基于分段步进式弹塑性格构模型的混凝土破坏过程细观模拟

doi:10.11896/cldb.21100198

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Abstract The classically lattice model assumes the local elements behave elastic brittle, neglecting the ductility of the mortar matrix. This leads to the simulated load-displacement response more brittle than the realistic. To solve the aforementioned issue, a piece-wise approach was introduced to describe the elastic-plastic constitutive relation of lattice element. The fracture process and the load-displacement response were obtained through the sequentially-linear solution approach. The model was calibrated using the uniaxial tension and compression tests. It is found that the model can precisely simulate the fracture process and load-displacement response. Moreover, the model was used to model the size effect in uniaxial tension and the influence of the specimen’s slenderness and boundary confinement on the fracture behavior under compression. It offers a new theoretical method and approach for studying the fracture of concrete.

Key words： concrete meso-scale lattice model fracture process elastic-plastic constitutive relation

Published: 25 April 2023 Online: 2023-04-24

CLC number:

TU528

Fund:Taishan Scholar Foundation of Shandong Province (tsqn201909032), National Natural Science Foundation of China (52008234,51978387) and Natural Science Foundation of Jiangsu Province (BK20200235).

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	Articles by authors
	ZHANG Hongzhi
	JIN Zuquan
	JIANG Nengdong
	GE Zhi
	Erik Schlangen
	LING Yifeng
	Branko Šavija
	WANG Zheng

Cite this article:

ZHANG Hongzhi,JIN Zuquan,JIANG Nengdong, et al. Fracture Modelling of Concrete at Meso-scale Using Piece-wise Based Elastic-Plastic Lattice Model[J]. Materials Reports, 2023, 37(8): 21100198-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21100198 OR http://www.mater-rep.com/EN/Y2023/V37/I8/21100198

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