Study on Dynamic Response Characteristics and Damage Mechanism of Tunnel Lining at Entrance of Shallow Bias Tunnel
Open Access
- 24 September 2021
- journal article
- research article
- Published by Hindawi Limited in Shock and Vibration
- Vol. 2021, 1-15
- https://doi.org/10.1155/2021/8930560
Abstract
The structural damage of the lining structure at the entrance of a tunnel is the most common instability problem. The instability problem may cause dynamic effects such as earthquakes and blasting. Based on the seismic damage data collected from previous major earthquakes at the entrance of shallow-buried tunnel, the shaking table test and numerical simulation are used to analyze dynamic response characteristics and damage evolution characteristics of the tunnel in the shallow-buried hole at 30°. The study revealed the stress characteristics of tunnel lining and the mechanism of structural damage under earthquake excitation. The research results show that the biased tunnel (30°) is susceptible to damage on the unsymmetrical loading side, the biased ground surface leads to acceleration, and high speed also significantly increases the effect. The biased side leg of the tunnel lining cross section is a location with a large internal force distribution. The biased tunnel has a relatively unfavorable internal force value distribution and a larger peak, and the peak at the larger bias side has the largest peak value. The skewback and spandrel portion of the biased tunnel lining load are more likely to be damaged.Keywords
Funding Information
- National Natural Science Foundation of China (51708373)
This publication has 21 references indexed in Scilit:
- Damage to mountain tunnels related to the Wenchuan earthquake and some suggestions for aseismic tunnel constructionBulletin of Engineering Geology and the Environment, 2011
- Analysis of Seismic Response of Shallow Large Section Multi-arch TunnelProcedia Engineering, 2011
- Assessment of the dynamic stability of the portals of the Dorukhan tunnel using numerical analysisInternational Journal of Rock Mechanics and Mining Sciences, 2010
- Case study on seismic tunnel responseCanadian Geotechnical Journal, 2008
- Seismic capacity assessment of old Sanyi railway tunnelsTunnelling and Underground Space Technology, 2007
- Shaking table testing of geofoam seismic buffersSoil Dynamics and Earthquake Engineering, 2007
- Ovaling deformations of circular tunnels under seismic loading, an update on seismic design and analysis of underground structuresTunnelling and Underground Space Technology, 2005
- Seismic design and analysis of underground structuresTunnelling and Underground Space Technology, 2001
- Assessment of damage in mountain tunnels due to the Taiwan Chi-Chi EarthquakeTunnelling and Underground Space Technology, 2001
- A plastic-damage model for concreteInternational Journal of Solids and Structures, 1989