Implementation of a Structural Health Monitoring System on the Mosteirô Bridge for BrIMe-Based Management

Abstract

This paper presents the implementation of a Structural Health Monitoring system on the Mosteirô Bridge, designed by Professor Edgar Cardoso and built in 1973. The monitoring system aims to support the digital transition of bridge management by integrating sensor data into BrIMe (Bridge Information Modelling enhanced) platforms. The first phase of the project involves the identification and planning of critical sections to be monitored, based on structural behaviour and accessibility. The selected monitoring sections include measurements of: (i) vertical and horizontal displacements at expansion joints near the abutments, (ii) strain at predefined transverse critical sections, (iii) rotations at the top of the piers, (iv) concrete temperature, (v) ambient temperature, and (vi) relative humidity. A network of sensors was installed to enable automated and continuous data acquisition. The system includes displacement transducers, strain gauges, inclinometers, and environmental sensors, all connected to a remote data logging and transmission unit. This configuration allows for real-time monitoring and long-term data storage, supporting both routine inspections and emergency assessments. The collected data will be processed and exported to BrIMe-compatible formats, enabling integration with geometric and structural models. This linkage enhances the bridge’s digital representation and supports predictive maintenance strategies, structural diagnostics, and decision-making processes. The paper discusses the technical specifications of the monitoring system, the criteria for selecting critical sections, and the methodology for data integration into BrIMe. The approach demonstrates how sensor-based monitoring can be effectively combined with digital modelling to improve infrastructure management and extend the service life of existing structures.