Filtering Back Analysis Model of Elastic Modulus of U Channel Beam with Degraded Shell Element

Abstract

U channel beam is a kind of low height bridge. The application of concrete U channel beam is wide in highway and urban bridge. In general, it is composed of concrete and steel and compared with mechanical analysis, little research has been carried on the back analysis model of elastic modulus of U channel beam. With degraded solid element theory, the shell element is deduced and the displacement function is obtained. The necessary observation revision equation and Kalman regenerative matrix are derived. The Kalman filtering back analysis model steps of elastic modulus of the U channel beam are presented and the analytical procedure is compiled. Through analysis of a classic example, some important conclusions about filtering back analysis model of elastic modulus of U channel beam are obtained.