STRUCTURAL HEALTH MONITORING SYSTEM PLANNING FOR CABLE-STAYED BRIDGES: A CASE STUDY OF PULAU BALANG BRIDGE

• Main Author: Ramadhani, Sofyan
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/73715
• Institution: Institut Teknologi Bandung

<p align="justify">Structural Health Monitoring System (SHMS) is a crucial aspect in ensuring the sustainability and safety of bridges. However, the sensor configuration in SHMS is often not based on a systematic approach, leading to excessive or insufficient data. Other challenges include sensor damage, limited human resources, and difficulties in data evaluation due to an excessive number of sensors. Furthermore, there is a lack of detailed regulations regarding sensor placement, optimal sensor types and quantities, and performance-based maintenance guidelines for SHMS in Indonesia. Budget constraints for SHMS maintenance also pose a significant challenge. In this study, a reevaluation of the SHMS at Pulau Balang Bridge was conducted, taking into account design changes and actual cable-stayed forces. The Analytic Hierarchy Process (AHP) method was employed to determine sensor priorities based on the criticality and vulnerability of the structure. Tiltmeter and accelerometer sensor placement was studied using the Optimal Sensor Placement (OSP) method to achieve an optimal number and location of sensors. The objectives of this research is to conduct an academic study to determine the priority of sensors for the design of a real-time monitoring system for Pulau Balang Bridge, considering the bridge's performance, as well as the initial investment, operational, and maintenance budget requirements. Additionally, an investigation was conducted to identify other priority sensors that complement the bridge's condition information. Furthermore, an operational and maintenance concept for SHMS based on performance was formulated specifically for Pulau Balang Bridge. The research findings indicate that the minimum required sensor priorities for real-time structural monitoring include a 3-axis accelerometer for deck acceleration measurement, a 2-axis accelerometer for cable forces, a tiltmeter for deck deflection, GPS for pylon displacement, and a jointmeter for settlement measurement. Additional sensors such as CCTV Type I, anemometer, thermometer, ATRH (Ambient Temperature and Relative Humidity), and CCTV Type II are recommended to complement the bridge's condition information. Subsequently, an operational and maintenance concept for SHMS based on performance was developed. This concept includes clear work division, standard operating procedures, and timely follow-up targets in SHMS operations. Monitoring tasks are distributed at the regional and central levels, with maintenance targets set to ensure a performance index above 70% for SHMS. Routine inspections, special inspections, and emergency inspections by SHMS service providers are also established. Additionally, the provision of backup sensors is emphasized to ensure continuous health monitoring of the bridge. By implementing an optimal SMKS plan and a well-defined operational and maintenance concept, it is anticipated that the SHMS at Pulau Balang Bridge can be effectively and sustainably operated. The outcomes of this research provide guidelines that can be applied to other bridges in Indonesia to enhance the performance of SHMS and ensure the long-term safety and health of bridge structures. Keywords: Structural Health Monitoring System (SHMS), Pulau Balang Bridge, Sensor Prioritization, Operational Concept, Maintenance.