The results of the calculations are as many buckling shapes as the user required and the matching λ critical load parameters. The above-mentioned eigenvalue problem is solved by the so-called Lanczos method in FEM-Design. The critical load is the product of the load and the λ parameter. In the second step KG and the λ parameter can be determined. The calculation has to be performed in two steps.įirst, the normal forces of the elements have to be calculated by using the K matrix. It is an eigenvalue calculation problem, and the smallest λ eigenvalue is the critical load parameter. the resultant stiffness matrix becomes singular: The structure loses its loadbearing capability if the normal forces decrease the stiffness to zero, i.e. In case of linear elastic structures the geometrical stiffness matrix is a linear function of normal forces and consequently of loads: The total cost of ownership (TCO) The starting point is a financial estimate of the economic value of investment against the total direct and indirect cost savings over your system lifecycle. In the description of the second-order theory, it was pointed out that the resultant stiffness of the system depends on the normal force distribution. Based on our experience working with hundreds of organizations, we typically see the economic impact in three important areas: 1. Torsional moment effect on the whole structure can also be displayed, if the torsional effect was taken into consideration during the calculation. If equivalent loads are displayed, also the “base shear force” appears on screen (in grey colour). Results can be displayed by vibration shape (selected at calculation settings), from torsional effect, from sums by direction and from the total sum (seismic max). Resultsīesides displacements, reactions, connection forces, and internal forces, the program calculates the equivalent loads and the “base shear force”. Required spectrums can be defined with the Seismic load by using standard spectra (automatic) or by manual definition (unique). Only the response spectrum and some additional parameters have to be defined as Seismic load. Seismic loads are taken into account according to the Response Spectrum Analysis method of Eurocode 8 or Turkish seismic code. XTB calculations serve well as a basis for highly efficient molecular dynamics approaches or for exploratory geometry optimizations. Linear shape method (Static, linear shape). ![]() select the option tool in the menu at the top of the calculator. Modal response spectrum analysis (“Modal analysis”) The programs allows users to view the validated dynamic model weight change predictions.FEM-Design Design Modules Concrete Design Steel Design Steel Joint Timber Design CLT Design Foundation Design 3D Soil Design Masonry Design Composite Design Calculation Engine Construction Stages Diaphragm Calculations Dynamics Finite Element Mesh Peak Smoothing Documentation PREFAB-Print API BIM Integrations IDEA StatiCa connection FEM-Design Brochures FEM-Design Video Tutorials How to Get Started?įEM-Design supports you to perform seismic analysis with the following methods of seismic dynamics calculations according to Eurocode 8.
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