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Author:

Jiao, Yubo (Jiao, Yubo.) | Fang, Menghan (Fang, Menghan.) | Han, Xiao (Han, Xiao.) | Yang, Hua (Yang, Hua.)

Indexed by:

EI Scopus SCIE

Abstract:

An ecological ultra-high-performance glass sand concrete (UHPGC) was prepared by partially replacing quartz sand in traditional ultra-high-performance concrete (UHPC) with glass sand recycled from waste glass. The four-point bending tests of UHPGC notched beams with different notch-depth ratios (0.2, 0.3, 0.4, and 0.5) were carried out, while acoustic emission (AE) monitoring was employed at the whole fracture process. Flexural toughness and residual flexural tensile strength were used to evaluate the flexural properties. Meanwhile, fracture energy and fracture toughness were used to evaluate the fracture properties. The results reveal that notchdepth ratio exhibits a significant effect on the flexural and fracture performances of UHPGC notched beams. The residual flexural tensile strength, flexural toughness, fracture energy and fracture toughness decrease with the increase of notch depth. Moreover, AE energy parameters can favorably characterize the differences of energy release in the fracture processes of UHPGC beams with different notch depths, and favorable correlations are observed between cumulative AE energy and fracture energy. Besides, AE wavelet entropy are constructed based on wavelet packet transform (WPT) of AE waveforms, and the evolution model of wavelet entropy is established. By comparing with the evolution process of AE energy information entropy, it is proved that the maximum point of wavelet entropy can be used as the key point to predict the peak load.

Keyword:

UHPGC Flexural and fracture characteristics Acoustic emission Notch -depth ratio Wavelet entropy

Author Community:

  • [ 1 ] [Jiao, Yubo]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, State Key Lab Bridge Engn Safety & Resilience, Minist Educ, Beijing, Peoples R China
  • [ 2 ] [Fang, Menghan]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, State Key Lab Bridge Engn Safety & Resilience, Minist Educ, Beijing, Peoples R China
  • [ 3 ] [Yang, Hua]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, State Key Lab Bridge Engn Safety & Resilience, Minist Educ, Beijing, Peoples R China
  • [ 4 ] [Han, Xiao]CCCC Highway Bridges Natl Engn Res Ctr CO Ltd, Beijing, Peoples R China

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Source :

ENGINEERING FRACTURE MECHANICS

ISSN: 0013-7944

Year: 2023

Volume: 290

5 . 4 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:19

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 11

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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