{"title":"Fatigue-dependent pull-out degradation of inclined hooked-end steel fibers in SFRCC: Experiments and mechanics-based modeling","authors":"Mohamed Adel , Wang Li , Yan Xiao , Tamon Ueda","doi":"10.1016/j.cemconres.2025.107962","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the fatigue-induced degradation of fiber-bridging capacity in steel fiber-reinforced cementitious composites (SFRCC) under cyclic loading. Experimental and analytical investigations were employed to quantify interfacial degradation mechanisms. Hooked-end steel fibers embedded at 0°, 30°, 45°, and 60° inclinations within a concrete matrix were subjected to static and cyclic pull-out tests. Fibers were initially pulled out to simulate crack formation, followed by fatigue loading up to two million cycles or failure. Two failure mechanisms were observed: fiber pull-out and rupture, further validated through X-ray CT scans. Fiber rupture dominated at higher inclination angles, with significant surface matrix spalling. Fibers at 45° exhibited the highest degradation rate, with accelerated displacement evolution and shortened fatigue life. Mechanics-based models were developed to predict displacement evolution, fatigue life, and rupture behavior, demonstrating strong alignment with experimental results. The findings enhanced understanding of fatigue damage evolution in SFRCC and provide reliable frameworks for performance prediction.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"197 ","pages":"Article 107962"},"PeriodicalIF":13.1000,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cement and Concrete Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0008884625001814","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
This study investigates the fatigue-induced degradation of fiber-bridging capacity in steel fiber-reinforced cementitious composites (SFRCC) under cyclic loading. Experimental and analytical investigations were employed to quantify interfacial degradation mechanisms. Hooked-end steel fibers embedded at 0°, 30°, 45°, and 60° inclinations within a concrete matrix were subjected to static and cyclic pull-out tests. Fibers were initially pulled out to simulate crack formation, followed by fatigue loading up to two million cycles or failure. Two failure mechanisms were observed: fiber pull-out and rupture, further validated through X-ray CT scans. Fiber rupture dominated at higher inclination angles, with significant surface matrix spalling. Fibers at 45° exhibited the highest degradation rate, with accelerated displacement evolution and shortened fatigue life. Mechanics-based models were developed to predict displacement evolution, fatigue life, and rupture behavior, demonstrating strong alignment with experimental results. The findings enhanced understanding of fatigue damage evolution in SFRCC and provide reliable frameworks for performance prediction.
期刊介绍:
Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.