Development of Computer-Based System for the Temperature Monitoring of a Post-Tensioned Segmental Concrete Box-Girder Bridge

Abstract

This paper describes the development and implementation of a computer-based remote monitoring system for temperature monitoring of an 11-span segmental, post-tensioned concrete box-girder bridge. Monitoring was carried out for 5 years. The extensive data collected is analyzed using software developed to provide engineers with information that can be used in the evaluation of the long-term behavior and performance of the bridge. The software was used to determine the maximum and minimum bridge temperatures, vertical temperature differences through the bridge cross section, and horizontal temperature differences in the transverse directions. Comparisons are made with design specification provisions and with recommendations proposed by previous researchers. In addition, software has been developed to determine the relationship between the daily maximum temperature differences and the air temperatures inside the box-girder. This approach is also used to develop the relationship between the maximum stresses due to temperature differences and the air temperature inside the box-girder. This paper shows the benefits from using a computer-based monitoring system to provide a continuous evaluation of data collected on the bridge.