Longitudinal Seismic Response of Metro Tunnels Crossing a Fault with Multi-Slip Surfaces
There are multiple seismic fault zones near Xi’an in China, among which the Li Piedmont Fault has multiple slip surfaces. A 3D finite element dynamic Soil–Fault–Tunnel model was established based on the engineering background of the Xi’an Metro tunnel orthogonally crossing the Li Piedmont Fault. The...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-01-01
|
| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/14/1/207 |
| _version_ | 1797340046613807104 |
|---|---|
| author | Qiyao Wang Yawu Yang Hongquan Teng Yifei He |
| author_facet | Qiyao Wang Yawu Yang Hongquan Teng Yifei He |
| author_sort | Qiyao Wang |
| collection | DOAJ |
| description | There are multiple seismic fault zones near Xi’an in China, among which the Li Piedmont Fault has multiple slip surfaces. A 3D finite element dynamic Soil–Fault–Tunnel model was established based on the engineering background of the Xi’an Metro tunnel orthogonally crossing the Li Piedmont Fault. The input seismic loads used the Chi-Chi, El-Centro, and artificial seismic waves, and the latter was artificially synthesized based on seismic conditions and site conditions of actual engineering. The Chi-Chi seismic wave with larger PGV/PGA and wider acceleration-sensitive area is a near-field seismic wave, while the others are far-field seismic waves. The seismic loads were transformed into the equivalent nodal force on the boundary nodes of the model, and nonlinear dynamic calculation was carried out to obtain the longitudinal seismic response of the structure. The main results show that the fault amplifies the seismic response of the tunnel, and the tunnel at the position of the fault slip surfaces is more vulnerable to failure, especially near the slip surface between the hanging wall and the fault, where the maximum acceleration, soil pressure, and internal force of the tunnel structure occur. In addition, the seismic response of the tunnel and soil caused by near-field seismic motion is significantly stronger than that caused by far-field seismic motion. |
| first_indexed | 2024-03-08T09:56:14Z |
| format | Article |
| id | doaj.art-d8e858eedd6c44698cb7b95a6aa529ab |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-08T09:56:14Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-d8e858eedd6c44698cb7b95a6aa529ab2024-01-29T13:49:14ZengMDPI AGBuildings2075-53092024-01-0114120710.3390/buildings14010207Longitudinal Seismic Response of Metro Tunnels Crossing a Fault with Multi-Slip SurfacesQiyao Wang0Yawu Yang1Hongquan Teng2Yifei He3School of Civil Engineering and Architecture, Chang’an University, Xi’an 710061, ChinaSchool of Civil Engineering and Architecture, Chang’an University, Xi’an 710061, ChinaShaanxi Hydraulic Environment Geological Survey Center, Xi’an 710068, ChinaSchool of Civil Engineering and Architecture, Chang’an University, Xi’an 710061, ChinaThere are multiple seismic fault zones near Xi’an in China, among which the Li Piedmont Fault has multiple slip surfaces. A 3D finite element dynamic Soil–Fault–Tunnel model was established based on the engineering background of the Xi’an Metro tunnel orthogonally crossing the Li Piedmont Fault. The input seismic loads used the Chi-Chi, El-Centro, and artificial seismic waves, and the latter was artificially synthesized based on seismic conditions and site conditions of actual engineering. The Chi-Chi seismic wave with larger PGV/PGA and wider acceleration-sensitive area is a near-field seismic wave, while the others are far-field seismic waves. The seismic loads were transformed into the equivalent nodal force on the boundary nodes of the model, and nonlinear dynamic calculation was carried out to obtain the longitudinal seismic response of the structure. The main results show that the fault amplifies the seismic response of the tunnel, and the tunnel at the position of the fault slip surfaces is more vulnerable to failure, especially near the slip surface between the hanging wall and the fault, where the maximum acceleration, soil pressure, and internal force of the tunnel structure occur. In addition, the seismic response of the tunnel and soil caused by near-field seismic motion is significantly stronger than that caused by far-field seismic motion.https://www.mdpi.com/2075-5309/14/1/207the Piedmont fault of Li Mountainmetro tunnellongitudinal seismic responsenear-field seismic motion |
| spellingShingle | Qiyao Wang Yawu Yang Hongquan Teng Yifei He Longitudinal Seismic Response of Metro Tunnels Crossing a Fault with Multi-Slip Surfaces Buildings the Piedmont fault of Li Mountain metro tunnel longitudinal seismic response near-field seismic motion |
| title | Longitudinal Seismic Response of Metro Tunnels Crossing a Fault with Multi-Slip Surfaces |
| title_full | Longitudinal Seismic Response of Metro Tunnels Crossing a Fault with Multi-Slip Surfaces |
| title_fullStr | Longitudinal Seismic Response of Metro Tunnels Crossing a Fault with Multi-Slip Surfaces |
| title_full_unstemmed | Longitudinal Seismic Response of Metro Tunnels Crossing a Fault with Multi-Slip Surfaces |
| title_short | Longitudinal Seismic Response of Metro Tunnels Crossing a Fault with Multi-Slip Surfaces |
| title_sort | longitudinal seismic response of metro tunnels crossing a fault with multi slip surfaces |
| topic | the Piedmont fault of Li Mountain metro tunnel longitudinal seismic response near-field seismic motion |
| url | https://www.mdpi.com/2075-5309/14/1/207 |
| work_keys_str_mv | AT qiyaowang longitudinalseismicresponseofmetrotunnelscrossingafaultwithmultislipsurfaces AT yawuyang longitudinalseismicresponseofmetrotunnelscrossingafaultwithmultislipsurfaces AT hongquanteng longitudinalseismicresponseofmetrotunnelscrossingafaultwithmultislipsurfaces AT yifeihe longitudinalseismicresponseofmetrotunnelscrossingafaultwithmultislipsurfaces |