Seismic damage of mountain tunnels during the 5.12 Wenchuan earthquake

2016 ◽  
Vol 13 (11) ◽  
pp. 1958-1972 ◽  
Author(s):  
Hai-tao Yu ◽  
Jun-tao Chen ◽  
Yong Yuan ◽  
Xu Zhao
Keyword(s):  
Wenchuan Earthquake ◽  
Seismic Damage ◽  
Mountain Tunnels ◽  
5.12 Wenchuan Earthquake

Investigation and Analysis on Seismic Damages of Mountain Tunnels Subjected to Wenchuan Earthquake

2011 ◽  
Vol 99-100 ◽  
pp. 273-281 ◽  
Author(s):  
Shang Jiang Tao ◽  
Bo Gao ◽  
Yu Min Wen ◽  
Xiang Zhou
Keyword(s):  
Wenchuan Earthquake ◽  
Ground Level ◽  
Seismic Damage ◽  
Underground Structures ◽  
The Public ◽  
Severe Intensity ◽  
Mountain Tunnels ◽  
Basic Characteristics ◽  
Earthquake Damages ◽  
Resistance Performance

Wenchuan earthquake of May 12 struck China with amazement in 2008, which inflicted the devastating destruction to the public transport infrastructures in Sichuan province. Generally speaking, underground structures have the stronger seismic resistance performance compared to ground-level structures. However, seismic disasters of mountain tunnels were fairly conspicuous after the earthquake. Based on the references about tunnel earthquake damages at home and abroad (Dowding and Rozen, 1978; Huo, 2005; Rozen, 1976; Youssef, 2001; wang, 2001), more attentions should be paid to the prevention and mitigation of tunnel seismic hazards under severe intensity earthquakes. This paper describes some typical earthquake damages to mountain tunnels during Wenchuan earthquake and presents the basic characteristics of the tunnel seismic damage as well. Meanwhile, the possible reasons for the seismic damage and the corresponding measures for relieving or resisting the damage are also given.

scholarly journals Rapid Assessment and Classification for Seismic Damage of Mountain Tunnel Based on Concentric Circle Method

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Hua Xu ◽  
Jingsong Xu ◽  
Runfang Sun ◽  
Hefu Pu ◽  
Yin Cheng
Keyword(s):  
Wenchuan Earthquake ◽  
Rapid Assessment ◽  
Damage Index ◽  
Circle Method ◽  
Seismic Damage ◽  
Concentric Circle ◽  
Assessment System ◽  
New Method ◽  
Mountain Tunnels ◽  
Mountain Tunnel

Concentric circle method (CCM), a new method based on analytic hierarchy process (AHP) and numerical discretization of 40 mountain tunnels damaged by Wenchuan earthquake in China, is proposed to rapidly assess the seismic damage level (SDL) of mountain tunnels. The new method consists of four components. First, according to the type and degree of seismic damage of tunnel, the whole tunnel is divided into a number of successive sections. Second, four factors (i.e., slope and portal damage, lining damage, pavement damage, and earthquake collapse) are selected as the main controlling factor set, and then multilevel factor sets are proposed to establish the assessment system. Third, the discretized assessment indexes and classification criteria are established for the rapid assessment of SDL of mountain tunnel. Finally, based on the comprehensive analysis on the SDL of each section, the SDL of the whole tunnel is calculated in terms of the seismic damage index and synthetic radius. With the assessment results shown on a straightforward concentric circle diagram, the proposed CCM method can rapidly and reliably assess the SDL of mountain tunnel to win over precious time for emergency rescue and provide references for the repair of damaged tunnel. In addition, the accuracy and applicability of the proposed method is verified by using a case study of Longxi tunnel located at the epicenter of the Wenchuan earthquake in China.

Research on the Dynamic Responses of Shallow-Buried Depth Tunnel under the Action of Rayleigh Waves

2011 ◽  
Vol 368-373 ◽  
pp. 2852-2858
Author(s):  
Hua Xu ◽  
Tian Bin Li ◽  
Chang Wei Yang
Keyword(s):  
Numerical Model ◽  
Wenchuan Earthquake ◽  
Mechanism Of Action ◽  
Rayleigh Waves ◽  
Tunnel Lining ◽  
Dynamic Responses ◽  
Severe Damage ◽  
Multiplicative Effect ◽  
Mountain Tunnels ◽  
5.12 Wenchuan Earthquake

