RF-/DYNAM Pro - Equivalent Loads Add-on Module for RFEM/RSTAB


Receive regular information about news, useful tips, scheduled events, special offers, and vouchers at least once a month.

Extension of RF-/DYNAM Pro - Natural Vibrations Module for Static Load Analysis Using Multi-Modal Response Spectrum Analysis

The RF-/DYNAM Pro - Equivalent Loads add‑on module performs seismic analysis using the multi-modal response spectrum analysis. The required spectra can be created according to the standards or user‑defined. Subsequently, the equivalent static loads are generated.

  1. Features

    • Response spectra according to various standards
    • The following standards are implemented:
      •  EN 1998-1:2010 (European Union)
      •  DTR B C 2-48 (Algeria)
      •  DTR RPA99 (Algeria)
      •  CIRSOC 103 (Argentina)
      • Australia AS1170.4 (Australia)
      •  ÖNORM B 4015:2007-02 (Austria)
      • Canada NBC 2005 (Canada)
      •  NCh 433 1996 (Chile)
      • China GB 50011-2001 (China)
      • China GB 50011-2010 (China)
      •  NSR - 10 (Colombia)
      •  DIN 4149:1981-04 (Germany)
      •  DIN 4149:2005-04 (Germany)
      •  IS 1893:2002 (India)
      •  NTC 2008 (Italy)
      • Mexico CFE Sismo 08 (Mexico)
      •  SBC 301:2007 (Saudi Arabia)
      •  SANS 10160‑4 2010 (South Africa)
      •  NCSE-02 (Spain)
      •  SIA 261/1:2013 (Switzerland)
      •  SIA 261/1:2014 (Switzerland)
      •  O.G. 23089 + O.G. 23390 (Turkey)
      •  IBC 2000 (USA)
      •  IBC 2009-ASCE/SEI 7-05 (USA)
      •  IBC 2012/15 - ASCE/SEI 7-10 (USA)
    • The following National Annexes are available for EN 1998‑1:
      •  NA to BS EN 1998-1:2004:2008 (United Kingdom)
      •  ÖNORM EN 1991-1-1:2011-09 (Austria)
      • Belgium NBN - ENV 1998-1-1: 2002 NAD-E/N/F (Belgium)
      • Cyprus CYS EN 1998-1/NA:2004 (Cyprus)
      •  CSN EN 1998-1/NA:2007 (Czech Republic)
      •  NF EN 1998-1-1/NA:2011 (France)
      •  DIN EN 1998-1/NA:2011-01 (Germany)
      •  UNI-EN 1991-1-1/NA:2007 (Italy)
      •  NS-EN 1998-1:2004+A1:2013/NA:2014 (Norway)
      •  NP EN 1998-1/NA:2009 (Portugal)
      •  SR EN 1998-1/NA:2004 (Romania)
      •  STN EN 1998-1/NA:2008 (Slovakia)
      •  SIST EN 1998-1:2005/A101:2006 (Slovenia)
    • Input of user-defined response spectra
    • Direction-relative response spectra approach
    • Manual or automatic selection of the relevant mode shapes for response spectra (5 % rule from EC 8 applicable)
    • Generated equivalent static loads exported into load cases separately for each mode and direction
    • Result combinations by modal superimposition (SRSS rule) and by direction superimposition (SRSS or CQC rule)
    • Signed results based on the dominant mode shape can be generated
  2. Input Data


    The input parameters of the selected standards are proposed by the program. Furthermore, it is possible to enter response spectra manually. Dynamic load cases define a direction of response spectra effects and the structure eigenvalues that are relevant for the analysis.

  3. Calculation parameters


    Equivalent static loads are generated separately for each relevant eigenvalue and excitation direction. They are exported to static load cases to perform the linear static analysis in RFEM/RSTAB.

  4. Equivalent loads from mode shapes


    The equivalent load analysis calculation generates load cases and result combinations. The load cases include the generated equivalent loads, which are subsequently superimposed in result combinations. First, the modal responses are superimposed with the SRSS or CQC rule.

    Afterwards, the directional components of earthquake actions are combined with the SRSS or the 100 % / 30 % rule.

Contact us


Do you have any questions about our products? Do you need advice for your current project? 
Contact us or find various suggested solutions and useful tips on our FAQ page.

+49 9673 9203 0


Customer Projects

Customer Projects designed by Dlubal Software products

Interesting customer projects designed with the structural analysis programs by Dlubal Software.

Price (VAT excl.)

760.00 USD

Price is only valid for the software usage in United States.

RSTAB Dynamic Analysis
DYNAM Pro - Natural Vibrations 8.xx

Add-on Module

Dynamic analysis of natural frequencies and mode shapes of member models

RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

RFEM Dynamic Analysis
RF-DYNAM Pro - Natural Vibrations  5.xx

Add-on Module

Dynamic analysis of natural frequencies and mode shapes of member, surface, and solid models

RSTAB Steel and Aluminium Structures
STEEL 8.xx

Add-on Module

Stress analysis of steel members

RSTAB Steel and Aluminium Structures
STEEL EC3 8.xx

Add-on Module

Design of steel members according to Eurocode 3

RFEM Steel and Aluminium Structures

Add-on Module

Stress analysis of steel surfaces and members

RFEM Steel and Aluminium Structures

Add-on Module

Design of steel members according to Eurocode 3

RFEM Concrete Structures

Add-on Module

Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

RFEM Concrete Structures
EC2 for RFEM 5.xx

Module Extension for RFEM

Extension of the modules for reinforced concrete design by the Eurocode 2 design


Add-on Module

Stability analysis according to the eigenvalue method

RSTAB Steel and Aluminium Structures
FE-LTB 8.xx

Add-on Module

Lateral-torsional buckling analysis of members according to the second-order analysis (FEM)