ESTIMATION OF TRAFFIC VIBRATION LEVEL FOR EXISTING BRIDGE BY USING ARMA MODEL

Abstract

The vector ARMA model is structured by the contrability transformation of the discrete state equation for the dynamic equation of a highway bridge. Structural identification for the vector ARMA model is performed by the impulse testing using least-squares method. The discrete bridge-vehicle system equation is constructed by the vector ARMA model of bridge generated by the experiment and discrete vehicle equation. The covariance equation for the discrete bridge-vehicle-road surface model is derived. Authors proposed the estimation method for the bridge vibration level (r.m.s. value).