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Indexed by:期刊论文

Date of Publication:2022-06-30

Journal:人民长江

Affiliation of Author(s):建设工程学部

Issue:5

Page Number:73-77

ISSN No.:1001-4179

Abstract:The number of the elements in the meso-level numerical simulation of concrete is too many and the calculation effi-ciency is low, so the concept of the interface laminar element is proposed. Based on the auto-fine adjustment algorithm of micro-step iteration of overlapping aggregate, a meso-level concrete numerical model is generated by the random aggregate model collocated by the random concave-convex aggregate. By analyzing the combination of the main influential factors, the interface laminar element is established. Meanwhile, the influence of the proportions of different components as well as the width of inter-face laminar on the mechanical features of the interface laminar element is analyzed;and furthermore, the impacts of the interface laminar element on the macro-level strength of concrete specimen are studied. A numerical example is given to verify the ration-ality of the model. The results show that the proposed element can simulate the effects of interface laminar region on the mechani-cal behavior of concrete specimen and reveal the influential laws of strength variation of the interface laminar region on the con-crete specimen.

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