IDENTIFIKASI CEPAT PARAMETER DINAMIK JEMBATAN RANGKA BAJA BERBASIS LOW-COST SENSOR
Keywords:
structural health monitoring, ambient vibration test, smartphone accelerometer, damping ratio, bridge inspectionAbstract
Bridges are vital transportation infrastructures subject to dynamic loads from traffic and environmental influences, which can degrade structural performance over time. Conventional structural health monitoring (SHM) systems are often limited by cost and complexity. This study investigates the use of embedded smartphone accelerometers and the ambient vibration test (AVT) method to identify dynamic parameters of steel truss bridges in Ketapang, West Kalimantan. The study employs a non-destructive, low-cost approach by using daily traffic as a natural excitation source. Several bridges were selected based on service lifetime, visible damage, and functional condition. Data collection was performed using the Resonance Android application, which records acceleration and processes it into frequency spectra. Dominant frequencies and damping ratios were extracted from the results. Field measurements on Pawan 1 and Pawan 2 bridges indicate that several dynamic parameters, including frequency, displacement, and damping ratio, exceed standard limits, suggesting possible structural degradation. These findings demonstrate that smartphone-based monitoring can provide preliminary diagnostic insights and support decisions for more advanced, cost-intensive evaluations.
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Indonesian Society of Applied Science (ISAS)
