Static Seismic Loads, Seismic Wave Propagation



Seismic Code

START-PROF Calculate Seismic acceleration according to selected code:

  • User defined acceleration

  • NP 031-01

  • SNiP II-7-81

  • SP 14.13330.2018

  • GB 50011-2010

Region seismicity

Construction region seismicity (7, 8, 9 points on the MSK-64 scale)

Site seismicity

Construction site seismicity (6, 7, 8, 9, 10 points)

Site soil category

I, II, III. Table 1 SNIP II-7-81*, table 1 SP 14.13330.2018, appendix 1 NP-031-01

Vertical seismic acceleration factor

Equal to the correlation of maximum (peak) vertical soil acceleration and maximum (peal) horizontal soil acceleration. Set based on seismic microzoning data. In the absence of data, should be set as  0.7. More...

Earthquake frequency

Table 17 SNIP II-7-81*, table 16 SP 14.13330.2018

Piping seismic resistance category

Is, IIs section 11.2.5 RD 10-249-98

Factor K1

0.125-1.0. Table 3 SNIP II-7-81*, table 5 SP 14.13330.2018. The following values are recommended:

  • when using GOST R 55596-2013: 0.25

  • when using SP 36.13330.2012:  for category I - 0.625, II - 0.5, III - 0.25

  • when using SNIP 2.05.06-85*: for category В - 0.625, I - 0.5, II, III, IV - 0.25

  • when using RD 10-249-98: for category Is - 0.625, IIs - 0.5

  • when using GOST 32388-2013: for pipelines of special importance, the functioning of which cannot be disrupted after an earthquake (containing dangerous products, fire extinguishing systems) 0.625, for pipelines the functioning of which is not crucial after an earthquake - 0.25. For others, 0.5.

Run analysis for long buried pipelines or pipelines on low supports

Not available in the current version


Horizontal seismic influence coefficient per. 5.1.4 GB50011-2001

Horizontal Acceleration

Horizontal seismic acceleration (+X, -X, +Y, -Y axes) in G's, 1G = 9.81 m/s2

Vertical Acceleration

Vertical seismic acceleration (+Z, -Z axes) in G's, 1G = 9.81 m/s2

Perform Buried Pipeline Seismic Wave Propagation Analysis

Perform special analysis for Seismic Wave Propagation

Buried pipeline seismic analysis code

Choose the code that will be used for seismic axial strain value calculation

Characteristic period of ground motion, Tg

Characteristic period of ground motion. Used to calculate the seismic wave lengths. The default value is 0.5 s

Menu Access

Dialog window opens automatically when creating a new analysis file or opening an existing analysis file. To open this window in an open file, use  File > Project Settings