Experimental study for buckling strength of severe corroded steel members considering performance recovery - For the remaining strength estimation and repair design -

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420494
• 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: Tokuyama College of Technology
• Principal Investigator: KAITA TATSUMASA 徳山工業高等専門学校, 土木建築工学科, 准教授 (10390519)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 鋼構造 / 腐食 / 残存耐荷力 / 座屈実験 / 有限要素解析 / 残存板厚評価 / 性能回復 / トラス橋

Outline of Final Research Achievements

This study has 3 main contents ((1) flexural buckling test of corroded steel column (2) ultrasonic thickness measurement (3) finite element analyses of an aging truss bridge) for obtaining the useful knowledge of bridge maintenance, which includes thickness inspection and repair, for the actual corroded bridge members. Main results of this study are as follows;
(1) From the flexural buckling test and UT measurement, a simple thickness estimation formula was proposed for modifying measurement results, which will be overestimated than actual thickness due to surface roughness, to safe side.
(2) From the analytical results of whole bridge model, the load bearing capacity of an actual aging truss bridge was estimated based on the concept of scale factor of B live load.

Free Research Field

工学