Evaluation of the parameters affecting the seismic response of underground cavities considering earthquakes in near and far fault fields

Document Type : Research Article

Authors

1 Department of civil engineering, Faculty of Engineering, Yazd University, Yazd, Iran

2 Civil Engineering Department, Faculty of Engineering, Yazd University, Yazd, Iran

3 Department of Civil Engineering, Faculty of Engineering, Ardakan University, Ardakan, Iran

Abstract

The existence of underground cavities such as aqueducts and water supply pipelines causes changes in the estimated seismic response on the ground. Since the characteristics of an earthquake are different near and far from the seismogenic source and the corresponding regulations have not considered near- and far-field effects on loading, it is necessary to study and compare such effects. This study has used the finite element method and the two-dimensional Plaxis software to investigate seismic responses on the ground while there are underground circular cavities. To this end, a set of near- and far-field accelerograms belonging to Bam, Landers and Loma Prieta were selected. Those recordings were different in terms of frequency. To examine the effect of soil type, four types with different mechanical characteristics were selected, and the seismic responses on the surface of the ground were studied in the presence and absence of an underground cavity. The effect of the buried depth of the cavity was evaluated with regard to two different buried depths (H/R = 1, 3). The results showed that the presence of an underground cavity leads to an amplified response of the ground. For instance, the amplification index of the displacement on the ground with and without cavities in the most critical conditions (Landers earthquake) was found to be 4.8 and 6 as recorded in near-field and far-field accelerograms, respectively. Moreover, the farther from the cavity center (X/R > 4), the less amplification was clearly observed on the ground under different loadings. The selected parameters also proved to have significant effects on the acceleration and displacement on the surface of the ground. To gain more insight about these effects, further research is needed.

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References

[1] M.R. Ghaem-maghamian , B. Khalili,  The effects of faulting parameters and site location on near-fault pulse characteristics, Journal of Faculty of Engineering (University of Tehran  42(4 (114)), (2008) 487-496.(in persion)
[2] D. E. Hudson, G. W. Housner, An analysis of strong-motion accelerometer data from the SanFrancisco earthquake of March 22, 1957, Bulletin of the seismological society of America, 48(3) (1958) 253-268.
[3] B. A. Bolt, The san fernando valley, california, earthquake of february 9 1971: Data on seismic hazards, Bulletin of the seismological society of America, 61(2) (1971).  501-510.
[4] V. V. Bertero, S. A. Mahin, R. A. Herrera, Aseismic design implications of near‐fault San Fernando earthquake records, Earthquake engineering & structural dynamics,  6(1) (1978) 31-42.
[5] V. W. Lee, M. D. Trifunac, Response of tunnels to incident SH-waves, Journal of the Engineering Mechanics Division, 105(4) (1979)  643-659.
[6] V. Lee, J. Karl, Diffraction of SV waves by underground, circular, cylindrical cavities, Soil Dynamics and Earthquake Engineering, 11(8) (1992) 445-456.
[7] J.-w. Liang, H. Zhang, V.W. Lee, A series solution for surface motion amplification due to underground group cavities: Incident P waves, Acta Seismoloica Sinica, 17(3) (2004)  296-307.
[8] J. Luco,  F. De Barros, Dynamic displacements and stresses in the vicinity of a cylindrical cavity embedded in a half‐space, Earthquake engineering & structural dynamics, 23(3) (1994)  321-340.
[9] P.Yiouta-Mitra, G. Kouretzis, G. Bouckovalas, A. Sofianos, Effect of underground structures in earthquake resistant design of surface structures, Dynamic response and soil properties, (2007) 1-10.
[10] J. Liang, J. Zhang, Z. Ba, The effect of underground cavities on design seismic ground motion, Proceedings of 15 world conference earthquake engineering, Lisbon, Paper ID, (2012).
[11] H. Alielahi, M. Adampira, Seismic effects of two-dimensional subsurface cavity on the ground motion by BEM: amplification patterns and engineering applications, International Journal of Civil Engineering, 14(4) (2016) 233-251.
[12] H. Alielahi, M. Adampira, Site-specific response spectra for seismic motions in half-plane with shallow cavities, Soil Dynamics and Earthquake Engineering, 80 (2016) 163-167.
[13] H. Alielahi, M. Adampira, M. Asgari, Seismic Response Assessment of the ground surface induced by twin tunnels subjected to incident in-plane shear waves, Tunneling and Underground Space Engineering, 35(1) (2016 (35-52.(in persion)
[14] N. Soltani, M. H. Bagheripour, Applied 2D equivalent linear program to analyze seismic ground motion: real case study and parametric investigations, Geomechanics and Engineering, 30(1) (2022) 1-10.‏
[15] N. Yeganeh, J. Bolouri-Bazaz, A. Akhtarpour, Seismic analysis of the soil-structure interaction for a high rise building adjacent to deep excavation, Soil Dynamics and Earthquake Engineering, 79 (2015) 149-170.
[16] R. P‌o‌u‌r-H‌o‌s‌s‌e‌i‌n‌i, N. Soltani, A Stud‌y of th‌e in‌t‌er‌a‌c‌t‌i‌o‌n of soi‌l-u‌n‌re‌i‌n‌f‌o‌r‌ced b‌as‌e‌m‌e‌n‌t wa‌lls‌, Sharing Journal of Civil Engineering, (2015) 79-86. (in persion)
[17] G. Abdollahzadeh, H. Faghihmaleki, H. Esmaili, Comparing hysteretic energy and inter-story drift in steel frames with V-shaped brace under near and far fault earthquakes, Alexandria Engineering Journal, 57(1) (2018) 301-308.
[18] N. Soltani, Seismic response evaluation of strip footing on geogrid-reinforced slope, Innovative Infrastructure Solutions, 6(4) (2021) 1-9.
[19] N. Soltani, M.H. Bagheripour, Seismic wave scatter study in valleys using coupled 2D finite element approach and absorbing boundaries, Scientia Iranica, 24(1) (2017) 110-120.
Amirkabir Journal of Civil Engineering
Volume 55, Issue 1
April 2023
Pages 61-84

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