Static Seismic Loads, Seismic Wave Propagation

Available following codes for seismic loads:



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

Static method correction factor, SF

The value at which the static equivalent accelerations are multiplied. Recommended value 1.3

Site Class

ASCE 7-22: Site class according to section 20

Importance Factor, Ip

ASCE 7-22: Importance factor Ip sec. 13.1.3

NSR-10: A.2.5.2

KBC 2016: Section 306.10.1.4

Importance Factor, IE

NBC 2020: Section

Pipe energy dissipation factor, Rp

NSR-10: A.9.4.9


NSR-10: Acceleration from map

Component amplification factor, Ap

NSR-10: Component amplification factor, Table A.9.6-1

KBC 2016: Table 306.10.2

Response factor, Rp

KBC 2016: Table 306.10.1

NBC 2020: Table

Component amplification factor, Ar

NBC 2020: Table

Component factor, Cp

NBC 2020: Table


CFE 2015:First Mode Period of Piping System


CFE 2015:Peak ground acceleration for rock soil, cm/s2

Damping ratio,

CFE 2015: Damping ratio

Importance factor, ga

Eurocode 8 (EN 1998-1):

Behavior factor, qa

Eurocode 8 (EN 1998-1):

Design Ground Acceleration, ag

Eurocode 8 (EN 1998-1): Design Ground Acceleration in G's

Region seismic activity

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

Site seismic activity

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 Kv

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

K1 Factor

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.


Horizontal seismic influence coefficient per. 5.1.4 GB50011-2016

Perform buried pipeline seismic wave propagation analysis

Perform seismic wave propagation analysis

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>Seismic