Seismic Dynamic Response and Lining Damage Analysis of Curved Tunnel under Shallowly Buried Rock Strata

Shijie Bu, Xiaojiu Feng, Luyan Yao, Fujian Yang, Yongtian Xie and Shaofeng Liu ()
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Shijie Bu: College of Urban Construction, Changzhou University, Changzhou 213164, China
Xiaojiu Feng: College of Urban Construction, Changzhou University, Changzhou 213164, China
Luyan Yao: College of Urban Construction, Changzhou University, Changzhou 213164, China
Fujian Yang: College of Urban Construction, Changzhou University, Changzhou 213164, China
Yongtian Xie: College of Urban Construction, Changzhou University, Changzhou 213164, China
Shaofeng Liu: College of Urban Construction, Changzhou University, Changzhou 213164, China

Sustainability, 2023, vol. 15, issue 6, 1-17

Abstract: It is still challenging to anticipate with accuracy how tunnels will behave and if they will fail when subjected to an earthquake load. In this study, assuming nonlinear material behavior and a three-dimensional inelastic rock medium, the theory of damage mechanics is applied to numerical simulation to build a curved tunnel-surrounding rock model, whose correctness was verified in laboratory experiments. To better understand the influence of surrounding rock strength on the seismic performance of a curved tunnel, the stratum parameters of the curved tunnel-surrounding rock system are quantified. The findings demonstrate that the damage process in curved tunnels is a circular process of damage change, and the model accurately captures these structural aspects of the damage evolution process. In addition, structural damage can be identified using displacement detection because the displacement of a curved tunnel is directly related to its compression damage. Finally, the seismic response of the curved tunnel-surrounding rock system is studied parametrically to determine the extent to which different parameters affect the seismic response. These parameters, including elastic modulus, friction angle, cohesion, and Poisson’s ratio, are characteristics of rock-medium materials. We then created multi-factor evaluation formulas to direct the surrounding rock to reinforce.

Keywords: curved tunnel; seismic dynamic response; laboratory model experiment; numerical simulation; damage assessment (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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