DOI: 10.1016/j.tust.2020.103321
论文题名: Nonlinear dynamic analysis and damage evaluation of hydraulic arched tunnels under mainshock–aftershock ground motion sequences
作者: Sun B. ; Zhang S. ; Deng M. ; Wang C.
刊名: Tunnelling and Underground Space Technology
ISSN: 8867798
出版年: 2020
卷: 98 语种: 英语
英文关键词: Damage evaluation
; Hydraulic arched tunnels
; MSAS excitations
; Nonlinear dynamic response
; Single mainshock excitations
Scopus关键词: ABAQUS
; Arches
; Damage detection
; Dynamic response
; Dynamics
; Earthquake effects
; Fluid structure interaction
; Nonlinear analysis
; Seismic design
; Commercial software
; Damage evaluation
; Engineering failures
; Global damage index
; Mainshock
; MSAS excitations
; Non-linear response
; Seismic excitations
; Tunnel linings
; aftershock
; damage mechanics
; dynamic response
; ground motion
; hydraulic fracturing
; nonlinearity
; structural response
; tunnel
英文摘要: The significant life engineering failure and financial toll caused by mainshock–aftershock (MSAS) ground motion sequences have highlighted the importance of focusing on aftershocks. The current seismic design of hydraulic arched tunnels generally involves a dynamic analysis that assumes that a single seismic excitation or multiple single seismic excitations are applied. However, this assumption may underestimate the seismic response of hydraulic arched tunnels. The focus of this study is to evaluate the effect of both the mainshock excitation-induced nonlinear response and the MSAS excitation-induced nonlinear response of hydraulic arched tunnels. For this purpose, a numerical model is built in the commercial software ABAQUS, and it considers the fluid-structure-rock interaction system. Twenty-one as-recorded MSAS ground motion sequences are selected, and the seismic wave input method is verified before a nonlinear dynamic analysis is conducted. According to the damage patterns of tunnels under Wenchuan seismic excitation, the lining local damage index (LLDI) and the lining global damage index (LGDI) are established to assess the effect of single mainshock excitations and MSAS excitations on hydraulic arched tunnels. The results reveal that MSAS excitations can cause relatively severe cumulative damage and have a negative impact on the nonlinear dynamic response of the hydraulic arched tunnel compared to single mainshock excitations. Moreover, the aftershocks not only lead to an increase in the LGDI of the hydraulic arched tunnel at the end of the MSAS excitations but also enhance the LLDI of the arch section and sidewall section. In contrast, the aftershocks induce no significant change in the LLDI of the bottom section of the hydraulic arched tunnel. Thus, MSAS excitations should be considered in the seismic design of hydraulic arched tunnels. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158553
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300350, China; Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration, Tianjin, 300350, China; School of Civil Engineering, Tianjin University, Tianjin, 300350, China; Xinjiang Ertix River Basin Development and Construction Management Bureau, Urumqi, 830000, China
Recommended Citation:
Sun B.,Zhang S.,Deng M.,et al. Nonlinear dynamic analysis and damage evaluation of hydraulic arched tunnels under mainshock–aftershock ground motion sequences[J]. Tunnelling and Underground Space Technology,2020-01-01,98