Offset Grid Framework Structure for Seismic Storage Stability
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Solution Overview
Problem
Existing grid framework structures for storage systems are vulnerable to structural damage from powerful seismic events and require extensive auxiliary support structures that occupy valuable storage space and are not cost-efficient.
Innovation Solution
A grid framework structure with interconnected upright columns and grid members that are sub-divided into grid elements spanning across single upright columns, forming a woven-like pattern with interlocking features to enhance structural integrity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional grid framework structures are used with simple horizontal member connections, then the structure is easier to manufacture and assemble, but the structure fails to withstand powerful seismic forces and loses structural integrity
Solution Approach 1:
The grid members are segmented into multiple elements that can be independently connected to upright columns. Each grid member comprises multiple grid elements that can be separately attached to different upright columns, allowing the structure to be divided into manageable segments that can withstand seismic forces through distributed connection points rather than relying on a single complex joint system.
Solution Approach 2:
The connection between grid members and upright columns is enhanced at specific locations where seismic forces are most critical. The patent applies reinforced connection features at grid member-to-column interfaces, creating localized zones of increased strength and rigidity while maintaining simpler connections in less critical areas, thus improving overall seismic resistance without uniformly increasing complexity throughout the entire structure.
2Stability of the object's composition
If grid members are connected only at their ends to upright columns, then the structure is simpler to assemble, but the structure becomes unstable under strong lateral forces during seismic events
Solution Approach 1:
The connection system transitions from purely two-dimensional end-to-end grid member connections to a three-dimensional arrangement where grid elements connect to upright columns at multiple vertical levels and horizontal positions. This dimensional expansion creates a more stable spatial framework that resists lateral seismic forces through distributed three-point or four-point connections rather than simple two-point end connections.
3Strength
If extensive auxiliary support structures are added to withstand seismic forces, then the structural integrity during seismic events is improved, but the storage capacity and efficiency of the grid framework is reduced
Solution Approach 1:
The grid members serve dual functions: they provide the primary storage framework structure and simultaneously act as seismic reinforcement elements. By designing the grid members themselves to have enhanced connection capabilities and structural rigidity, the patent eliminates the need for separate auxiliary support structures, as the same grid members perform both storage and seismic resistance functions, thus preserving storage capacity while improving seismic strength.
Data Source
AI summary
A grid framework structure for supporting a load handling device operative to move one or more containers includes: plural upright columns arranged to form vertical storage locations for containers to be stacked and be guided by the upright columns in a vertical direction. The upright columns are interconnected at their top ends by a first set of grid members extending in a first direction and a second set of grid members extending in a second direction, the second set running transversely to the first set in a substantially horizontal plane to form a grid structure having grid cells. The first and second sets of grid members are sub-divided into plural grid elements such that adjacent grid elements extending in the first direction or the second direction are offset with respect to each other in the horizontal plane by at least one grid cell.