Z E M C H 2 0 1 2 I n t e r n a t i o n a l C o n f e r e n c e
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SECTION 2: BIM, Monitoring and Modeling
2.1 Structural Design Modeling & Estimation
The Enemetric BIM software contains conventional structural design procedures. First,
the software will perform Finite Element Analysis on the geometric model supplemented
with external loading input. Using the Finite Element Analysis results, the software
designs cross-sections and structural members according to Eurocode ultimate and
serviceability limit states, and lowest potential cost, taking into account smaller cross-
sections are more desirable. The stress and deformation of all structural components
undergo a resistance check, and finally the weight and cost of the complete structure is
output.
The Finite Element Analysis component of the Enemetric BIM software differs from
commercial structural design packages, which can be complex to use, requiring several
layers of detail. Using conventional packages would require detailed construction of the
structure's individual elements, specifying locations and materials of each member, and
most importantly, an accurate representation of the inter-connections between modules.
Doing so by hand is time-costly, error-prone and tedious.
Figure 4: DXF format plane drawing input to the BIM
Enemetric's BIM software however only requires a modified DXF format plane drawing,
where modules are simply represented as crossed lines. The software can then directly
construct a Finite Element model, including preliminary design cross-sections, additional
middle beams and columns, according to previous design experience. External walls are
automatically designed by the package, while internal walls, windows and doors can be
input in the same DXF file; therefore the file contains both architectural and structural
cues in terms of building information. Figure 4 shows a sample input drawing of the BIM
system.
Beyond an accurate cost estimation produced by the software, further outputs include a
structural design report and the foundation action report. The reports provide detailed
calculation procedures for permanent action, wind loading, bending resistance and
deflection checks for columns and beams, while calculating foundation reactions due to
