Bewertung der Sicherheitsanforderungen von Temperatureinwirkungen auf Brücken

Validation of the safety coefficients for thermal load on bridges.

This paper covers basic analysis for the determination of partial safety coefficients for thermal loads on bridges. Long-term numerical simulations were performed to achieve an appropriate database for reliable predictions. The calculations were based on typical bridge cross-sections in steel, composite and concrete constructions and representative weather scenarios. The weather data was provided for a continuous period of three years. The obtained limit values were determined on the basis of a fifty years recurrence by the use of limit value analysis. Considering the characteristic values of DIN-Fachbericht 101 for thermal load the estimated limit values were integrated analog to practical use into the semi-probabilistic safety concept. Therefore it was possible to keep the well established concept of calculating the thermal load unchanged, while the scatter range was covered by a safety margin.