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요약정보
基于颗粒流的水工混凝土材料宏观力学及细观破坏特征研究
Resource Type
Academic Journal
Authors
鲁洪
Source
水利科学与寒区工程 / Hydro Science and Cold Zone Engineering
. 5(8):38-42
Subject
颗粒流
混凝土
力学
细观特征
Language
Chinese
ISSN
2096-5419
Online Access
Find it @ DONGA
초록
为研究某水库混凝土材料宏、细观力学特征,采用PFC3D颗粒流模拟计算方法,开展了不同掺量的纤维体混凝土模型宏观力学与细观破坏特征分析.研究得到纤维体掺量不影响混凝土模型应力应变走向,且具有四阶段变化特征;当掺量低于1%时,混凝土强度随掺量为递增变化,反之,为递减变化,而峰值应变随掺量变化与强度变化呈相反.混凝土的变形破坏以剪切裂纹为主导,当掺量改变,不影响混凝土张拉裂纹数量,但剪切裂纹在掺量1%模型中为最低.混凝土的裂纹产生具有无序性,但以其中部为裂纹产生根源.混凝土破坏碎片的产生为递进性,即使在峰值应力后阶段,其仍具有承载能力;掺量1%模型破坏碎片尺寸为最小,抵抗裂纹碎片扩展能力最强,能够适配水库各类设施建设.
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