Evaluation of long-term behavior of PC member based on fracture in local portion

2015 Fiscal Year Final Research Report

• Project/Area Number: 25709037
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: Railway Technical Research Institute
• Principal Investigator: WATANABE KEN 公益財団法人鉄道総合技術研究所, 構造物技術研究部, 主任研究員 (40450746)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: プレストレストコンクリート / 収縮クリープ / 鉄筋 / 残留応力 / 画像相関法 / 高速化 / ひび割れ / ストラット

Outline of Final Research Achievements

The objective of this study is to evaluate the contribution of shrinkage and creep of concrete on life of concrete subjected to sustained loading by using the digital image-correlation method. The high-speed image correlation algorism for concrete fracture was developed. The stress caused by shrinkage of mortar was calculated based on thick cylinder theory and strain measured by using the digital image-correlation method. Then, the effect of the stress on the cracking load of mortar was evaluated. In addition, the digital image-correlation method evaluated the area where the minimum principle strain was occurred drastically in the loaded PC beam with diagonal cracks.

Free Research Field

コンクリート工学