|
|
基于串联均质化模型的再生混凝土抗压强度和破坏机理分析
|
Abstract:
本文针对再生混凝土材料，利用均质化分析方法，建立了串联均质化模型，采用新型有限元法——基于余能原理的基面力单元法对再生混凝土进行细观层次的损伤研究，利用所编非线性损伤基面力单元法分析程序，分析了再生混凝土在单轴压缩荷载情况下的应力应变软化曲线和破坏机理，并将计算结果与试验和细观随机骨料模型分析方法的结果进行对比分析。研究结果表明：这种串联均质化分析方法可以用于分析再生混凝土材料的非线性损伤分析，可以得到再生混凝土材料的抗压强度、应力应变软化曲线和裂纹扩展的过程。
The homogenization analysis method was used to establish a series homogenization model for recycled concrete materials in the paper. A new type of finite element method—Base Force Element Method based on complementary energy principle is used to conduct meso-level damage research on recycled concrete. The stress-strain softening curve and failure mechanism of recycled concrete under uniaxial compression load are analyzed using the nonlinear damage analysis program of base force element method. The calculation results are compared with the results of experiments and meso-level random aggregate model analysis methods. The research results show that this series homogenization analysis method can be used to analyze the nonlinear damage analysis of recycled concrete materials. The compressive strength, stress-strain softening curve and crack propagation process of recycled concrete materials can be obtained using the present method.
| [1] | 肖建庄. 再生混凝土创新研究与进展[M]. 北京: 科学出版社, 2020. |
| [2] | 肖建庄, 杜江涛, 刘琼. 基于格构模型再生混凝土单轴受压数值模拟[J]. 建筑材料学报, 2009, 12(5): 511-514, 518. |
| [3] | 李文贵, 肖建庄, 袁俊强. 模型再生混凝土单轴受压应力分布特征[J]. 同济大学学报(自然科学版), 2012, 40(6): 906-913. |
| [4] | Peng, Y. and Liu, Y. (2019) Advances in the Base Force Element Method. Springer, Singapore.
https://doi.org/10.1007/978-981-13-5776-3 |
| [5] | 彭一江, 应黎坪. 再生混凝土细观分析方法[M]. 北京: 科学出版社, 2018. |
| [6] | Liu, C., Xing, L., Liu, H., Nong, X. and Xu, X. (2021) Experimental on Repair Performance and Complete Stress-Strain Curve of Self-Healing Recycled Concrete under Uniaxial Loading. Construction and Building Materials, 285, Article ID: 122900. https://doi.org/10.1016/j.conbuildmat.2021.122900 |
| [7] | Choubey, R.K., Kumar, S. and Chakradhara Rao, M. (2016) Modeling of Fracture Parameters for Crack Propagation in Recycled Ag-gregate Concrete. Construction and Building Materials, 106, 168-178.
https://doi.org/10.1016/j.conbuildmat.2015.12.101 |
| [8] | 谢永滨, 平乐, 李荣彬, 杨虹, 吴苗苗, 李丹丹, 罗冬梅. 再生混凝土单轴受压应力-应变全曲线分析[J]. 混凝土与水泥制品, 2018(2): 95-100. |
| [9] | Anuruddha, J., Adams, M.P. and Bandelt, M.J. (2018) Understanding Variability in Recycled Aggregate Concrete Mechanical Properties through Numerical Simulation and Statistical Evaluation. Construction and Building Materials, 178, 301-312. https://doi.org/10.1016/j.conbuildmat.2018.05.158 |
| [10] | Thomas, J., Nazeer Thaickavil, N. and Wilson, P.M. (2018) Strength and Durability of Concrete Containing Recycled Concrete Aggregates. Journal of Building Engineering, 19, 349-365. https://doi.org/10.1016/j.jobe.2018.05.007 |
| [11] | Tan, X., Li, W., Zhao, M. and Tam, V.W.Y. (2019) Numerical Discrete-Element Method Investigation on Failure Process of Recycled Aggregate Concrete. Journal of Materials in Civil Engineering, 31, Article ID: 04018353.
https://doi.org/10.1061/(ASCE)MT.1943-5533.0002562 |
| [12] | Guo, M., Grondin, F. and Loukili, A. (2019) Nu-merical Method to Model the Creep of Recycled Aggregate Concrete by Considering the Old Attached Mortar. Cement and Concrete Research, 118, 14-24.
https://doi.org/10.1016/j.cemconres.2019.01.008 |
| [13] | Kazemian, F., Rooholamini, H. and Hassani, A. (2019) Mechanical and Fracture Properties of Concrete Containing Treated and Untreated Recycled Concrete Aggregates. Construction and Building Materials, 209, 690-700.
https://doi.org/10.1016/j.conbuildmat.2019.03.179 |
| [14] | Alireza, M., Rahimzadeh, O.P. and Arul, A. (2021) Dis-crete Element Modeling of Cemented Recycled Concrete Aggregates under Unconfined and k0 Loading Conditions. Transportation Geotechnics, 26, Article ID: 100450.
https://doi.org/10.1016/j.trgeo.2020.100450 |
| [15] | 肖建庄. 再生混凝土单轴受压应力-应变全曲线试验研究[J]. 同济大学学报(自然科学版), 2007, 35(11): 1445-1449. |
