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Response Spectrum Analysis for RSTAB 9

Response Spectrum Analysis for RSTAB 9

Forces of nature are a natural enemy of every structural engineer. But don't worry, you can perform your calculations in advance in the event of an earthquake. The Response Spectrum Analysis add-on will help you with this. It performs seismic analyses using the multi-modal response spectrum method. You can create the response spectra required for this in compliance with the standards or user-defined. The program uses them to generate the equivalent static forces.

The add-on includes even more for you; for example, an extensive library of accelerograms from seismic zones. You can use them to generate the response spectra as well.

Note: The seismic analysis using the multi-modal response spectrum analysis requires the analysis of natural vibrations in the Modal Analysis add-on.

Banner | Response Spectrum Analysis for RSTAB 9

Extension of Modal Analysis for Multi-Modal Response Spectrum Analysis

Total items: 4
Response Spectrum Analysis - System
  • 3D Viewer
  • 3D Viewer | Babylon
  • Virtual Reality
  • General
  • Response Spectrum Analysis for RFEM 6
  • Response Spectrum Analysis for RSTAB 9
    • Dynamic and Seismic Analysis
    • Eurocode 8

Response Spectrum Analysis | Features

  • Response spectra of the following standards are implemented:
    • European Union | Flag EN 1998-1:2010 + A1:2013 (European Union)
    • DE | Flag DIN 4149:2005-04 (Germany)
    • Switzerland | Flag SIA 261:2020-08 (Switzerland)
    • Switzerland | Flag SIA 261:2014-07 (Switzerland)
    • Australia | Flag AS 1170.4: 2018-02 (Australia)
    • EN-US | Flag ASCE 7 | 2022 - IBC | 2024 (USA)
    • EN-US | Flag ASCE 7 | 2016 - IBC | 2018/21 (USA)
    • EN-US | Flag ASCE 7 | 2010 - IBC | 2012/15 (USA)
    • EN-US | Flag ASCE 7 | 2005 - IBC | 2009 (USA)
    • EN-US | Flag IBC 2000 (USA)
    • Mexico Flag CFE Sismo:2015-07 (Mexico)
    • Argentina CIRSOC 103:2013-07 (Argentina)
    • DTR-BC 2-48: 2003 (Algeria)
    • People's Republic of China | Flag GB 50011-2010-12 (China)
    • India | Flag IS 1893:2016-12 (India)
    • Canada | Flag NBC 2020 (Canada)
    • Canada | Flag NBC 2015 (Canada)
    • NCh 433: 2009 (Chile)
    • Spain Flag NCSE 02:2009 (Spain)
    • Flag of the Netherlands NPR 9998:2020-12 (Netherlands)
    • Colombia NSR-10: 2010-10 (Colombia)
    • Italy Flag NTC 2018-01 (Italy)
    • Romania Flag P 100-1:2013-08 (Romania)
    • South Africa Flag SANS 10160-4:2017-02 (South Africa)
    • Saudi Arabia SBC 301:2018 (Saudi Arabia)
    • Turkey TBEC:2018 (Türkiye)
  • The following National Annexes according to EN 1998‑1 are available:
    • DE | Flag DIN EN 1998-1/NA:2023-11 (Germany)
    • Austria | Flag ÖNORM EN 1998-1/NA:2017-07 (Austria)
    • Switzerland | Flag SN 1998-1/NA:2019-12 (Switzerland)
    • European Union | Flag 1998-1/NA:2013-05 (European Union)
    • Bosnia and Herzegovina BAS EN 1998-1/NA:2018 (Bosnia and Herzegovina)
    • Bulgaria | Flag BDS 1998-1/NA:2012-03 (Bulgaria)
    • EN-GB | Flag BS EN 1998-1/NA:2008-08 (United Kingdom)
    • CS | Flag CSN EN 1998-1/NA:2016-09 (Czech Republic)
    • Cyprus Flag CYS EN 1998-1/NA:2009-03 (Cyprus)
    • Greek Flag ELOT EN 1998-1/NA:2015-04 (Greece)
    • Croatia Flag HRN EN 1998-1/NA:2011-06 (Croatia)
    • Lithuania Flag LST EN 1998-1/NA:2010-12 (Lithuania)
    • Luxemburg Flag ILNAS EN 1998-1/NA:2011-09 (Luxembourg)
    • Latvia Flag LVS EN 1998-1/NA:2015-01 (Latvia)
    • Malaysia Flag MS EN 1998-1/NA:2017-01 (Malaysia)
    • Hungary Flag MSZ EN 1998-1/NA:2013-07 (Hungary)
    • Belgium Flag NBN EN 1998-1/NA:2011-10 (Belgium)
    • France Flag NF EN 1998-1/NA:2013-12 (France)
    • Portugal Flag NP EN 1998-1/NA:2010-03 (Portugal)
    • Norway Flag NS EN 1998-1/NA:2021-06 (Norway)
    • Slovenia Flag SIST EN 1998-1/NA:2009-01 (Slovenia)
    • Romania Flag SR EN 1998-1/NA:2008-11 (Romania)
    • Serbia SRPS EN 1998-1/NA:2018-12 (Serbia)
    • Singapore Flag SS EN 1998-1/NA:2013-02 (Singapore)
    • Slovakia Flag STN EN 1998-1/NA:2009-04 (Slovakia)
    • Spain Flag UNE EN 1998-1/NA:2020-01 (Spain)
    • Italy Flag UNI EN 1998-1/NA:2013-03 (Italy)
  • User-defined response spectra or those generated from accelerograms
  • Direction-relative response spectrum approach
  • Manual or automatic selection of the relevant mode shapes of response spectra (5% rule of EC 8 applicable)
  • Result combinations by modal superimposition (SRSS or CQC rule) and by direction superimposition (SRSS or 100% / 30% rule)
  • Accidental torsional actions can be taken into account automatically
  • Signed results based on the dominant mode shape can be displayed
Spectral Analysis Settings
Scaled Sums Envelope
  • 3D Viewer
  • 3D Viewer | Babylon
  • Virtual Reality
  • General
  • Response Spectrum Analysis for RFEM 6
  • Response Spectrum Analysis for RSTAB 9
    • Dynamic and Seismic Analysis
    • Eurocode 8

