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FAQ 004193 | Why are the imperfections taken into account in RFEM and RSTAB when calculating according to the linear static analysis, even though the definition says that no deformations of structural components are considered according to the linear static analysis?
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Why are the imperfections taken into account in RFEM and RSTAB when calculating according to the linear static analysis, even though the definition says that no deformations of structural components are considered according to the linear static analysis?Answer
In general, the imperfection describes the incompleteness of a structure or the deviation from an ideal shape caused by the production. There are different ways to simulate the imperfection. In RFEM and RSTAB, the imperfections are modeled as equivalent loads. The definition of the equivalent loads is shown in Figure 01, and is taken from [1]. The same is described in EC 3 [2]. Since these are the equivalent loads that are dependent on the axial force, they are also considered in the calculation according to the linear static analysis. It is recommended to manage loads and imperfections in separate load cases. They can be combined in an appropriate way with each other in load combinations. The load cases with pure imperfections have to be categorized as the "Imperfection" action type in General Data of the load cases (see Figure 02).Keywords
Dlubal FAQ Imperfection Linear static analysis Internal forces Frequently Asked Question FAQ about Dlubal Question and Answer about Dlubal
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Transfer of printout report templates and report headers
In RFEM, RSTAB, and SHAPE-THIN, you can create user-defined print templates ("Printout Report Template") and printout headers ("Report Headers"). These templates can also be transferred to other computers and used there.
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![Vertical Soil Stress According to Boussinesq [2]](/-/media/Images/website/img/000001-010000/009601-009700/009674.png?la=en-US&mlid=6A2CE5FBD4C1471CB9163F4CD95C1105&hash=80B938B2DF3D3FDF7E1E5C66B3E5FB6EBF289AB7)
![Distribution of Forces and Moments in Column Base According to [1]](/-/media/Images/website/img/000001-010000/009601-009700/009638.png?la=en-US&mlid=7D34CEAAE7354583A29169095622B515&hash=1C29D4703C59F464778B8861B097C4BCC2E2CBC1)
![System and Loading According to [1]](/-/media/Images/website/img/000001-010000/009601-009700/009634.png?la=en-US&mlid=F0F0A23924B8424CA1C2905961DF676B&hash=EB7EDB8B793523A4241420070F0B8F5E64C0935D)
![Distribution of Vertical Soil Stresses and Related Settlement under Uniformly Distributed Load from [2]](/-/media/Images/website/img/000001-010000/009601-009700/009676.png?la=en-US&mlid=0F1EF7232A7141658DA9FC03757AD39F&hash=BC4A55AF6F77C73313D89995782F79D77570A8F7)
![Time-Dependent Settlement Components [2]](/-/media/Images/website/img/000001-010000/009601-009700/009673.png?la=en-US&mlid=136EB2E10159447D9AA4FCBA2CAAFFAC&hash=1233253845D187032D57D5E562CAFD1B03E2C11B)
![Case Distinction According to [1]](/-/media/Images/website/img/000001-010000/009401-009500/009458.png?la=en-US&mlid=9118EFFECFE84F8A8D9EB6620E643BDA&hash=A7E73FEA5085006945018966B2D643561B53EE9D)
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Structural Analysis Models for Download
Download numerous structural models (for example, RFEM, RSTAB, or RWIND files) to utilize them for training purposes or for your projects.
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- Why are my imperfections displayed graphically in different ways and can I adjust the display?
- What happens with the programs and add-on modules in the case of the timeout of a network license? And how can I increase the timeout?
- Why is it not possible to select a load case for design in the RF‑/STEEL add-on module, although it is defined in RFEM/RSTAB?
- Does the load generation also work for curved members?
- What are the possible effects of renumbering elements on the printout report and the add-on modules?
