The component temperature to be applied at the design time is determined automatically. You can adjust the coefficients used to determine the temperature. In this step, it is best for you to also select the hot-dip galvanizing. According to the DASt Guideline 027 "Determination of Component Temperature of Hot-Dip Galvanized Steel Components in Case of Fire", a lower emissivity of the steel surface is applied up to a limit temperature. Overall, this gives you a lower temperature for the thus more favorable fire resistance design.
Steel Design | Consideration of Hot-Dip Galvanizing of Structural Components for Steel Temperature Determination
- Calculation of deflections and comparison with the normative or manually adjusted limit values
- Consideration of a precamber for the deflection analysis
- Different limit values are possible, depending on the design situation type
- Manual adjustment of reference lengths and segmentation by direction
- Calculation of deflections related to the initial structure or to the deformed structure
- Further detailed design checks depending on the selected design standard (for example, limitation of web breathing according to EN 1993‑2)
- Graphical result display integrated in RFEM/RSTAB; for example, the design ratio of a limit value, the deformation, or the sag
- Complete integration of the results into the RFEM/RSTAB printout report
In RFEM/RSTAB, you have the option to generate and then calculate the load or result combinations required for the serviceability limit state. You can select these design situations for the deflection analysis in the Steel Design add-on. The calculated deformation values are determined accordingly at each location of a member, depending on the specified precamber and reference system. Finaly, you can compare these deformation values with the limit values.
Did you know? You can specify the deformation limit value individually for each structural component in Serviceability Configuration. Define the maximum deformation depending on the reference length as the allowable limit value. By defining design supports, you can segment the components in order to determine the corresponding reference length automatically for each design direction.
Based on the position of the assigned design supports, the distinction between beams and cantilevers is made automatically so the limit value can be determined accordingly.
You can find the serviceability limit state design checks in the result tables of the Steel Design add-on. You can display the design results with all the details at each location of the designed members. Furthermore, graphics are available for you with the result diagrams of the design ratios. This gives you a good overview.
You can also integrate all result tables and graphics into the global printout report of RFEM/RSTAB as a part of the steel design results. Thus, you can display and document the deformations of the entire structure as a part of the RFEM/RSTAB functionality independent of the add-on.
- Manual specification of critical component temperature or automatic determination of component temperature for desired duration
- A wide range of fire curves: standard temperature-time curve, external fire curve, hydrocarbon curve
- Manual adjustment of the essential coefficients for the determination of the steel temperature
- Consideration of hot-dip galvanizing of structural components for the determination of the steel temperature
- Results of a temperature-time diagram for the gas and steel temperature
- Fire protection cladding as a contour or a box cladding with temperature-independent materials can be considered when determining the temperature
- Design of members made of carbon steel or stainless steel
- Cross-section design checks and stability analyses (equivalent member method) according to EN 1993‑1‑2, Clause 4.2.3
- Design checks of the cross-sections of Class 4 according to EN 1993‑1‑2, Annex E.