194 0

Size effect in ultra-high-performance concrete beams

Title
Size effect in ultra-high-performance concrete beams
Author
류두열
Keywords
Ultra-high-performance concrete; Steel fibers; Flexural performance; Size effect; Fiber orientation and dispersion
Issue Date
2016-05
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ENGINEERING FRACTURE MECHANICS, v. 157, Page. 86-106
Abstract
In order to investigate the size effect on the flexural performance of ultra-high performance concrete (UHPC), numbers of UHPC beams with three different sizes, including two with smooth steel fibers with aspect ratios of 65 and 100 and one with twisted steel fibers with an aspect ratio of 100, were fabricated and tested. The beams made of UHPC matrix without fiber were also considered for evaluating the effect of fibers on the size effect. In addition, image analyses at crack surfaces were performed to investigate the size effect on the fiber distribution characteristics and their implication on the size dependent flexural performance. Test results indicated that the flexural performance of UHPC noticeably decreased with an increase in the specimen size, caused by a decrease in the number of fibers and poor fiber orientation. The use of longer steel fibers with a higher aspect ratio was effective in reducing the sensitivity to the size effect of UHPC beams compared with shorter steel fibers. Finally, by applying similar fiber distribution characteristics for all test specimens of different sizes, an insignificant size effect on the flexural strength was obtained for UHPC with 2% by volume of steel fibers. (C) 2016 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S001379441630011X?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/71586
ISSN
0013-7944; 1873-7315
DOI
10.1016/j.engfracmech.2016.02.009
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE