CLC number: TH161.12
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2017-02-07
Cited: 0
Clicked: 4819
Citations: Bibtex RefMan EndNote GB/T7714
Wei-teng Li, Ning Yang, Ting-chun Li, Yu-hua Zhang, Gang Wang. A new approach to simulate the supporting arch in a tunnel based on improvement of the beam element in FLAC3D[J]. Journal of Zhejiang University Science A, 2017, 18(3): 179-193.
@article{title="A new approach to simulate the supporting arch in a tunnel based on improvement of the beam element in FLAC3D",
author="Wei-teng Li, Ning Yang, Ting-chun Li, Yu-hua Zhang, Gang Wang",
journal="Journal of Zhejiang University Science A",
volume="18",
number="3",
pages="179-193",
year="2017",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1600508"
}
%0 Journal Article
%T A new approach to simulate the supporting arch in a tunnel based on improvement of the beam element in FLAC3D
%A Wei-teng Li
%A Ning Yang
%A Ting-chun Li
%A Yu-hua Zhang
%A Gang Wang
%J Journal of Zhejiang University SCIENCE A
%V 18
%N 3
%P 179-193
%@ 1673-565X
%D 2017
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1600508
TY - JOUR
T1 - A new approach to simulate the supporting arch in a tunnel based on improvement of the beam element in FLAC3D
A1 - Wei-teng Li
A1 - Ning Yang
A1 - Ting-chun Li
A1 - Yu-hua Zhang
A1 - Gang Wang
J0 - Journal of Zhejiang University Science A
VL - 18
IS - 3
SP - 179
EP - 193
%@ 1673-565X
Y1 - 2017
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1600508
Abstract: The beam element in FLAC3D can be used to simulate the supporting arch in a tunnel. However, this approach has the shortcoming of its constitutive model, and the bearing capacity and surrounding rock supporting effect of the arch model will be significantly exaggerated. To simulate the supporting arch in tunnel engineering well, a new approach is proposed by improving the beam element. The yield criterion of the beam element subjected to compression-bending loads is established based on the now-available bearing capacity formulas of some typical compression-bending sections. In addition, the yield criterion is embedded in the FLAC3D main program by using the FISH language, and the modification of the beam model and the yielding failure simulation of the supporting arch are finally implemented. Compression-bending tests and roadway tunnel arch support example analysis were performed. The results are as follows: (1) the modified model showed the dependence of the bending moment and axial force on the yielding action of the beam element under compression-bending loads; (2) the implementation program is effective and sensitive; (3) the computing deviation caused by the shortcomings of the original beam element model was effectively suppressed, the mechanical behavior and surrounding rock supporting laws exhibited by the arch model were much closer to reality, and the calculation accuracy and design reliability were improved by the new simulation approach.
This manuscript gives a modified model of the Beam structure element in the commercial code of FLAC3D. The modified model can consider the yield not only on the bending behavior but also on the axial deformation. The modification procedure of the axial yielding of the Beam structure element is described clearly, and the modified Beam has a good performance when it is subjected a compression-bending load. An example analysis of roadway arch support using the modified Beam is given. According to the results, the difference between the modified Beam with unmodified Beam is obvious.
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