Multi-scale durability mechanics of concrete structures deteriorated by gel-liquid expansion

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05531
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Takahashi Yuya 東京大学, 大学院工学系研究科(工学部), 講師 (10726805)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 耐久性力学 / アルカリ骨材反応 / 凍結融解作用 / 複合劣化 / 疲労

Outline of Final Research Achievements

In order to predict the structural behavior of reinforced concrete deteriorated by gel or liquid water expansion, new models are installed to the existing material-structural coupled calculation system. The chemo-mechanical models for the expansive alkali silica gel and the volumetric changes due to frozen pore water are developed. As a results, the integrated calculation system can deal with the durability mechanics of concrete structures including the problem of combined deterioration of alkali silica reaction and freeze-thaw cycles. With the developed calculation system, the method to predict the fatigue lives of existing deteriorated reinforced concrete are proposed with the combination of simulation techniques and non-destructive testing methods.

Free Research Field

工学