Use of Mobile Measuring System for Bridge Monitoring

ABSTRACT: Continuous monitoring of bridges provides information on the bridge condition and permits to forecast structural deterioration. This allows for prompt measures of repair and rehabilitation to be timely taken and ensures the reliable functioning of a given bridge. Monitoring was conducted with the aid of a mobile monitoring unit, the main advantages of which are its repeated utilization relative simplicity of installation and suitability for any period of the bridge’s life cycle. The system consists of displacement transducers and data loggers. As a result of the year-long monitoring it was found that the vertical displacements (40-50 mm) in the joint were only of seasonal character. Furthermore, unsatisfactory performance of the key joint was identified. It had manifested in discrete and delayed movements of up to a few hours as compared with the joints at the arch abutments. Replacement of the joints was fitted into the major repair schedule of 2006-2007. In major cities operational environment the reliability of bridge network is always critical. Therefore it is necessary to have full and detailed information on every structure that helps us forecast changes in their operating conditions in time. One of the methods of obtaining such information is the instrumental monitoring tha