Meso-heterogeneity mechanism of the concrete size effect of tension and compression strength - 文章详情页

作者：

Du, M. (Du, M..) | Du, X. (Du, X..) | Jin, L. (Jin, L..) (学者：金浏) | Lu, A. (Lu, A..)

收录：

Scopus PKU CSCD

摘要：

In　order　to　reveal　the　size　effect　meso-heterogeneity　mechanism　of　concrete　strength,　the　meso-element　equivalent　heterogeneity　model　was　established.　Tension　and　compression　tests　were　simulated　for　different　size　meso-heterogeneity　models.　The　results　showed　that　the　size　effect　of　concrete　is　rooted　in　the　meso-heterogeneity　mechanism　of　materials.　With　the　increase　of　model　size,　the　variation　coefficient　of　meso-element　elastic　modulus　increases　and　meso-heterogeneity　of　concrete　heightened.　Also,　more　low-strength　units　or　defects　were　discovered　in　the　large-size　model.　As　a　result,　the　tension　and　compression　strength　of　concrete　and　the　ultimate　strain　decreased　and　the　brittleness　of　concrete　strengthened.　Concrete　damage　region　extended　from　the　concentrated　area　to　multiple　non-penetrating　crack　zones.　©,　2015,　Tumu　Jianzhu　yu　Huanjing　Gongcheng/Journal　of　Civil,　Architectural　and　Environmental　Engineering.　All　right　reserved.

关键词：

Concrete; Failure mode; Meso-element equivalent model; Meso-heterogeneity; Strength size effect

作者机构：

[ 1 ] [Du, M.]The Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Du, M.]Institute of Disaster-prevention Science and Technology, Sanhe, 065201, China
[ 3 ] [Du, X.]The Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Jin, L.]The Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing, 100124, China
[ 5 ] [Lu, A.]The Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing, 100124, China

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