基于界面等效模型的再生混凝土基面力元分析Analysis of recycled concrete base force element based on interface equivalent model
孟德泉;应黎坪;杨欣欣;
摘要(Abstract):
从细观角度分析再生混凝土的力学特性,以往都是将再生混凝土视为由骨料、新砂浆、新界面、老砂浆、老界面五相介质组成的复合材料来分析,为了简化这种常规五相再生混凝土模型,提出了基于界面等效模型的再生混凝土基面力元分析方法。首先运用三相球理论模型将再生混凝土中的老砂浆、新界面、老界面三相介质等效成一种介质,得到三相介质的再生混凝土界面等效模型;然后利用势能原理的基面力元法编制出损伤基面力元程序,对不同尺寸的再生混凝土试块进行单轴拉伸试验模拟。给出了应力-应变曲线及破坏过程图,并与普通五相模型进行了对比,两种曲线基本吻合。因此,等效模型可以代替普通五相模型,从而简化多相再生混凝土的损伤分析,提高模拟效率。
关键词(KeyWords): 混凝土与钢筋混凝土结构;再生混凝土;三相球模型;界面等效模型;基面力元法
基金项目(Foundation):
作者(Author): 孟德泉;应黎坪;杨欣欣;
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参考文献(References):
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