Analysis of structural bridge vibration under random load data from weighing station Dau Giay

Abstract

This article introduces the analysis of vibration and dynamic impact factor (DIF) of displacement in the case of a bridge structure subjected to random vehicle loads. The actual vehicle load data was collected at the Dau Giay weigh station, and a random variable initialization algorithm was used to generate a random dataset of 3-axle loads. The study performed 10,000 simulations to analyze the Suoi Khoet bridge on the Phan Thiet - Dau Giay highway in Vietnam. The results showed that the relationship between input and output loads is highly complex and non-monotonic. The probability distribution of the random variable is also highly complex. Most of the DIF results are higher than the values currently applied in bridge design processes in Vietnam according to TCVN11823-13:2017 standards. This needs to be taken into account during the design and construction of bridges.

Keywords: Vibration, Dynamic impact factor (DIF); random vehicle loads; Suoi Khoet bridge.