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基于MPS方法的自密实混凝土流动数值模拟
Numerical Simulation of Self compacting Concrete Flow Based on MPS Method
投稿时间:2018-11-19  
DOI:103969/j.issn1007 9629202002011
中文关键词:  自密实混凝土  宾汉姆流变模型  数值模拟  MPS  L形箱试验  V形漏斗试验
英文关键词:self compacting concrete(SCC)  Bingham rheological model  numerical simulation  MPS  L box test  V funnel test
基金项目:国家自然科学基金资助项目(11772351)
           
作者单位
李敬军
LI Jingjun
中国农业大学水利与土木工程学院,北京100083
College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
田雷
TIAN Lei
中国农业大学水利与土木工程学院,北京100083
College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
邱流潮
QIU Liuchao
中国农业大学水利与土木工程学院,北京100083
College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
韩宇
HAN Yu
中国农业大学水利与土木工程学院,北京100083
College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
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中文摘要:
      采用三维移动粒子半隐式(MPS)法来分析和预测自密实混凝土(SCC)的流动性,对L形箱试验进行数值模拟,对比分析了数值模拟与试验中SCC的流动形态和流动时间.在此基础上,研究了L形箱试验和V形漏斗试验中塑性黏度对SCC流动性的影响,并建立了SCC密度和塑性黏度与V形漏斗试验下落时间的关系.结果表明:使用基于Bingham流变模型的MPS方法可以较好地模拟SCC的流动特性,且精度较高;MPS方法可以对SCC在施工过程中的流动时间和流动形态进行模拟预测,结合流变参数分析可以为SCC工程的设计和施工实践提供参考依据.
英文摘要:
      In order to study and predict the flow performance of the self compacting concrete(SCC) in the formwork, a simulation method of the moving particle semi implicit method(MPS) based on the Bingham rheological model was used to simulate the pouring process of SCC under the self gravity action. The result was compared with the flow time and flow pattern of L box flow in laboratory. By using this method, effects of plastic viscosity on the flow state of SCC in the L box experiment and the V funnel experiment was studied. The relationship between the density of SCC, the plastic viscosity and the falling time of the V funnel experiment was established. The results show that the MPS method based on the Bingham rheological model is feasible for the flow simulation of the self compacting concrete, and the simulation results have high accuracy. Therefore, the method proposed can be used to predict the flow time and flow pattern of concrete in the template, and the analysis of the rheological parameters can provide the basis for the design of SCC mix ratio in the construction practice.
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