Establishment of residual strength evaluation system and corrosion prediction of weathering steel bridges based on wind conditions and local environmental factors

• Project/Area Number: 23560564
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Nagaoka University of Technology
• Principal Investigator: IWASAKI EIJI 長岡技術科学大学, 工学(系)研究科(研究院), 教授 (10223380)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: 鋼構造 / 耐候性鋼材 / 腐食予測 / 余耐力

Research Abstract

Observation of airborne salt as a regional environment and geomorphological environment in the target bridge, observation of airborne salt in the local environment of the target bridge, measurement of the amount of corrosion due to exposure test pieces and comparison of the observed values of airborne salt and airborne salt of the bridge around by numerical simulation have been carried out, in order to establish a system for estimating the amount of corrosion and airborne salt around the bridge section from the structural specifications of the bridge, wind speed and direction and airborne salt of bridge construction point.