重庆大学学报2025，Vol.48Issue(8)：54-66,13.DOI:10.11835/j.issn.1000-582X.2024.275
基于内聚力模型的配筋钢纤维混凝土结构承载性能研究
Study on the bearing capacity performance of steel fiber reinforced concrete structures based on the cohesive zone model
摘要
Abstract
This study proposes a numerical modeling method based on the cohesive zone model to investigate the mechanical response and fracture mechanism of steel fiber reinforced concrete(SFRC)structures.In the proposed model,cohesive elements are used to stimulate potential fracture surfaces and rebar-concrete interfaces.A constitutive model for SFRC fracture surfaces is developed by considering mixed-mode damage evolution,interfacial friction,and the fiber bridging effect.Additionally,a modified bond-slip constitutive model for the rebar-concrete interface is proposed,accounting for normal separation.To validate the proposed model,a series of four-point bending experiments on SFRC specimens are conducted.The simulation results closely align with experimental observation,confirming the model's ability to accurately capture both mechanical response and fracture behavior.Parametric analysis reveals that inadequate fiber content or improper friction coefficients significantly reduce structural bearing capacity and ductility.关键词
钢纤维混凝土/内聚力模型/本构模型/损伤断裂/桥接效应/黏结滑移Key words
steel fiber reinforced concrete/cohesive zone model/constitutive model/fracture mechanics/fiber bridging effect/bond-slip relation分类
建筑与水利引用本文复制引用
孟栋栋,黄逸群,林本清..基于内聚力模型的配筋钢纤维混凝土结构承载性能研究[J].重庆大学学报,2025,48(8):54-66,13.基金项目
国家自然科学基金面上项目(52278158) （52278158）
福建省自然科学基金面上项目(2021J011062) （2021J011062）
福建省教育厅科技重点项目(2022G02025).Supported by General Program of National Natural Science Foundation of China(52278158),General Program of the Natural Science Foundation of Fujian Province(2021J011062),and Key Scientific and Technological Project of the Education Department of Fujian Province(2022G02025). （2022G02025）
