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Author:

Fan, L. F. (Fan, L. F..) (Scholars:范立峰) | Wang, L. J. (Wang, L. J..) | Wu, Z. J. (Wu, Z. J..)

Indexed by:

EI Scopus SCIE

Abstract:

Complex rock mass (wave impedances on two sides of the joint are different) commonly exists, which results in the propagation direction induced difference of transmission coefficient (PDIDTC). The PDIDTC is defined as the difference ratio of two transmission coefficients of waves in two opposite directions. The present paper further studied the displacement discontinuous method to investigate the PDIDTCs of particle velocity and stress in the complex rock mass. A modified SHPB test was conducted to validate the theoretical results. The effects of incident wave frequency and joint stiffness on the PDIDTC were discussed. Two cases of PDIDTC of blast wave, rectangular pulse and triangular pulse were illustrated. The results show that the PDIDTCs of particle velocity and stress are not influenced by the frequency, joint stiffness and waveform, but are influenced by the wave impedance ratio significantly. Moreover, obvious PDIDTC can be obtained when the wave propagates through complex rock mass, which cannot be ignored during rock dynamic analysis.

Keyword:

Wave impedance ratio Difference of transmission coefficient Wave propagation Propagation direction Complex rock mass

Author Community:

  • [ 1 ] [Fan, L. F.]Beijing Univ Technol, Coll Architecture & Civil Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, L. J.]Beijing Univ Technol, Coll Architecture & Civil Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 3 ] [Wu, Z. J.]Wuhan Univ, Sch Civil Engn, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China

Reprint Author's Address:

  • [Wu, Z. J.]Wuhan Univ, Sch Civil Engn, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China

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Source :

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES

ISSN: 1365-1609

Year: 2020

Volume: 135

7 . 2 0 0

JCR@2022

ESI Discipline: GEOSCIENCES;

ESI HC Threshold:99

Cited Count:

WoS CC Cited Count: 5

SCOPUS Cited Count: 6

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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