期刊
ENGINEERING GEOLOGY
卷 180, 期 -, 页码 85-98出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.enggeo.2014.07.017
关键词
Wenchuan earthquake; Seismic damage mechanism; Relative displacement; Mountain tunnel
资金
- National Natural Science Foundation of China [41102220, 51178398]
- Fundamental Research Funds for the Central Universities [SWJTUCX014]
- Development Plan for Ministry of Education Innovation team [IRT0955]
After the 2008 Wenchuan earthquake (Mw = 8.3), many mountain highway tunnels in the affected area were severely damaged. In order to improve the current knowledge about the seismic performance of mountain tunnels under strong earthquakes, a forensic investigation was conducted on 52 tunnels after the earthquake. Based on the seismic damage data, the damage level of the inspected tunnels was classified using a new damage evaluation criterion. Subsequently, typical seismic damage characteristics and mechanisms of mountain tunnels were analyzed based on three different damage patterns: damage to shallow tunnel, damage to deep-buried tunnel structure and damage to pavement. Finally, based on the relative displacement (RD) method, a three-dimensional numerical model was developed to investigate the deformation characteristics of the portal structure under a strong earthquake. The numerical results showed that the tunnel lining cross section exhibited an alternate tension-compression deformation at the diagonal directions, and the relative displacement value of the upper-structure (above the sidewall) was generally more than that of the lower-structure (under the sidewall). Three stress states of the lining were deduced from the numerical model, which provided a good interpretation for the seismic tunnel damages observed after the Wenchuan earthquake. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据