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General schema of the program
5.1
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Input phase
In this phase, the user inserts the data necessary for performing the analysis.
Define geometry
The geometric characteristics of the structure, that is the placement of the walls in the
plan and the height of the floors, constitute the foundation for insertion of the "structural
objects" found in the next phase.
The geometric data, mainly segments, are inserted directly in drawing mode, or by tracing
a DXF or DWG file.
Practical rules for effective importation - Prepare the tables before importing:
· Position the origin of the reference system in one of the vertexes of the plan.
· Define the limits of the graphic area around the plan to be imported (CAD program limits
command).
· Delete contiguous designs and images around the plan, maintaining only items that are
truly useful. Delete any screens that may be present.
· Check the unit of measurement selected. 3muri uses unit that you can see in Units and
formats geomety setting(default:"cm"). In this way, it is possibly to correctly scale the
design before importation, and to define the scaling factor to be used.
· Select the plan and blow up everything. (There should not be any blocks.)
· Save the design in dxf/dwg format, version "2000."
Structural characteristics
The structure is composed of "structural objects" which constitute the resistant
elements.
The objects are mainly vertical masonry walls with possible reinforcements (tie rods, tie
beams, columns), floors for the distribution of horizontal actions, and linear elements
(beams, columns) made from various material types (R.C., steel, wood).
Every object is characterized by its material and additional geometric parameters
(thickness, inertial characteristics, resistance properties).
Reinforcement parameters are requested for R.C. structures as non-linear analysis is
performed for these elements.
Drawing area for insertion of Geometry (walls)
Drawing area for insertion of Structural Objects