eprintid: 10188852
rev_number: 9
eprint_status: archive
userid: 699
dir: disk0/10/18/88/52
datestamp: 2024-03-12 08:05:17
lastmod: 2024-03-12 08:05:17
status_changed: 2024-03-12 08:05:17
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Xu, Q
creators_name: Zhu, Y
creators_name: Sebastian, W
creators_name: Wang, J
title: Effect of Steel-Fiber Shear Reinforcement on Postcracking Shear Fatigue Behavior of Nonstirrup UHPC Beams
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F44
keywords: Science & Technology, Technology, Construction & Building Technology, Engineering, Civil, Engineering, Postcracking shear fatigue, Ultra-high performance concrete (UHPC) beam, Steel fiber, Nonstirrups, Damage evolution, CONCRETE BEAMS, PERFORMANCE, MODEL, MEMBERS
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: Steel fibers in ultra-high performance concrete (UHPC) have been demonstrated to improve resistance to crack growth, decrease deflection, and increase fatigue life under cyclic loads. Using steel fibers as shear reinforcements, this paper investigates its effect on the postcracking shear fatigue behavior of nonstirrup UHPC beams. The study involved five UHPC beams comprising two static and three fatigue specimens to test the effects of the upper fatigue load, steel-fiber ratio, and stirrup ratio on the shear fatigue response. The test results showed that increasing the initial crack width in the nonstirrup UHPC beam from 0.05 to 0.2 mm (the equivalent of doubling the upper fatigue load) decreased the fatigue life from over two million to 24,875 cycles. The use of steel fibers in place of stirrups increased the residual-to-static strength and residual-to-initial stiffness ratios by 5% and 16%, respectively, after two million cycles. Compared with the specimen with stirrups, the steel-fiber-reinforced specimen had a lower midspan fatigue deflection-to-ultimate static deflection ratio owing to the relieved fatigue strain localization and increased tensile steel reinforcement-UHPC bond fatigue strength. The current codes predict the shear fatigue strength conservatively. A calculation model for accurately predicting fatigue deflection was proposed and compared with the existing test results. A future study on the wider parametric analysis and large-scale beam tests on the fatigue performance of these beams should be conducted.
date: 2024-04-01
date_type: published
publisher: American Society of Civil Engineers
official_url: http://dx.doi.org/10.1061/jsendh.steng-12112
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2215397
doi: 10.1061/JSENDH.STENG-12112
lyricists_name: Sebastian, Wendel
lyricists_id: WSEBA57
actors_name: Sebastian, Wendel
actors_id: WSEBA57
actors_role: owner
funding_acknowledgements: 52308175 [National Natural Science Foundation]; U1943205 [National Natural Science Foundation]; JSTJ-2023-JS002 [Jiangsu Province Youth Science and Technology Talent Lifting Project]
full_text_status: public
publication: Journal of Structural Engineering
volume: 150
number: 4
article_number: 04024014
pages: 15
issn: 0733-9445
citation:        Xu, Q;    Zhu, Y;    Sebastian, W;    Wang, J;      (2024)    Effect of Steel-Fiber Shear Reinforcement on Postcracking Shear Fatigue Behavior of Nonstirrup UHPC Beams.                   Journal of Structural Engineering , 150  (4)    , Article 04024014.  10.1061/JSENDH.STENG-12112 <https://doi.org/10.1061/JSENDH.STENG-12112>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10188852/1/Sebastian_Manuscript%20%284%29.pdf