华侨大学学报（自然科学版）2025，Vol.46Issue(4)：400-409,10.DOI:10.11830/ISSN.1000-5013.202501009
NC-UHPC界面抗剪性能试验及基于内聚力模型的仿真分析
NC-UHPC Interface Shear Performance Test and Simulation Based on Cohesive Zone Model
摘要
Abstract
To investigate the shear mechanism at the interface between ultra-high performance concrete(UHPC)and normal concrete(NC),nine groups of double-sided shear tests were conducted on NC-UHPC specimens,the effects of steel fiber content,concrete age,and boundary constraint conditions on interfacial mechanical properties were studied.Combining with ABAQUS software,a refined finite element model consid-ering interfacial bond-slip characteristics was established,and an interfacial bond stress distribution model was constructed through theoretical derivation.The results show that under unrestrained conditions,specimens with low steel fiber content(0％-1％volume fraction)exhibit single-surface failure characteristics,while fixing the bottom of the NC blocks effectively activates a dual-surface failure mode.The steel fiber content in UHPC positively correlates with the interfacial shear strength,while the interfacial stiffness is less affected by the steel fiber content.The increase of UHPC age enhances interfacial stiffness,while higher NC age has the inhibitory effect.The proposed finite element model effectively simulates the damage evolution at the interface,but simulates the asymmetric strain field in double-shear specimens with limitations.Based on the principle of energy conservation,the two-parameter model of interfacial load-displacement is established,and its prediction results conforms well with the test data.关键词
NC-UHPC界面/单推试验/数字图像相关/有限元/内聚力模型Key words
NC-UHPC interface/pushout test/digital image correlation/finite element/cohesive zone model分类
交通工程引用本文复制引用
黄维,王婷,张雨婷,斯比努尔·下木希奴,周知..NC-UHPC界面抗剪性能试验及基于内聚力模型的仿真分析[J].华侨大学学报（自然科学版）,2025,46(4):400-409,10.基金项目
湖北省青年科技人才联合项目(2023DJC001) （2023DJC001）
国家级大学生创新创业训练计划项目(S202310497204) （S202310497204）
