Integrating real traffic variability into fatigue design

Method based on a Monte Carlo approach

The method involves generating random traffic flows, according to statistical distributions derived from real-world observations, incorporating truck weights, inter-vehicle distances, traffic flow types (free or congested), and lane type (fast or slow).

Verification using finite element analysis

he simulated loads are fed into a finite element model to calculate the structural response and cumulative damage according to the Eurocode SN curves.

Sensitivity to traffic parameters

Results show that certain parameters strongly influence fatigue estimates, particularly for long-span structures. Adjusting the statistical distribution parameters improves the temporal consistency of the simulations.

This work demonstrates the relevance of integrating realistic random traffic for rigorous fatigue verification, using a flexible, transferable method compatible with European practice.

Read the full article in English – IABSE Congress 2023 (PDF)