energy, then seismic force absorption is improved, but buckling resistance may deteriorate
Solution Approach 1:
The cutout patterns are strategically positioned at specific locations along the core member where plastic deformation is expected to occur. This local modification allows energy absorption to be concentrated in specific zones while other portions of the core member maintain their full buckling resistance, resolving the contradiction between energy absorption and buckling resistance.
Solution Approach 2:
The core member combines regions of modified geometry (with cutouts) and unmodified geometry (solid sections) to create a composite structural system. The cutout regions provide energy absorption capacity through plastic deformation, while the solid regions provide buckling resistance, achieving both functions simultaneously within a single monolithic component.
3Ease of manufacture
If the core member is monolithically formed with constant width, then manufacturing simplicity is maintained, but deformation control under seismic forces deteriorates
Solution Approach 1:
The cutout patterns are pre-formed into the core member during manufacturing, creating predetermined deformation zones before the brace is installed. This preliminary action ensures that under seismic forces, the core member will deform in a controlled manner at the cutout locations, maintaining reliability while preserving manufacturing simplicity through monolithic fabrication.
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 structural braces effectively absorb seismic forces through deformation, maintaining the structural integrity of buildings by preventing buckling and allowing for repeated cycles of stress without significant deterioration.
Implementation Method 1
the core member may provide plastic deformation and resist buckling in response to absorption of energy
Implementation Method 2
the void may be configured to permit the first paddle and the second paddle to move toward each other as the core member is longitudinally compressed
Data Source
AI summary
A structural brace may include a core member, which may include a first end, a second end, and a center portion. The center portion may include a cutout pattern disposed along a length of the center portion. In response to absorption of energy from seismic forces, the core member may provide plastic deformation and may be resistant to buckling. The structural brace may include a housing, which may surround at least the center portion of the core member. The structural brace may include a spacing material between the core member and the housing.