不同地震激励下公用隧道的地震反应

IF 2.5 3区 工程技术 Q2 ENGINEERING, CIVIL Geomechanics and Engineering Pub Date : 2021-01-01 DOI:10.12989/GAE.2021.24.1.067
Chenglong Wang, Xuan-ming Ding, Zhi-xiong Chen, Li Feng, Liang Han
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引用次数: 3

摘要

研究了地震动对公用隧道地震反应的影响。在横向均匀激励下进行了一系列小尺度振动台模型试验。采用EL-Centro和Taft地震波的不同峰值加速度。测量并讨论了加速度响应、土压力、地震应变、弯矩和结构变形。结果表明,地震波类型对土体-结构加速度响应有显著影响。然而,无论地震波和隧道类型如何,土体加速度振幅沿深度的变化都是一致的。靠近顶底板的水平土压力值明显大于其他深度。总体而言,模型外表面应变响应比内表面应变响应更显著,且模型端部应变峰值大于中部应变峰值。弯矩受输入加速度和地震波类型的影响较大,且弯矩受输入加速度和地震波类型的影响较大。顶板和底板剪切变形方向相反,模型结构呈现旋转趋势。
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Seismic response of utility tunnels subjected to different earthquake excitations
The influence of ground motions on the seismic response of utility tunnels was investigated. A series of small-scale shaking table model tests were carried out under uniform excitation in the transverse direction. Different peak accelerations of EL-Centro and Taft earthquake waves were applied. The acceleration responses, earth pressure, seismic strain, bending moment and structure deformations were measured and discussed. The results showed that the types of earthquake waves had significant influences on the soil-structure acceleration responses. However, the amplitude of the soil acceleration along the depth showed consistent variation regardless of the types of earthquake waves and tunnels. The horizontal soil pressure near the top and bottom slabs showed obviously larger values than those at other depths. In general, the strain response in the outer surface was more significant than that on the inner surface, and the peak strain in the end section of the model was larger than that in the middle section. Moreover, the bending moment at the corner points was much larger than that at middle point, and the bending moment was greatly affected by both input accelerations and seismic wave types. The opposite direction of shear deformation on the top and bottom slabs presented a rotation trend of the model structure.
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来源期刊
Geomechanics and Engineering
Geomechanics and Engineering ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL
CiteScore
5.20
自引率
25.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Geomechanics and Engineering aims at opening an easy access to the valuable source of information and providing an excellent publication channel for the global community of researchers in the geomechanics and its applications. Typical subjects covered by the journal include: - Analytical, computational, and experimental multiscale and interaction mechanics- Computational and Theoretical Geomechnics- Foundations- Tunneling- Earth Structures- Site Characterization- Soil-Structure Interactions
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