Seismic fragility of shallowly buried bias loess tunnels based on vector-valued intensity measures

被引：0

作者：

Juncen L. ^{[1
,2
,3
]}

Weiyu S. ^{[2
]}

Guoyu L. ^{[1
,3
]}

Songhong Y. ^{[2
]}

Hao T. ^{[2
]}

机构：

[1] Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou

[2] School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou

[3] University of Chinese Academy of Sciences, Beijing

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2024年 / 54卷 / 02期

关键词：

bias tunnel; fragility surface; ground motion intensity measures (IMs); incremental dynamic analysis; seismic fragility;

D O I：

10.3969/j.issn.1001-0505.2024.02.021

中图分类号：

学科分类号：

摘要：

To quantitatively evaluate the seismic fragility of shallowly buried bias loess tunnels from a probabilistic perspective, a large number of nonlinear dynamic time calculations were performed on the finite element model of soil-structure interaction using wave methods based on viscoelastic boundaries and incremental dynamic analysis. Twenty ground motion intensity measures (IMs)were evaluated, and then fragility assessments based on scalar-valued IM and vector-valued IMs were subsequently conducted, respectively. The results show that the peak ground velocity (efficiency index ζ = 0. 15)is the most suitable IM, followed by the velocity spectral intensity (ζ = 0. 20)and the peak spectral velocity (ζ = 0. 22). Compared with the scalar-valued IM, the vector-valued IMs are better fitted and can reduce the dispersion of structural damage prediction. The effect of the correlation between two IMs needs to be considered to determine the effective range of the established seismic fragility surfaces. Using the scalar-valued IM underestimates or overestimates the actual damage probability of the tunnel. The seismic fragility of tunnels can be evaluated more accurately based on the vector-valued IMs. © 2024 Southeast University. All rights reserved.

引用

页码：432 / 440

页数：8

共 25 条

[1] Wang L M, Wu Z J, Xia K, Et al., Amplification of thickness and topography of loess deposit on seismic ground motion and its seismic design methods, Soil Dynamics and Earthquake Engineering, 126, (2019)
[2] Zhang Z G, Xu X Y, Zhao Q H., Simple theoretical analysis of rock pressure for shallow unsymmetrical-loading tunnels considering horizontal earthquake action [J], Rock and Soil Mechanics, 37, S2, (2016)
[3] Sun W Y, Yan S H, Ma Q G, Et al., Dynamic response characteristics and failure mode of a bias loess tunnel using a shaking table model test [J], Transportation Geotechnics, 31, (2021)
[4] Wang J H, Zhou X J, Liu J G, Et al., Numerical analysis of the dynamic response of a shallow-buried unsymmetrical-loading tunnel subjected to an oblique incidence of earthquake wave [J], Journal of Lanzhou University (Natural Sciences), 52, 4, (2016)
[5] Li L, He C, Geng P, Et al., Study of shaking table model test for seismic response of portal section of shallow unsymmetrical loading tunnel, Chinese Journal of Rock Mechanics and Engineering, 30, 12, pp. 2540-2548, (2011)
[6] Argyroudis S, Tsinidis G, Gatti F, Et al., Effects of SSI and lining corrosion on the seismic vulnerability of shallow circular tunnels[J], Soil Dynamics and Earthquake Engineering, 98, pp. 244-256, (2017)
[7] Chen Y S, Ding Z D, Zi H, Et al., Seismic vulnerability analysis of shield tunnels considering cavitation, Rock and Soil Mechanics, 42, 12, (2021)
[8] Huang Z K, Pitilakis K, Tsinidis G, Et al., Seismic vulnerability of circular tunnels in soft soil deposits:The case of Shanghai metropolitan system, Tunnelling and Underground Space Technology, 98, (2020)
[9] Jiang H, Gu Q, Huang L, Et al., Analysis on seismic vulnerability of offshore cable-stayed bridge considering time-dependent deterioration by chloride-induced corrosion[J], Journal of Southeast University (Natural Science Edition), 51, 1, (2021)
[10] Li N, Li Y, Li Z X., Seismic vulnerability analysis of reinforced concrete bridge piers based on vector-valued intensity measure[J], Engineering Mechanics, 33, 1, (2016)

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