Strengthening and Cost Efficiency of GFRP-Reinforced Bridge Deck Slabs: A Case Study
Received: 8 December 2025 | Revised: 24 January 2026 | Accepted: 4 February 2026 | Online: 4 April 2026
Corresponding author: Mardiana Amir
Abstract
Bridges are essential for national and regional connectivity, yet their deck slabs often deteriorate over time due to excessive loads, material fatigue, and environmental exposure, potentially reducing their structural safety. This study evaluates (1) the structural performance improvement of the Pute Bridge-river deck slab after strengthening with Glass Fiber Reinforced Polymer (GFRP) and (2) the cost efficiency of GFRP compared to conventional slab replacement. The methodology involved structural modeling using the SAP2000 v22, static load testing using a Deflection Multimeter (DMM), and cost analysis based on Analisa Harga Satuan Pekerjaan (AHSP) translated as Unit Price Analysis. The results indicate a 20.80% increase in load capacity (from 274 to 331 tons) and over 90% reduction in deflection at critical points, with mid-span deflection decreasing from -66.70 mm to -3.50 mm. Economically, GFRP strengthening costs 518,792,152.60 Rp, making it 28.62% more economical than slab replacement. Overall, GFRP proves both technically effective and cost-efficient, making it a significant solution for bridge deck slab rehabilitation due to its time efficiency, minimal traffic disruption, and long-term durability.
Keywords:
bridge deck slab, structural strengthening, GFRP, load testing, building design, cost efficiencyDownloads
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Copyright (c) 2026 Mardiana Amir, Andi Muhammad Subhan, Nur Irmadayanti Idris, Mega Shine Payungallo, Bagus Guritno, Miswar Tumpu, Hoong-Pin Lee
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