Study of live load parameters of highway bridges

bridges;  truck configuration;  Maximum load parameters;  Truck co-occurrence probability

In the study of ultimate bearing capacity and reliability of highway bridge structures, since there are no statistical parameters of vehicle load in the specification, reliability analysis cannot be carried out directly, so it is necessary to first study the statistical parameters of load and loading model. Based on the WIM data obtained from a two-week statistical survey conducted by the British Transport Research Laboratory in 1990, the analysis program was compiled using Microsoft Visual Basic (version 2.6), and the five most common trucks were first calculated according to the probability of the occurrence of various vehicles; Then, the probability of multiple trucks appearing on the bridge at the same time when their configuration, axle load, total weight and bridge span are variables. The statistical results can be directly used for the reliability analysis of bridge structural system.