1. Serviceability assessment according to SBRA Lucia Csóková Structural Mechanics Division Department of Civil Engineering VŠB – TU Ostrava Czech Republic

2. 1986 ASCE Ad Hoc Committee STRUCTURAL SERVICEABILITY: A CRITICAL APPRAISAL AND RESEARCH NEEDS By the Ad Hoc Committee on Serviceability Research, Committee on Research of the Structural Division As standards evolve toward probability-based limit states design methods, serviceability issues are expected to become an increasingly important design consideration. Design Loads and Load Combinations Consistent probability-based loads and load combinations should be developed for checking applicable serviceability limit states. Structural Load Modeling Simple load models that can be used for analyzing creep, differential settlement, and cracking should be developed.

3. SBRA Method = Response to the recommendations contained in the ASCE Report

4. SBRA CRC Press, Inc. Boca Raton, Florida 1995 P f = (Yellow)/(Green) P f < P d

5. Target Probability P d according to CSN 73 1401-1998

6. Steel cantilever beam exposed to a combination of loads EXAMPLE Assessment according to EC Serviceability Assessment of a Steel Cantilever (“Sharp” Limit L/250)

7. Load Duration Curves and corresponding Histograms

8. Serviceability Assessment of a Steel Cantilever (“Sharp” Limit L/250) EXAMPLE 1 P f = 0.054 < P d = 0.07

9. The SBRA method, using Monte Carlo simulation in designer‘s work, allows for considering a qualitative improvement of the Serviceability Assessment. SUMMARY

10. http://www.itam.cas.cz/SBRA For more information see please the Internet Home Page Thank you for your attention