Construction using bundled tube and threaded stepped dowels
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Solution Overview
Problem
The construction of taller wooden buildings is hindered by the difficulty in creating large wooden columns that can support the weight, and traditional metal fasteners are not suitable for joining large wooden construction components effectively, leading to structural integrity issues and challenges in using engineered wood for megastructures.
Innovation Solution
A method using bundled tubes formed by combining smaller pillars of varying lengths to create larger columns, with a threaded stepped dowel system for enhanced connection and structural integrity, allowing for the creation of columns that can support tall structures and enabling the use of engineered wood in megastructures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional metal fasteners are used to join wooden components, then the connection can be achieved, but the structural integrity and compatibility with large wooden construction components is insufficient
Solution Approach 1:
The patent uses wooden dowels instead of metal fasteners to join wooden components, creating material homogeneity throughout the structure. This eliminates the incompatibility between dissimilar materials (metal and wood) and ensures uniform structural behavior under load, directly resolving the contradiction between structural integrity and material compatibility.
Solution Approach 2:
The patent employs a composite connection system where wooden dowels are embedded in epoxy adhesive to create a wood-epoxy-wood composite joint. This composite approach provides both the mechanical strength needed for structural integrity and the material compatibility required for working with large wooden construction components.
2Strength
If single large wooden columns are created to support tall structures, then the load-bearing capacity is sufficient, but the manufacturing and handling becomes extremely difficult
Solution Approach 1:
The patent divides large columns into multiple smaller wooden segments that can be manufactured and handled separately. These segments are then joined using wooden dowels and epoxy adhesive to form a composite column structure that achieves the load-bearing capacity of a single large column while maintaining ease of manufacture and handling of individual components.
Solution Approach 2:
The patent combines multiple smaller wooden segments into a unified column structure through the use of wooden dowels and epoxy adhesive. This merging process creates a composite column that achieves the strength and load-bearing capacity of a single large column while avoiding the manufacturing and handling difficulties associated with creating one monolithic large column.
3Ease of manufacture
If platform construction method is used with side-grain wood panels, then the construction is simple, but the crushing strength is insufficient for taller buildings
Solution Approach 1:
The patent uses composite wood products such as cross-laminated timber (CLT) and glued laminated timber (glulam) that combine wood layers in different orientations. These composite materials provide both the construction simplicity of engineered wood products and the enhanced crushing strength required for taller buildings, resolving the contradiction between ease of manufacture and structural strength.
Data Source
AI summary
A system and method for creating a column for construction using bundled tube are provided. The column having a bottom portion, a middle portion, and a top portion. Each portion consists of a bundle of individual pillars, comprising a center pillar, a plurality of corner pillars, and a plurality of middle pillars. From the bottom portion of the column, addition pillars can be affixed on top of the pillars of the bottom portion, thus forming the middle and the top portion of the column. Each pillar can be secured to another component using a thread stepped dowel comprising of a base section, at least one middle section, and a tip section, with each section being progressively smaller in circumference than the last. The at least one middle section of the threaded stepped dowel further comprises thread spiraling around the outer surface of the at least one middle section.