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Fespa EC | Concrete
Data Input
Modelling & Data Verification
Analysis
Design
Output presentation

Analysis

Fespa offers linear structural and dynamic analysis as well as non linear pushover analysis. All the analysis procedures are performed through a very powerful, fast and accurate solving algorithm. The speed of calculation is phenomenal even for the non linear analysis. The completion time of the non linear analysis for a five storey building, 350 m2 lies within the limits of some seconds.

Graphical presentation for both torsional flexibility and structural eccentricity control
Graphical presentation for both torsional flexibility and structural eccentricity control
3 dimensional wired frame view (3DV) of the structural model
3 dimensional wired frame view (3DV) of the structural model

The solution algorithm is equipped with the current trends of mathematics and engineering. For example complete CQC of modal responses, mass matrix formation with distribution of the mass at the nodes, six degrees of freedom per node, care for rigid diaphragms, automatic calculation of the number of mode shapes for 90% mass sum, automatic check for structural irregularities, works due to axial and shear forces-bending and torsional moments.

Axial force diagrams and loading diagrams for selected members
Axial force diagrams and loading diagrams for selected members
Moment diagrams of beams and columns
Moment diagrams of beams and columns

Bearing pressure diagrams
Bearing pressure diagrams
After the analysis procedure is finished, the engineer can use the three dimensional wire frame view tool (3DV) to:

  • Display the deformed geometry of the model based on any load, or combinations of loads.
  • View the animated deflections of the model.
  • View the animated various mode shapes of the modal analysis.
  • Display the shear, moment and axial force diagrams.

Non Linear Pushover Analysis

After the pushover analysis the Force-Displacment diagram as well as the value of au/a1 (for all combinations of loading distribution and direction of loading) is dispayed in 3DV.
After the pushover analysis the Force-Displacment diagram as well as the value of au/a1 (for all combinations of loading distribution and direction of loading) is dispayed in 3DV.
There is the option of explicitly calculating the overstrength factor au/a1 through pushover analysis. The engineer has the option of assigning values of au/a1 up to 1.5, according to EN 1998-1 and then confirming that value using pushover analysis. After the pushover analysis is finished the Force-Displacement diagram is generated, the value of au/a1 is calculated and both are displayed in 3DV. 3DV gives also the option to animate the development of plastic hinges.

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