Lattice Member Hollow Area Interlocking for Seismic Stress Distribution
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Solution Overview
Problem
Existing lattice structures used in building frames are prone to degradation and collapse under repeated stresses and seismic movements due to weak joints and interfaces, which are not effectively addressed by existing solutions.
Innovation Solution
The introduction of a lattice member design with a hollow area between connecting members, allowing for interlocking and stress transfer without relying on fastening means, and using metallic materials with specific shapes like 'X' or 'z' configurations to enhance strength and stiffness, enabling self-supporting modular structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If lattice members are connected by fastening means such as screws or bolts, then the structure can be assembled, but the joints deteriorate under repeated fatigue cycles
Solution Approach 1:
The patent implements nesting by inserting one lattice member into the hollow area of another lattice member, creating an interlocking configuration where the inserted lattice member's elongated members pass through the hollow area delimited by connecting members of the outer lattice member. This nested arrangement eliminates the need for fastening means at the joint interfaces while providing mechanical interlocking that resists degradation under repeated fatigue cycles.
2Strength
If hollow areas are introduced between connecting members, then stress distribution improves, but the structure complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the lattice member into distinct functional zones: solid connecting members that provide structural connection, hollow areas that facilitate stress distribution and enable interlocking, and elongated members that form the primary structural framework. This segmentation allows each zone to perform its specific function optimally while maintaining overall structural integrity.
Solution Approach 2:
The patent introduces hollow areas that create three-dimensional interlocking configurations between lattice members. The hollow areas are positioned between connecting members to form a spatial pattern that allows inserted lattice members to pass through and interlock, adding a dimensional aspect to the connection mechanism that improves stress distribution without requiring complex fastening systems.
3Strength
If interlocking action is used for coupling lattice members, then joint strength improves, but manufacturing complexity increases
Solution Approach 1:
The patent implements self-service by designing lattice members with built-in interlocking capabilities through their geometric configuration. The hollow areas between connecting members and the dimensions of elongated members are designed to automatically provide mechanical interlocking when one lattice member is inserted into another, eliminating the need for separate fastening operations or complex assembly procedures. The structure serves its own connection function through its inherent geometry.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
Lattice member (1) composed of at least two elongated members (11) arranged parallel or substantially parallel along their longitudinal axis and spaced from each other, at least two connecting members (12) being provided, which connecting members connect said at least two elongated members. Said at least two connecting members (12) are spaced from each other along the direction of the longitudinal axis of said at least two elongated members (11). Moreover said at least two connecting members (12) are successively arranged along the direction of the longitudinal axis of said at least two elongated members (11) such to form a hollow area (13), delimited by the at least two elongated members and by the at least two connecting members, said hollow area being intended for the insertion of further lattice members, beams and/or further structural elements along a direction incident to the longitudinal axis of the at least two elongated members.