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

摘要

This article describes the development and implementation of a computer-based remote monitoring system for the temperature monitoring of an 11 span segmental, post-tensioned concrete box-girder bridge. Monitoring has been carried out for 5 years. The extensive data collected is analyzed using software that has been 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 has been used to determine the maximum and the minimum bridge temperatures, the vertical temperature differences through the bridge cross section, and the horizontal temperature differences in the transverse directions. Comparisons have been 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 article shows the benefits from using a computer-based monitoring system to provide a continuous evaluation of data collected on the bridge.