Experimental and Numerical Study of Bonding Capacity of Interface between Ultra-High Performance Concrete and Steel Tube  

作　　者：Ruikun Xu Jiu Li Wenjie Li Wei Zhang 

机构地区：[1]China Communications Third Highway Engineering Bureau Co.,Ltd.,Fuzhou,350300,China [2]College of Civil Engineering,Fujian University of Technology,Fuzhou,350118,China

出　　处：《Structural Durability & Health Monitoring》2025年第2期285-305,共21页结构耐久性与健康监测(英文)

基　　金：supported by grants from the Natural Science Foundation of Fujian Province(2021J011062);Minjiang Scholars Funding(GY-633Z21067).

摘　　要：This study investigates the bond performance at the interfacial region shared by Ultra-High Performance Concrete(UHPC)and steel tubes through push-out tests.This study examines how changes in steel fiber volumetric ratio and thickness of steel tube influence the bond strength characteristics.The results show that as the enhancement of the steel tube wall thickness,the ultimate bond strength at the interface improves significantly,whereas the initial bond strength exhibits only slight variations.The influence of steel fiber volumetric ratio presents a nonlinear trend,with initial bond strength decreasing at low fiber content and increasing significantly as fiber content rises.Additionally,finite element(FE)simulations were applied to replicate the experimental conditions,and the outcomes showed strong correlation with the experimental data,confirming the exactitude of the FE model in predicting the bond behavior at the UHPC-Steel interface.These findings provide valuable insights for optimizing the design of UHPC-Filled steel tubes in high-performance structure.

关 键 词：Ultra-high performance concrete filled steel tube(UHPCFST) push-out test bonding capacity cohesive zone model 

分 类 号：TG1[金属学及工艺—金属学]