Structural Concept 2 PDF Print E-mail
Contributed by Koichi Paul Nii   
Wednesday, 30 December 2009

By Koichi Paul Nii

 

Unlike most all structures which are built having a life span of effective functional use, terraced structural framing, like earth’s surface, must function for a much longer time period.  Thus, these structures must be constructed to be both adaptable and economical.  In the near future, with building materials possibly using nanotechnology, they may be self-sustaining.  Until such time, today’s technology must be implemented.

 

Thus, three-dimension efficient use of these unused spaces address the present ecological and climate issues and would accelerate development to satisfy the following requirements: 1) ensure the flexibility necessary to accommodate quick changes in urban structures; 2) offer a variety of sizes, shapes or compositions and to readily apply to all types of use by setting a standardized variety of structural components; 3) ensure that every structural component with multiple component functions can be cheaply mass-produced in large quantities in the future; 4) ensure that fabrication and demolition of components can be achieved quickly and mechanically without posing problems of danger, noise, and vibration to areas adjacent to the construction site; 5) ensure safety in the event of natural or other disasters; 6) ensure that for the modularization of such necessary urban equipment systems as power supply, waste disposal-treatment, and information systems, that a terminal circuit net can be installed by compounding them and that such systems can be quickly fabricated as components to the highest possible degree; 7) ensure that systems for efficient use of energy and resources can be installed; 8)provide a structure that can cope with the distribution of traffic and materials; 9) provide an excellent living environment by planting vegetation on all levels, and to provide such mental comforts such as insulation, ventilation, sound proofing and privacy; 10) provide a constructed structure affording sufficient strength as an urban structure; 11) use for agriculture; and 12) reuse of resources must be possible after deconstruction.

 

The solution to achieve these requirements must also satisfy all of the following general assembly, maintenance, and disassembly criteria: a) structures constructed of materials readily available; b) structures made of components easily transportable; c) structures made of components easy to assemble and disassemble; and d) structural components replaceable without disruption to the structural system and the life activities of inhabitants of the structural system.

 

The best known solution to meet all these criteria is framing systems consisting of trusses.  For the horizontal platform, a space frame is used.  The truss beams supports the platform and truss columns carry the beams.  Truss members typically are modular length chords and associated connecting joints.  For the connection between space frame and beams or columns, joints are required.  One type of joint is used for platforms or horizontal surface elements; another joint is used for the vertical elements.  Many truss based connectors for variable space frame structural systems have been developed.  In total, these systems have limitations as to one or more of the necessary criteria for terraced structural framing systems using known construction methods.  To meet these conditions, an alternative construction method is used.  Present construction practice rigidly secures all framing members. This practice requires sequential construction, skilled workers, heavy equipment and a defined minimum construction time line.  To reduce the amount of the main sequences and time of construction, an alternative framing system proposed allows various parts of structures to be constructed simultaneously and be connected to each other at any location and at any time. 

 

It is a further objective to provide a truss joint and assembly system which can be quickly constructed from known materials without the necessity of welding or other specialized construction trades.

 

It is yet a further objective to provide a truss joint and assembly system easily assembled and disassembled, and maintainable without disruption to the life activities of inhabitants.

 

A further objective is to provide a truss joint and assembly system which can be easily assembled without the necessity of advanced training or specialized knowledge.

 

Finally, it is an objective to provide a truss joint and assembly system the components of which are easily transportable to a point of assembly, and which can accept temporary members to reduce the time and quantity needed for temporary structures yet permit repair and replacement of the joints.

 

The terraced structured land joint and assembly system is directed to such an efficient and affordable structural system and method for constructing terraced structural framing of any scale.  In an embodiment, self-interlocking joint assemblies are used to provide space frames, truss columns and truss beams, and to connect these systems.  Truss columns and truss beams transfer the space frame loads to the ground.  This framing system minimizes the need of custom-made items and allows more parts to be constructed simultaneously. 


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