东南大学学报（自然科学版）2025，Vol.55Issue(1)：89-97,9.DOI:10.3969/j.issn.1001-0505.2025.01.010
基于损伤比强度理论的约束钢纤维混凝土塑性-损伤模型及应用
Plastic-damage model and application of confined steel fiber reinforced concrete based on damage ratio strength theory
摘要
Abstract
To establish a triaxial plastic-damage model(CDP)for steel fiber reinforced concrete(SFRC),the construction method of a triaxial plastic-damage model for ordinary concrete was employed.Extensive analy-sis was conducted on the existing database of uniaxial mechanical property tests for SFRC.The unified calcula-tion formulas were proposed for the cubic compressive strength,the axial compressive strength,the axial ten-sile strength,the elastic modulus,the peak compressive strain,and the peak tensile strain under various steel fiber volume fractions.The skeleton curves for the uniaxial compression and tension stress-strain and the ex-pressions of the unloading stiffness of SFRC were derived.According to on the damage ratio strength theory of SFRC,the triaxial strength and other parameters in the plasticity-damage model were recommended,and a confined SFRC triaxial plasticity-damage model was established.The results show that in the finite element analysis of statically loaded simply supported beams reinforced with steel fibers and steel bars,steel tube SFRC axial compression short columns,and low-cycle repeated loading of steel tube SFRC cantilever col-umns,the calculated results obtained by the proposed model are in good agreement with the experimental re-sults.关键词
钢纤维混凝土/力学性能/塑性-损伤模型/有限元分析Key words
steel fiber reinforced concrete/mechanical properties/plastic-damage model/finite element analysis分类
建筑与水利引用本文复制引用
丁发兴,邓亦南,吴霞..基于损伤比强度理论的约束钢纤维混凝土塑性-损伤模型及应用[J].东南大学学报（自然科学版）,2025,55(1):89-97,9.基金项目
国家自然科学基金面上资助项目(51978664). （51978664）
