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| Two scale study on mechanical properties of concrete based on the reduced order homogenization theory |
| Received:July 30, 2015 Revised:September 28, 2015 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201606019 |
| KeyWord:concrete reduced order homogenization theory random aggregate model mesoscale mecha-nics two-scale method static compress |
| Author | Institution |
| 陈东东 |
南京理工大学 智能弹药技术国防重点学科实验室, 南京 |
| 张先锋 |
南京理工大学 智能弹药技术国防重点学科实验室, 南京 ;解放军理工大学 爆炸冲击防灾减灾国家重点实验室, 南京 |
| 郭磊 |
南京理工大学 智能弹药技术国防重点学科实验室, 南京 |
| 邓佳杰 |
南京理工大学 智能弹药技术国防重点学科实验室, 南京 |
| 高飞 |
南京理工大学 智能弹药技术国防重点学科实验室, 南京 ;解放军理工大学 爆炸冲击防灾减灾国家重点实验室, 南京 |
| 何勇 |
南京理工大学 智能弹药技术国防重点学科实验室, 南京 |
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| Abstract: |
| Mesoscale characteristics of concrete have considerable influence on its macroscale mechanical properties.In this paper,a random aggregate model,which followed the probability distribution of real structure,was established and used in FEM analysis to investigate relationship between the mesoscale characteristics and macroscale mechanical properties.Concrete was considered as a composite composed of aggregate,mortar and the ITZ (Interfacial Transition Zone) phase for simplification.Algorithms for generating,distributing and meshing of random convex polyhedrons were programmed.Reduced order homogenization theory was proposed to reduce the calculation capacity with the mesoscale model,by which the mesoscale model of concrete was preprocessed and a two-scale algorithm was constructed.Uniaxial static compression simulations of concretes with different strengths were conducted with the two-scale algorithm.It was shown that the two-scale simulation results agreed well with both the experimental results and the mesoscale simulation results.The reduced order homogenization theory was proved to possess both high efficiency and high accuracy in multiple scale analysis of concrete. |
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