It has been proved by the seismologic observation of 5.12 Wenchuan Earthquake that a large number of shallow-buried depth mountain tunnels at the portal are underwent severe damage. Earthquake waves, especially Rayleigh waves may be a major factor causing the damage. The numerical model of the shallow-buried depth mountain tunnels by FLAC3D is establishes in this paper, and the dynamic responses of the shallow-buried depth mountain tunnels under the action of Rayleigh waves are simulated by loading on normal Rayleigh waves. The effect of different strength of surface waves is simulated by the in-site blasting tests. The dynamic responses of the tunnel lining under the action of Rayleigh waves are obtained by filtering and composition separation in order to discuss the incidence and mechanism of action. The results show that the dynamic responses of tunnel lining under the action of Rayleigh waves mainly focuses on the portal of tunnel, namely the buried depth and lengthways depth of the tunnel are 0~16m and 0~20m, the tunnel lining is damaged easily in the incidence, and the multiplicative effect of Rayleigh waves often occurs at the portal; beyond the incidence, Rayleigh waves attenuate rapidly and the dynamic responses of the tunnel lining decreases gradually, which has little effects on the safety of tunnel structures.

Research on Material Properties of Engineering Materials with Construct Disaster Preparedness of the Four-Dimensional Space in Hilly Cities’ Communities

2014 ◽  
Vol 978 ◽  
pp. 23-26
Author(s):  
Si Ru Qian
Keyword(s):  
Wenchuan Earthquake ◽  
Urban Area ◽  
Material Properties ◽  
Disaster Preparedness ◽  
Dimensional Space ◽  
Materials Research ◽  
5.12 Wenchuan Earthquake ◽  
Engineering Materials ◽  
The University ◽  
Geographical Feature

We take “5.12 Wenchuan earthquake” influence and one of the university in Mianyang urban area as the typical examples of the disaster preparedness community. We discuss how to plan the multiply disaster preparedness which in accordance to the geographical feature of hilly cities through the material properties of engineering materials research and study of the four-dimensional space disaster preparedness model.

Analysis of the Building Damage and its Coping Strategies

2012 ◽  
Vol 174-177 ◽  
pp. 2155-2159
Author(s):  
Lin Hong ◽  
Bin Xia Xue
Keyword(s):  
Stress Distribution ◽  
Coping Strategies ◽  
Wenchuan Earthquake ◽  
Seismic Design ◽  
Building Damage ◽  
Masonry Building ◽  
Building Frame ◽  
5.12 Wenchuan Earthquake

This paper examines the damage of buildings with different structures in 5.12 Wenchuan Earthquake to summarize the features of stress distribution and aseismatic performance and then presents the problems of the masonry building, frame and part of the frame structural buildings in the earthquake. The purpose is to put forward the series of technical strategies of anti-seismic design, which include the overall optimization, stiffness deployment and node strengthening economically and scientifically.

Earth-Rock Dam’s Seismic Vulnerability Analysis of Mianyang City in the Wenchuan Ms8.0 Earthquake

2012 ◽  
Vol 166-169 ◽  
pp. 2151-2158
Author(s):  
Hai An Liang ◽  
Li Ping Jing ◽  
Yong Qiang Li ◽  
Chun Hui Liu
Keyword(s):  
Wenchuan Earthquake ◽  
Delphi Method ◽  
Seismic Vulnerability ◽  
Beta Function ◽  
Seismic Damage ◽  
Vulnerability Analysis ◽  
The Wenchuan Earthquake ◽  
Seismic Vulnerability Analysis

Dam damaged is one of common forms about lifeline engineering after earthquake raids. Based on the analysis of the seismic damaged conditions of 825 dams in Mianyang City, this paper establishes a dam’s seismic vulnerability matrix that suite for the Chinese specification. Compares the Mianyang city’s earth-rock dam seismic vulnerability matrix with the ATC-13’s that based on Delphi method, the vulnerability of dams in the Wenchuan earthquake is quite different with ATC-13’s, earth-rock dams of Mianyang City appear to be more vulnerable during earthquake. Base on date of seismic vulnerability matrix in Mianyang city, vulnerability curves are established. The vulnerability curves that fitted by beta function can be used to predict Chinese earth-rock dam’ seismic damage.

Strong Motion Simulation of the Weihe Basin in Wenchuan Earthquake

2014 ◽  
Vol 501-504 ◽  
pp. 1460-1463
Author(s):  
Qi Fang Liu
Keyword(s):  
Wenchuan Earthquake ◽  
Spectral Element Method ◽  
Numerical Technique ◽  
Strong Motion ◽  
Spectral Element ◽  
Motion Simulation ◽  
Computing Technique ◽  
5.12 Wenchuan Earthquake ◽  
Weihe Basin ◽  
Strong Motion Simulation

Seismic response of the Weihe basin generated by 5.12 Wenchuan earthquake is simulated by using the spectral-element method and parallel computing technique, considering 3D basin model incorporated with real topography. The wave propagation and the comparison of the synthetic and observed records are studied in detail in this paper. The result shows that appropriate source and detailed basin model and accurate numerical technique can simulate the wavefield and large basin ground motion well.

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