Buckling-Restrained Brace Bolt Fixation Rigidity
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Solution Overview
Problem
The existing buckling-restrained brace designs face issues with reduced rigidity due to shortened steel pipe lengths and require high skill for welding-based fixation methods, making it difficult to securely attach the brace to structure gusset plates.
Innovation Solution
A buckling-restrained brace design featuring a plate member with bolt holes at its ends and a buckling-restrained member with a pipe surrounding the plate, filled with a filler to prevent buckling, allowing for easy bolt-based fixation and increased pipe length, thus enhancing rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the buckling-restrained brace is fixed to gusset plates using splice plates and bolts as in the related art, then the fixation is simple and does not require high skill, but the length of the steel pipe is decreased, resulting in decreased rigidity of the entire buckling-restrained brace
Solution Approach 1:
The invention extracts and eliminates the splice plates from the configuration, allowing the buckling-restrained brace to be directly fixed to the gusset plate. This removal of intermediate components enables the steel pipe to extend fully to the end portions of the buckling-restrained brace, increasing its length and rigidity while maintaining simple bolt-based fixation.
Solution Approach 2:
The invention changes the dimensional arrangement by having the steel pipe extend to the very end portions of the buckling-restrained brace in the axial direction, rather than being limited by splice plates. This dimensional extension of the steel pipe increases the effective length and rigidity of the buckling-restrained brace.
2Strength
If welding is used to fix the gusset plates and buckling-restrained brace together, then the rigidity can be maintained, but high skill is required and it becomes difficult to fix the buckling-restrained brace
Solution Approach 1:
The invention replaces the welding process with a mechanical fastening system using bolts. By directly fixing the buckling-restrained brace to the gusset plate with bolts, the need for welding is eliminated, making the fixation process easier and not requiring high skill, while still maintaining the necessary rigidity through proper bolt connection design.
3Device complexity
If the length of the axial-force member is decreased due to the configuration with splice plates, then the overall structure becomes more compact, but the rigidity of the entire buckling-restrained brace is decreased
Solution Approach 1:
The invention extracts and removes the splice plates from the configuration, allowing the steel pipe to extend fully to the end portions of the buckling-restrained brace. This elimination of intermediate components maximizes the length of the steel pipe, thereby increasing the rigidity of the entire buckling-restrained brace.
Solution Approach 2:
The invention changes the dimensional arrangement by extending the steel pipe to the very end portions of the buckling-restrained brace in the axial direction, rather than having it terminated by splice plates. This dimensional extension increases the effective length and rigidity of the buckling-restrained brace.
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 design allows for increased rigidity and simplified, reliable fixation of the buckling-restrained brace to structure gusset plates using bolts, effectively transmitting axial forces and improving the brace's ability to absorb vibration energy.
Implementation Method 1
a buckling-restrained member configured to restrain a center portion of the plate member in the axial direction to prevent the plate member from buckling
Implementation Method 2
a bond-preventing film is provided in the gap between the axial-force member and the restrained member so as to prevent bonding therebetween
Data Source
AI summary
The buckling-restrained brace that is capable of being fixed to connected portions of a structure using bolts, the brace includes: a plate member extending in an axial direction, and in which bolt holes for fixing the bolts are formed at end portions of the plate member in the axial direction; and a buckling-restrained member configured to restrain a center portion of the plate member in the axial direction to prevent the plate member from buckling, wherein the buckling-restrained member includes a pipe member surrounding the plate member from the outside in a radial direction, and a filler filling the gap between the pipe member and the plate member, and the plate member includes a fixing plate, a portion of which is embedded in the filler, and the remaining portion is protruded from the filler in the axial direction, and in which the bolt hole is formed at an end portion of the remaining portion in the axial direction.