赵江涛
赵江涛.基于Drucker-Prager准则的再生混凝土破坏研究[J].混凝土与水泥制品,2022(6):27-30,36.
ZHAO J T.Study on Failure of Recycled Concrete Based on Drucker-Prager Criterion[J].China Concrete and Cement Products,2022(6):27-30,36.
基于Drucker-Prager准则的再生混凝土破坏研究
赵江涛
赵江涛.基于Drucker-Prager准则的再生混凝土破坏研究[J].混凝土与水泥制品,2022(6):27-30,36.
ZHAO J T.Study on Failure of Recycled Concrete Based on Drucker-Prager Criterion[J].China Concrete and Cement Products,2022(6):27-30,36.
基于Drucker-Prager准则对C30、C40再生混凝土动、静态荷载作用下的破坏机理与破坏形式进行了分析。结果表明:在静态荷载作用下,再生混凝土的破坏过程可分为四个阶段,主要表现为由脆性破坏向塑性破坏的转变;动态荷载对再生混凝土的动态抗压强度具有增强效应;在动态荷载作用下,再生混凝土主要表现为粉碎破坏,并随着冲击气压的增加,粉碎程度提高,再生混凝土的应力-应变曲线均呈先上升后下降的趋势,且上升段的斜率随冲击气压的增加而增大,而下降段的斜率相似,总体呈现从应变硬化发展为应变软化的现象。
Based on the Drucker-Prager criterion, the failure mechanism and failure form of C30 and C40 recycled concrete under dynamic and static loads were analyzed. The results show that under static loads, The failure process of recycled concrete can be divided into four stages, mainly manifested as the transition from brittle failure to plastic failure. Dynamic load has an enhancement effect on the dynamic compressive strength of recycled concrete. Under the action of dynamic load, the main performance of recycled concrete is crushing failure, and the crushing degree increases with the increase of impact air pressure. The stress-strain curves of recycled concrete all show a trend of rising first and then falling, and the slope of the ascending section increases with the increase of the impact air pressure, while the slope of the descending section is similar, and the phenomenon of developing from strain hardening to strain softening is generally exhibited.
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