Determine the seismic motions or strong ground motions and their effect on structures is one of the major topics for seismic engineering. Because of this, on a single degree of freedom systems, the real seismic motions must be analyzed.

At the beginning of this innovation, seismic movements, earthquakes, and strong ground motions have been investigated exhaustively. Also, the calculation of instrumented seismic motion data is analyzed. Moreover, time domain and frequency domain seismic motions are calculated because of their importance in dynamic analysis.

For a second step, structural analysis under seismic loads is investigated. Single degree of freedom systems, linear and nonlinear behaviors are surveyed. Also for the same systems, seismic loads are studied as dynamic loads. In the light of these developments, Wodensoft developed the software: SeismoCalc.

The reason for the software development is to help seismic loading analysis for civil engineering constructions such as offshore structures for the extraction of hydrocarbon. The analysis of seismic motion data, generation of spectrums, and engineering intensity calculations can be done with SeismoCalc. In conclusion single degree of freedom systems can be studied under the real seismic motions with new software. On the other hand, it is a new chapter for structural earthquake engineering science.

To begin with we want to declare that, SeismoCalc is not the final version of our packaged software. It is able to develop according to your company’s needings.

SeismoCalc analyses any structure, which can be modeled as a single degree of freedom system, under, ground motions. This analysis cannot be done with a single software. To make a new vision for this problem, the SeismoCalc software application is developed.

SeismoCalc is a single degree of freedom system analyzing software under earthquake and seismic loads, which is based on Java programming language.

SeismoCalc can be summarized at three steps according to its three tabs.

First tab analyses the ground motion data. Seismic motions should be given as a .txt document.

The second tab generates spectrums and the last one calculates engineering intensities.

Any ground motion data which is generated by an accelerometer, in other words, time-domain records, can be used to start calculations. SeismoCalc is the only software that generates a tripartite spectrum, elastic design spectrum, and inelastic design spectrum.

SeismoCalc calculates 12 engineering intensities. These engineering intensities can be listed below.

  • IRMS Intensity
  • Arias Intensity
  • Housner Intensity (%20)
  • Housner Intensity (%5)
  • VRMS Intensity
  • DRMS Intensity
  • Cumulative Absolute Velocity
  • Effective Peak Acceleration
  • Specific Energy Density
  • Acceleration Spectrum Intensity
  • Velocity Spectrum Intensity
  • Characteristic Intensity

To sum up, SeismoCalc computer software processes raw ground motion data from several accelerometers. Then program computes a single degree of freedom systems under given seismic loads with different period and damping ratios. According to SeismoCalc software’s infrastructure, software usage is going to be more user-friendly. Besides, SeismoCalc computes three important spectrum graphs, tripartite spectrum, elastic design spectrum, inelastic design spectrum. These spectrum graphs are only generated by SeismoCalc. SeismoCalc program calculates unlimited period range. This functionality only belongs to SeismoCalc.

To calculate a single degree of freedom systems under real ground motion record is going to make quickness and remove inertia. SeismoCalc is not a final version but a basis for these kinds of innovations. The development of SeismoCalc is going to be a major step for both structural and seismic engineering sciences.

SeismoCalc is a new chapter for structural seismic engineering science and it is a milestone for our innovative software series.