Response Spectrum Analysis | Input

The Dlubal structural analysis software does a lot of work for you. The input parameters, which are relevant for the selected standards, are suggested by the program in accordance with the rules. Furthermore, you can enter response spectra manually.

Load cases of the type Response Spectrum Analysis define the direction in which response spectra act and which eigenvalues of the structure are relevant for the analysis. In the spectral analysis settings, you can define details for the combination rules, damping (if applicable), and zero-period acceleration (ZPA).

Assigning Response Spectrum
Scaled Sums Envelope
  • 3D Viewer
  • 3D Viewer | Babylon
  • Virtual Reality
  • Calculation
  • Response Spectrum Analysis for RFEM 6
  • Response Spectrum Analysis for RSTAB 9
    • Dynamic and Seismic Analysis
    • Eurocode 8

Response Spectrum Analysis | Calculation

Did you know that Equivalent static loads are generated separately for each relevant eigenvalue and excitation direction. These loads are saved in a load case of the Response Spectrum Analysis type and RFEM/RSTAB performs a linear static analysis.

Scaled Sums Envelope
  • 3D Viewer
  • 3D Viewer | Babylon
  • Virtual Reality
Response Spectrum Analysis - System
  • 3D Viewer
  • 3D Viewer | Babylon
  • Virtual Reality
Response Spectrum Analysis - Printout Report
  • 3D Viewer
  • 3D Viewer | Babylon
  • Virtual Reality
  • Results
  • Response Spectrum Analysis for RFEM 6
  • Response Spectrum Analysis for RSTAB 9
    • Dynamic and Seismic Analysis
    • Eurocode 8

Response Spectrum Analysis | Results

The load cases of the type Response Spectrum Analysis contain the generated equivalent loads. First, the modal contributions have to be superimposed with the SRSS or CQC rule. In this case, you can use the signed results based on the dominant mode shape.

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

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3D structural frame & truss analysis software | Get started quickly with RSTAB 9, featuring a modular concept and multi-purpose add-ons 3D structural frame & truss analysis software | Get started quickly with RSTAB 9, featuring a modular concept and multi-purpose add-ons

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Downloadable technical model templates for precise engineering analysis. Downloadable technical model templates for precise engineering analysis.
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